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Evaluating the efficacy of a newly developed palm-based process aid on nitrile rubber composites J. Rubber. Res. (IF 0.353) Pub Date : 2021-01-16 Hani Mohd Hanif, Kok Chong Yong, Siang Yin Lee
The exploration of bio-based process aid is still ongoing in the effort to replace petroleum-based process oil. In this study, the efficacy of a newly developed palm-based process aid (Bio) on nitrile rubber (NBR) composites was investigated by varying its concentration from 0.0 to 10.0 phr. A comparison was made against a commercial oil (CO), i.e. naphthenic oil in terms of Mooney viscosity, cure
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Structure and composition characterization of biocomposites filled with sol–gel bioglasses from the CaO–SiO 2 –P 2 O 5 –Ag 2 O systems J. Rubber. Res. (IF 0.353) Pub Date : 2021-01-12 Abdullah G. Al-Sehemi, Ahmed A. Al-Ghamdi, Nikolay T. Dishovsky, Lachezar Radev, Irena Mihailova, Petrunka A. Malinova, Nikolay T. Atanasov, Gabriela L. Atanasova
Lately silver has become extremely important among alloying additives used to produce glassy materials with specific tailored properties. The aim of the study is to characterize bioactive glasses belonging to the CaO–SiO2–P2O5–Ag2O system by SEM and EDX methods, as well as biocomposites based on natural rubber containing those fillers. The focus is on the influence that silver oxide and the mechanism
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The rheological, mechanical and aging properties of AEM/EPDM rubber blends J. Rubber. Res. (IF 0.353) Pub Date : 2021-01-11 Selda Öztürk, Ezgi Erbek Cömez, Halit L. Hoşgün
Rubbers are used in many applications in industries such as chemistry, automotive, agriculture, and aviation. However, different types of rubbers should be used to meet the end-user expectations in all these areas of use. In recent years, the use of the blending method has obtained both superior properties and low-cost rubbers with the synergistic effect of two different rubbers. Ethylene acrylic rubber
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A study into crack initiation and growth in peroxide-cured silica-filled polybutadiene rubber vulcanisate under a cyclic loading condition J. Rubber. Res. (IF 0.353) Pub Date : 2021-01-09 Muhammad Farooq, Ali Ansarifar, Xujin Bao
Crack initiation and propagation in a peroxide-cured polybutadiene rubber reinforced with silanised silica nanofiller were studied under a cyclic loading condition. The fatigue properties of the semi-transparent rubber samples were tested at a constant strain amplitude, test frequency and temperature. Initiation and subsequent growth of cracks in the rubber samples were observed using an optical microscope
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Thermo-hyper-viscoelastic analysis of a rubber cylinder under cyclic deformation J. Rubber. Res. (IF 0.353) Pub Date : 2021-01-04 Amirheshmat Khedmati Bazkiaei, Kourosh Heidari Shirazi, Mohammad Shishesaz
In the present work, analysis of the thermal behavior of a rubber cylinder under the repeated deformation is studied. This problem is divided into two correlated parts including transient thermal heat conduction and cyclic mechanical loading. To find the best approach-numerical method, the problem is modeled and analyzed by three approaches including coupled approach-FEM, uncoupled approach-FEM as
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Effect of silanised reinforcements on thermal, wear, visco-elastic and fatigue behaviour of stitched E-glass fibre-reinforced epoxy hybrid composite J. Rubber. Res. (IF 0.353) Pub Date : 2021-01-03 N. Velmurugan, G. Manimaran, S. Ravi, D. Jayabalakrishnan
Carboxyl-terminated butadiene acrylonitrile liquid rubber toughened silicon carbide and stitched E-glass fibre-reinforced epoxy composite has been fabricated and tested for their relative effect on thermal, wear, visco-elastic and fatigue behaviour. The main objective of this present work is to explicate the importance of rubber toughening on high brittle polymer matrix and the need for secondary strengthening
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Optimization of a protein extraction method from natural rubber sheets made of Hevea brasiliensis latex J. Rubber. Res. (IF 0.353) Pub Date : 2021-01-03 Surattiya Srisomboon, Kanthida Wadeesirisak, Laurent Vaysse, Jérôme Sainte-Beuve, Natedao Musigamart, Siriluck Liengprayoon, Frédéric Bonfils, Kittipong Rattanaporn, Céline Bottier
A method to extract proteins from natural rubber (NR) samples has been developed to characterize the protein composition of NR by SDS-PAGE electrophoresis. While the incubation of NR pieces in aqueous buffers did not provide satisfactory results (no protein bands detected by SDS-PAGE), the solubilization of NR pieces in an organic solvent, prior to centrifugation and protein extraction from the obtained
