-
Effect of thermal-oxidative and mechanical degradation of recycled LDPE on foaming Cell. Polym. (IF 1.6) Pub Date : 2024-02-03 Huanyu Zou, Jiawei Lu, Pengfei Zhou, Tao Liu
In this study, we investigated the effect of recycling process on the molecular structure, viscoelasticity and foaming behavior of low density polyethylene (LDPE). A series of LDPE samples with different recycling process was prepared by multiple extrusion using a twin-screw extruder. The molecular weight distribution (MWD) was characterized by gel permeation chromatography (GPC). Wider MWD indicated
-
Fumed nanosilica as filler for semi-rigid palm oil