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Suitability of natural rubber-based polymer electrolyte for energy storage J. Rubber. Res. (IF 0.353) Pub Date : 2021-01-01 H. G. N. Rajapaksha, K. S. Perera, K. P. Vidanapathirana
Electrochemical double-layer capacitor (EDLC) is an evolving member in the energy storage movement which really plays a major part in satisfying the power demands of electronic devices and systems. Today, a substantial interest is paid on environmental friendly, cheap and safe devices in the modern world. Therefore, the present study was carried out to fabricate EDLCs using natural rubber-based solid
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Graphene oxide/low ammonia NRL nanocomposite-based electrode in various electrolyte concentrations: electrical properties and capacitive behavior for supercapacitor J. Rubber. Res. (IF 0.353) Pub Date : 2020-11-04 M. D. Nurhafizah, I. Sabar, A. B. Suriani, A. Mohamed
Here, we report a fast fabrication process of nanocomposites with better electrical properties by intermixing graphene oxide (GO) and low ammonia natural rubber latex (NRL) polymer via the one-step method (~ × 10–5 to × 10–7 S cm−1). In comparison, the nanocomposite synthesized by the two-step method demonstrated lower electrical properties which were calculated to be × 10–7 S cm−1. Obviously, the
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Epoxidised natural rubber (ENR) latex: an alternative raw material for latex dipped products J. Rubber. Res. (IF 0.353) Pub Date : 2020-11-04 Dazylah Darji, Fatimah Rubaizah Mohd Rasdi, Mohamad Akmal Abdul Rahim, Muhammad Syaarani Danya
The utilisation of epoxidised natural rubber (ENR) for latex products is limited due to the inability of the ENR latex to form film through typical coagulant dipping processes. This is due to the low total solid content (TSC) and the presence of the non-ionic surfactant in the ENR latex. To use the ENR latex for dipping applications, concentration process via membrane technology is used to reduce the
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Implications of the age of Hevea progenies in the precocious yield J. Rubber. Res. (IF 0.353) Pub Date : 2020-10-15 Lígia Regina Lima Gouvêa, Elaine Cristine Piffer Gonçalves, Paulo de Souza Gonçalves
The objective of the present study was to promote a better understanding of the rubber yield of young progenies of Hevea brasiliensis evaluating the stability and the repeatability of early rubber yield test employed in a genetic breeding programme. The genetic material consisted of 30 open pollination progenies evaluated in the Colina county, São Paulo state, Brazil, in a randomised block design.
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Impact of non-rubber components on the branching structure and the accelerated storage hardening in Hevea rubber J. Rubber. Res. (IF 0.353) Pub Date : 2020-10-15 Porntip Rojruthai, Thawiwan Kantaram, Jitladda Sakdapipanich
Natural rubber (NR) contains cis-1,4-polyisoprene as well as a small quantity of non-rubber components, affecting the physical properties of NR, especially the storage hardening via gel formation. The free and/or linked non-rubber components were removed from NR by various treatments. The origin of gel formation in NR mainly resulted from proteins, which could be removed by enzymatic deproteinisation
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Effect of Maillard reaction in ammonia preserved natural rubber latex using reducing sugars J. Rubber. Res. (IF 0.353) Pub Date : 2020-10-10 Manroshan Singh, Azhar Mat Easa, Baharin Azahari
Investigation of Maillard reaction in natural rubber (NR) latex was carried out using two reducing sugars, glucose and ribose. Both reducing sugars together with a 1:1 mixture were added as 5 wt% solution to concentrated NR latex preserved with ammonia in a 1:1 ratio and preheated at 27, 70 and 90 °C for 2 h. The changes in the latex due to the reaction were characterised using pH and L values for
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Epoxidised natural rubber as adhesion promoter in natural rubber based compounds J. Rubber. Res. (IF 0.353) Pub Date : 2020-10-09 Murat Öter, Bağdagül Karaağaç
Natural rubber (NR) is the most preferred raw material for both tyre and non-tyre applications, which require good adhesion performance. It has a naturally sticky character to provide green tack. However, it has limitations to improve adhesion further due to its relatively low reactivity. In this study, epoxidised natural rubber (ENR) has been evaluated as an adhesion promoter for NR based model tyre
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A framework for model base hyper-elastic material simulation J. Rubber. Res. (IF 0.353) Pub Date : 2020-10-08 Amirheshmat Khedmati Bazkiaei, Kourosh Heidari Shirazi, Mohammad Shishesaz
In this research, a framework for modelling and simulation of hyper-elastic materials is proposed. The framework explains how to employ strain energy functions as a constitutive model, standard loading test data, and a powerful optimisation method to determine a mathematical function for explaining the mechanical behaviour of a hyper-elastic material using minimum types of loading test data. In the
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Microstructure of uniaxially fatigued thermally aged vulcanised natural rubber filled with cerium oxide J. Rubber. Res. (IF 0.353) Pub Date : 2020-10-06 Wuwei Duan, Yanping Wang, Chongrui Ji, Zhe Zhang, Xu Chen, Jianjun Liu, Zheng Pan, Yu Qiao
The effects of a cerium oxide (CeO2) filler on the fatigue properties of heat-aged vulcanised natural rubber (NR) were tested and analysed. The vulcanised NR specimens, filled and unfilled with CeO2, were heat-treated for 24 h. Uniaxial fatigue tests were performed on the two specimens under different strain amplitudes, and the microstructures of the fracture surfaces of the specimens were analysed
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Studies on natural rubber nanocomposites by incorporating zinc oxide modified graphene oxide J. Rubber. Res. (IF 0.353) Pub Date : 2020-10-06 Jophy Jose, Susamma Athikalam Paulose
To obtain an efficient performance of the natural rubber/graphene oxide nanocomposites, it is essential to enhance the interfacial interaction between the filler and the polymeric matrix. The present study aims to improve the interfacial interaction between natural rubber (NR) and graphene oxide (GO) by modifying GO with zinc oxide nanoparticles (ZGO) using the coprecipitation method. The structural
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Controlling the characteristics of raw natural rubber by partial degradation in the latex stage using a water-soluble degrading agent J. Rubber. Res. (IF 0.353) Pub Date : 2020-09-27 Nurul Hayati Yusof, Krishna Veni Baratha Nesan, Fatimah Rubaizah Mohd Rasdi
Partial degradation of high ammonia natural rubber (HANR) in the latex stage was successfully carried out in the presence of periodic acid as a water-soluble degrading agent at ambient temperatures, i.e. 30 °C. The number average molecular weight (Mn), weight average of molecular weight (Mw), gel content and Mooney viscosity were decreased as the periodic acid concentrations increased. The polydispersity
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Encapsulation of acidified chitosan within partially cross-linked natural rubber matrices and their potential slow-release application J. Rubber. Res. (IF 0.353) Pub Date : 2020-09-21 Muhammad Rahim, Mas Rosemal Hakim Mas Haris, Norhidayah Abu
Biocomposites comprising acidified chitosan (CTS) encapsulated in partially cross-linked natural rubber (NR) matrices (CTS-e-NR) were prepared and characterized by Fourier transform infrared spectroscopy (FT-IR), thermogravimetric analysis (TGA) and field emission scanning electron microscopy (FE-SEM). The results of FT-IR, TGA and FE-SEM revealed that CTS was merely encapsulated within partially cross-linked
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Cytotoxicity and genotoxicity of Hevea brasiliensis latex C-serum DCS sub-fraction as anticancer agents J. Rubber. Res. (IF 0.353) Pub Date : 2020-09-20 Yang Kok Lee, Ong Ming Thong, E. Sunderasan, Abd. Rahman Norazreen, Subramaniam Sreeramanan
Dialysed latex C-serum supernatant (DCS) sub-fraction from the rubber tree (Hevea brasiliensis) was reported to exert significant anti-proliferative effect on specific cancer cell lines, especially in human triple negative breast cancer (MDA-MB-231) and human liver carcinoma (HepG2) cells. In the present study, two human non-cancer origin cell lines, MCF-10A (human breast epithelial cells) and HDFa
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Effects of cassava allelochemicals on rubber tree pathogens, soil microorganisms, and soil fertility in a rubber tree–cassava intercropping system J. Rubber. Res. (IF 0.353) Pub Date : 2020-09-15 Zifan Liu, Peipei Liu, Feng An, Linlin Cheng, Ting Yun, Xiaowei Ma
The rubber tree (Hevea brasiliensis)–cassava (Manihot esculenta) intercropping system is one of the most popular intercropping patterns for small-holder rubber planters. However, this practice is not recommended in some rubber-producing countries, since it is believed that the rubber tree and cassava share some identical pathogens and that the intercropping system will deplete soil fertility. The effects
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Coupling agent-modified corn stalk cellulose/used rubber powder composites J. Rubber. Res. (IF 0.353) Pub Date : 2020-09-12 Weili Wu, Fengyu Chen
Used rubber powder was reinforced by corn stalk cellulose to prepare corn stalk cellulose/used rubber powder composites, and the coupling agents 3-mercaptopropyl trimethoxysilane (KH590), r-aminopropyltriethoxysilane (KH550), isopropyl dioleic (dioctylphosphate) titanate (HY101) and bis-(γ-triethoxysilylpropyl)-tetrasulfide (Si69) were used to modify the interphase between used rubber powder and corn
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Silicate solubilizing bacteria UPMSSB7, a potential biocontrol agent against white root rot disease pathogen of rubber tree J. Rubber. Res. (IF 0.353) Pub Date : 2020-09-11 Imran Shabbir, Mohd Yusoff Abd Samad, Radziah Othman, Mui-Yun Wong, Zulkefly Sulaiman, Noraini Md Jaafar, Syed Asad Hussain Bukhari
Rigidoporus microporus is a causal agent of white root rot disease of rubber trees. Chemical control is commonly used against this disease but it is expensive, causes environmental pollution and fungal resistance. Silicon is a beneficial element which enhances plant growth and disease resistance but mostly present in insoluble forms. Silicate solubilizing bacteria (SSB) can solubilize the insoluble
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Effect of filler on the total protein content and mechanical properties of natural rubber latex films at different filler loadings J. Rubber. Res. (IF 0.353) Pub Date : 2020-09-10 A. R. Ruhida, A. Hassan, S. Shamheza
Calcium carbonate (CaCO3) is an important filler, widely used rubber industries, particularly in natural rubber latex dipped such as gloves. The main advantages are cost reduction and product improvement. With the development of technology in superfine filler production, the use of CaCO3 as a non-reinforcing filler has gained much attention as it could help to improve natural rubber (NR) product properties
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Effect of density parameter in a disk made of orthotropic material and rubber J. Rubber. Res. (IF 0.353) Pub Date : 2020-09-01 Pankaj Thakur, Neeru Gupta, Monika Sethi, Kanav Gupta
The objective of this paper is to present the study of density parameter in a disk made of orthotropic material and rubber by using Seth’s transition theory. This theory includes classical macroscopic solving problems in plasticity, creep relaxation, and semi-empirical yield conditions. It has been observed that disk made of rubber material requires higher angular speed to yield at the internal surface
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A review of the feasibility of using crumb rubber derived from end-of-life tire as asphalt binder modifier J. Rubber. Res. (IF 0.353) Pub Date : 2020-08-29 Abdalrhman Milad, Abobaker G. F. Ahmeda, Aizat Mohd Taib, Suzielah Rahmad, Mohmed Solla, Nur Izzi Md Yusoff
The use of recycled crumb rubber (CR) in asphalt pavements could be an essential step towards ensuring a more sustainable future in addition to opening a new investment opportunity for global investors. Asphalt modifiers have the ability to enhance the performance of flexible pavements and contribute towards ensuring a more sustainable environment. The utilization of CR produced from end-of-life tires
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Preparation and characterization of functionalized multiwalled carbon nanotubes filled polyethylene oxide nanocomposites J. Rubber. Res. (IF 0.353) Pub Date : 2020-08-27 Khalid Saeed, Idrees Khan
The functionalized multi-walled carbon nanotubes (F-MWCNTs) filled polyethylene oxide (PEO) nanocomposites were prepared by casting technique and characterized by scanning electron microscopy (SEM), polarized optical microscopy (POM), thermal gravimetric analysis (TGA) and differential thermal analysis (DTA). The MWCNTs were functionalized by Friedel–Crafts acylation, which introduced aromatic amine
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Genetic diversity analysis of Corynespora cassiicola isolates on the rubber tree ( Hevea brasiliensis ) in Vietnam using ribosomal DNA internal transcribed spacer (rDNA-ITS) sequences and sequence-related amplified polymorphism (SRAP) J. Rubber. Res. (IF 0.353) Pub Date : 2020-08-24 N. D. Hieu, N. A. Nghia, N. T. K. Uyen, N. N. B. Chau, N. B. Quoc
A total of 76 Corynespora cassiicola isolates collected from 16 rubber clones in several geographic regions of Vietnam, were studied for genetic diversity by ribosomal DNA internal transcribed spacer (rDNA-ITS) sequences and sequence-related amplified polymorphism (SRAP) techniques. Results of rDNA-ITS sequence analysis indicated 2 nucleotide polymorphisms at the 135th (cytosine/thymine) and 474th
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The mechanical and thermal properties of KH590-basalt fibre-reinforced silicone rubber/fluorine rubber composites J. Rubber. Res. (IF 0.353) Pub Date : 2020-08-13 Weili Wu, Bowen Yu
Chopped basalt fibre (BF)-reinforced silicone rubber/fluorine rubber composites were investigated to improve their mechanical and thermal properties, in which the blend of silicone rubber (MVQ) and fluorine rubber (FKM) was used as a matrix of the composites, the BF was used as a reinforcement, and the coupling agents of KH550 (3-amino propyltriethoxysilane), KH590 (3-mercaptopropyl trimethoxysilane)
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Experimental study on the effect of alternating ageing and sea corrosion on laminated natural rubber bearing’s tension-shear property J. Rubber. Res. (IF 0.353) Pub Date : 2020-06-29 Y. M. Li, Y. H. Ma, G. F. Zhao, F. L. Zhou
The laminated natural rubber bearings (NRBs) used in offshore or sea-crossing bridges, are subjected to marine environments over an extended period and therefore vulnerable to the effect of alternating ageing and sea corrosion caused by weather conditions such as temperature, rain, sun, sea winds, waves etc. In addition, there are no systematic theories about the tension capability for NRBs now. Therefore
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Optimising Agrobacterium -mediated transformation of Corynespora cassiicola to deliver DsRed J. Rubber. Res. (IF 0.353) Pub Date : 2020-06-06 Murnita Mohmad Mahyudin, Gary D. Foster, Andy M. Bailey
Corynespora cassiicola is a cosmopolitan fungus with a broad host range. One of the hosts often severely impacted is the rubber tree, Hevea brasiliensis on which it causes devastating leaf defoliation. To date, control of the disease is mainly focused on the application of fungicides, but this only provides short-term solution. Functional genomics through transformation allows evaluation of the disease
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Field latex production in Southern Thailand: a study on farmers’ and traders’ practices that may affect the quality of natural rubber latex delivered to the factories J. Rubber. Res. (IF 0.353) Pub Date : 2020-05-26 Bénédicte Chambon; Kanchana Duangta; Arunee Promkhambut; Gregory Lesturgez
Field latex is an important raw material in Thailand, produced by a large number of smallholders and handled by numerous local traders. This diversity of stakeholders involved along the production and marketing chain could result in the variability of the latex quality delivered to the factories. Latex processing industries need a raw material with consistently specified properties. Therefore, it is
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The effect of protecting waxes on staining antidegradant performance in tyre sidewall formulation J. Rubber. Res. (IF 0.353) Pub Date : 2020-05-25 M. Sharj-Sharifi; S. Taghvaei-Ganjali; F. Motiee
Certain materials such as wax, when incorporated into rubber formulations, bloom and form a surface barrier layer against ozone attack. The ozone resisting film results in an unpleasant appearance on the rubber surface. In tyres, sidewalls are more susceptible to ozone attack leading to degradation both in dynamic and static conditions. Also, tyre appearance is an important factor in quality control
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A railway isolator to preserve the fundamental frequency analysis and test J. Rubber. Res. (IF 0.353) Pub Date : 2020-05-22 Hao Dong; Zhongji Li; Leina Gao
Isolators have become more attractive to researchers and industries alike over the past decade. Nonlinear stiffness for the rubber isolator is designed in the floating slab system to obtain or maintain the desired natural frequency. According to the vibration mechanics theory, the natural frequency formula can be deduced backward to obtain the function of stiffness. This then yields a simple integral
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Efficiency of rubber-pad cushion in bending process of a thin aluminum sheet J. Rubber. Res. (IF 0.353) Pub Date : 2020-05-19 L. Ben Said; M. Wali; N. Khedher; A. Kessentini; A. Algahtani; F. Dammak
The present paper presents numerical and experimental comparative studies between the conventional bending process (bending using punch and V-die) and bending with a rubber-pad cushion. In fact, a finite-element method is introduced to compare these two procedures used to bend AA1050-H14 Aluminum thin sheet. An elastoplastic constitutive model with quadratic yield criterion of Hill 48 and isotropic
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Substantial reduction of carbon black and balancing the technical properties of styrene butadiene rubber compounds using nanoclay J. Rubber. Res. (IF 0.353) Pub Date : 2020-05-02 Harikrishna Kumar Mohan Kumar; Shankar Subramaniam; Rajasekar Rathanasamy; Samir Kumar Pal; Sathish Kumar Palaniappan
Carbon black is the prime component used in tyre manufacturing. Normally, 40–60 phr of carbon black is added in rubbers to enhance their physico-mechanical properties. Utilisation of high amounts of carbon black during tyre manufacturing will certainly lead to more fly loss, which may create several health hazards to humans involved in the mixing operation. This research work aims to partially replace
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Elastoplastic deformation in an isotropic material disk with shaft subjected to load and variable density J. Rubber. Res. (IF 0.353) Pub Date : 2020-04-18 Monika Sethi; Pankaj Thakur
The purpose of this paper is to present a study of elastoplastic deformation in an isotropic material disk with shaft subjected to variable density and load using Seth’s transition theory. This theory includes classical macroscopic solving problems in plasticity, creep and relaxation and assumes semi-empirical yield conditions. It has been observed that the values of angular speed decreased with increases
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Preparation of TiO 2 /Ser filler with ultraviolet resistance and antibacterial effects and its application in SBR/TRR blend rubber J. Rubber. Res. (IF 0.353) Pub Date : 2020-02-06 Yunhui Xu; Li Feng; Houluo Cong; Peipei Li; Feng Liu; Shuaishuai Song; Li Fan
TiO2/sericite (Ser) was prepared by depositing a nano-TiO2 film onto a carrier composed of sericite, an inorganic and nonmetallic mineral. Ultraviolet-resistant and antibacterial layers were then separately loaded onto the nano-TiO2 film, forming a multifunctional composite. The obtained functional TiO2/Ser composite was used as a filler and introduced into a rubber composite. It was indicated that
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Studies on non-coacervated NR–SBR latices reinforced with bentonite clay J. Rubber. Res. (IF 0.353) Pub Date : 2020-01-28 Sadhan Kumar Modak; Ayan Dey; Arup Mandal; Debabrata Chakrabarty
AbstractIn this work, a noble method is used to develop clay–polymer nanocomposite (CPN) with improved dispersion of bentonite clay (as reinforcing filler) in a nano-Styrene Butadiene Rubber/Natural Rubber blend system. The tendency of the clay particles to agglomerate has been reduced to a great extent. The observed increase in tensile modulus and the storage modulus of the ultimate CPN is attributed
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Effect of N , N ′- m -phenylene bismaleimide on mechanical performance of waste rubber powder sintered by high-pressure high-temperature method J. Rubber. Res. (IF 0.353) Pub Date : 2019-12-14 Xiao-Xue Liao; Yan-Chan Wei; Hui-Feng Zhang; Ting-Ting Zheng; Ming-Chao Luo; Shuangquan Liao
Waste rubber with three-dimensional structure is insoluble and non-melting, which creates recycling problem. The technique called “high-pressure high-temperature sintering” (HPHTS) can convert vulcanized rubber powder into usable rubber products. However, reversion occurs when vulcanizates are exposed to a prolonged treatment at high temperature. This reversion results in the decrease of mechanical
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Core collection of Hevea brasiliensis from the 1995 RRIM Hevea germplasm for effective utilisation in the rubber breeding programme J. Rubber. Res. (IF 0.353) Pub Date : 2019-12-12 A. F. Adifaiz; N. A. Maiden; S. Roslinda; Z. Sulaiman; M. Y. Rafii
The rubber tree (Hevea brasiliensis) is the world’s major source of natural rubber. An expedition to the Amazonas and Para states by the Rubber Research Institute of Malaysia (RRIM) in 1995 led to the successful collection of more than 50,000 genotypes from different locations of the states to broaden the existing gene pool. Realising the severe limitations faced with large germplasm, a core collection
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Mechanical and physical characterizations of styrene butadiene rubber: bagasse composites J. Rubber. Res. (IF 0.353) Pub Date : 2019-12-05 Eyad Sayed Abdallah Khalaf; H. Farag; E. M. Abdel-Bary
The incorporation of prevalent industrial wastes (i.e. residues) from sugar industries as reinforcing fillers in rubber composites has emerged as a viable solution, enabling improvements in the environment, and getting rid of bagasse waste has also resulted in cost reduction of the final rubber products. In this study, the use of maleic anhydride was proposed to improve the interfacial adhesion between
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Relationships between swelling temperature and shape memory properties of palmitic acid-based shape memory natural rubber J. Rubber. Res. (IF 0.353) Pub Date : 2019-11-30 Yu Yang Kow; Ai Bao Chai; Jee Hou Ho
This article investigates the effect of swelling temperature on palmitic acid-based shape memory natural rubber (SMNR). SMNR has high storage modulus and excellent energy absorption capability which is suitable to replace the electronic parts in the lightweight machine. Although the swelling process increased the trigger temperature of palmitic acid-based SMNR, high thermal energy in swelling process
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Hardened and transfer properties of self-compacting concretes containing pre-coated rubber aggregates with crushed dune sand J. Rubber. Res. (IF 0.353) Pub Date : 2019-11-26 Said Zaouai; Ahmed Tafraoui; Abdelkadir Makani; Farid Benmerioul
Many researchers believe that the adhesion failure between rubber and cement paste is one of the main reasons the strength of concrete containing these aggregates drops sharply. This paper provides strength and durability experiment results which reveal the effect of pre-coating rubber granules with crushed dune sand in terms of their mechanical performance, these tests aimed to enhance the durability
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Thermal and crystallization behaviour of epoxidized high cis -polybutadiene rubber J. Rubber. Res. (IF 0.353) Pub Date : 2019-11-02 Marcos L. Dias; Frederico A. P. Schoene; Camila Ramirez; Isabela A. Graciano; Lys Sirelli; Raquel P. Gonçalves
High cis-polybutadiene (HCBR) was epoxidized by using in situ formed formic acid and hydrogen peroxide in the absence and presence of Tween 20 at 50 °C at different reaction times. Epoxidized HCBR (EHCBR) with degree of epoxidation from 3.7 to 38.8% was obtained. Low degree epoxidation EHCBR are semi-crystalline rubbers presenting lower crystallization temperatures than the non-epoxidized rubber on
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Utility of PacBio Iso-Seq for transcript and gene discovery in Hevea latex J. Rubber. Res. (IF 0.353) Pub Date : 2019-10-28 K.-S. Chow; J.-S. Khoo; Z. Mohd.-Zainuddin; S.-M. Ng; C.-C. Hoh
Full-length cDNA libraries (< 1 kb, 1–2 kb, 2–3 kb, 3–6 kb size ranges) were generated from latex of a Hevea brasiliensis tree clone, RRIM 600, for PacBio Iso-Seq sequencing. The total number of high-quality consensus sequences obtained from nearly 20 Gb of raw reads was 207,943 having an average length of 1823 bp and N50 of 2538 bp. Mapping of high-quality consensus sequences to the published Reyan
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Colloidal properties of epoxidized natural rubber latex prepared via membrane separation technology J. Rubber. Res. (IF 0.353) Pub Date : 2019-10-19 Manroshan Singh; Fatimah Rubaizah Mohd Rasdi
To date, epoxidized natural rubber (ENR) latex is still far from being commercially available for the production of dipped latex goods although the process was reported in 1922. Therefore, the objective of this work is to establish an understanding on the colloidal properties of ENR latex and relate them to coagulation and film formation. To do so, ENR latex was first prepared from low ammonia preserved
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Optimisation of elastomeric bearings’ vulcanisation process using response surface methodology and desirability function approach J. Rubber. Res. (IF 0.353) Pub Date : 2019-10-17 Ali İhsan Boyacı; Kasım Baynal
In this study, response surface methodology and desirability function approach (DFA) were used to optimise the vulcanisation process of elastomeric bearings to obtain better quality products. For this purpose, compressive stiffness and vertical deflection under maximum load were determined as response variables with a target at 198 kN/mm and 3.46 mm, respectively, in accordance with customer’s request
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Room temperature self-healable natural rubber J. Rubber. Res. (IF 0.353) Pub Date : 2019-10-10 Nuur Laila Najwa Thajudin; Nur Syamsinar Sardi; Mohd Hafiz Zainol; Raa Khimi Shuib
In this work, a novel self-healing natural rubber was developed, and the concepts of mixing both covalent and reversible ionic crosslinks bonds were proposed. The developed materials have the capability of repairing themselves and recovering functionality when they are damaged without the need for detection. Evidence that covalent and reversible ionic crosslinks bonds had occurred was determined by
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Correction to: An uncommon outbreak of irritant contact dermatitis caused by rubber accelerators: a historical cohort study J. Rubber. Res. (IF 0.353) Pub Date : 2019-09-27 Attasit Rattanarak, Naesinee Chaiear, Jitladda Sakdapipanich, Jinjutha Wiriyanantawong
The original version unfortunately contained mistakes. The institution of the author Jitladda Sakdapipanich was wrong.
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An uncommon outbreak of irritant contact dermatitis caused by rubber accelerators: a historical cohort study J. Rubber. Res. (IF 0.353) Pub Date : 2019-08-30 Attasit Rattanarak; Naesinee Chaiear; Jitladda Sakdapipanich; Jinjutha Wiriyanantawong
Our aim was to study the association between the rubber accelerators and predisposing factors of irritant contact dermatitis (ICD) among the semiconductor factory workers. The research design was a historical cohort study. The study population was divided into two groups: (1) the rubber accelerator exposure group, including workers who wore natural rubber finger cots containing 2,2 dibenzthiazyl disulfide
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Comparative advantage and export performance of India’s rubber sector: an exploratory analysis J. Rubber. Res. (IF 0.353) Pub Date : 2019-08-29 Joby Joseph; K. S. Hari
During the last 21 year period from 1996–2016, the total value of imports of rubber and rubber products grew at a rate of 17.66% compared to 14.18% growth rate in the value of exports. As a result of higher growth in imports and lower growth in exports, in the last 10 years, external trade in this segment had shown negative balance of trade consistently. In 2016–2017, the country had a negative balance
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Wear and thermal properties of carbon fiber reinforced silicone rubber/fluorine rubber composites J. Rubber. Res. (IF 0.353) Pub Date : 2019-08-23 Weili Wu; Xiang Li
Wear and high–low temperature resistance composites with enhanced mechanical and thermal properties were preparation by carbon fiber (CF) reinforced silicone rubber (MVQ)/fluorine rubber (FKM), the coupling agent was used as a compatibilizer. The effect of coupling agent type and content on mechanical properties of CF/MVQ/FKM composites was investigated, the interaction between coupling agent and composites
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Evolution of Payne effect of silica-filled natural rubber in curing process J. Rubber. Res. (IF 0.353) Pub Date : 2019-08-22 J. Wu; L. Chen; B. L. Su; Y. S. Wang
Vulcanisation is the key process for determining the final properties of elastomers due to the relationship between curing condition and viscoelastic behaviour. This study focuses on the variations in the dynamic behaviour of silica-filled natural rubber caused by crosslinking. The rubber samples with different degrees of curing (DOC) are prepared by thermal quenching during the crosslinking process
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RTV mould rubber cured by plasma and surface coating technologies J. Rubber. Res. (IF 0.353) Pub Date : 2019-08-21 Zhihao Gu; Ye Pan; Jincheng Wang
In this work, plasma and surface coating technologies were combined and used in the modification of room-temperature-vulcanisated silicone rubber (RTV), and their properties were characterised and compared. First, the surface of pure RTV was cured by different plasmas to improve its roughness and hydrophilicity. The plasmas used was nitrogen, oxygen, and atmosphere plasmas. Then, a type of silicone
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Urea as a single denaturing agent in deproteinisation of natural rubber latex J. Rubber. Res. (IF 0.353) Pub Date : 2019-06-13 A. Nurulhuda; A. H. Aziana; A. R. Norazreen; A. Nur Aziah; M. Siti Nor Qamarina
This paper describes the utilisation of urea as a single chemical agent to obtain deproteinised high ammoniated natural rubber latex (HA-NRL). The role of urea in HA-NRL deproteinisation was further investigated by employing two different concentrations of urea solution which are low (0.01–0.05%) and high (1.0–5.0%) concentrations. The study assessed the potential usage of urea as a single denaturing
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The effect of field natural rubber latex pretreatment with cationic exchange resin on latex dipped film properties J. Rubber. Res. (IF 0.353) Pub Date : 2019-06-06 S. Kaewthai; S. Puangmanee; W. Taweepreda
The current practice of concentrated natural rubber latex production includes the reduction of magnesium ion (Mg2+) with the addition of diammonium phosphate (DAP) before being transferred to undergo concentration by a centrifugation process. But in this process, the chemical reaction between Mg2+ and DAP produces a sludge waste. In this research, cationic exchange resins are used to prevent the formation
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The effect of damping in isolation system on the performance of base-isolated system J. Rubber. Res. (IF 0.353) Pub Date : 2019-06-03 Jiang Jun Lee; James M. Kelly
The use of base isolation to protect a structure and its contents from earthquake damage has proven to be an effective anti-seismic strategy during past earthquakes. Modelling of the isolation system is one of the key steps in understanding the response of the structure and more importantly to evaluate the effectiveness of the isolation system. This paper presents a study on the effect of damping in
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Assessment of oil palm ash and compounding ingredients on tensile properties of acrylonitrile–butadiene rubber using statistical design J. Rubber. Res. (IF 0.353) Pub Date : 2019-05-25 Yi Peng Teoh; Zhong Xian Ooi; Sung Ting Sam; Hanafi Ismail
Various types of chemical ingredients are needed in the rubber compounding process to obtain desired properties for a commercially useful application. To content with this, Plackett–Burman design (PBD) provides an efficient way of dealing with a large number of variables and identifying the most important parameter. This study reviews the exploitation of PBD to screen the significant effect of different
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A new method for studying the ablation/erosion properties of silicone rubber composites based on multi-phase flow J. Rubber. Res. (IF 0.353) Pub Date : 2019-05-11 Jinjin Wang; Bailin Zha; Wei Zhang; Yan Zhang; Qingdong Su
To evaluate the ablation/erosion resistance of the silicone rubber composites, a new method based on multi-phase flow produced by oxygen–kerosene ablation test device was put forward and a new kind of particle was applied in the test. The phase transition characteristics of B2O3 particles and Al2O3 particles in high-temperature flame jet were investigated and compared. On this basis, the ablation tests
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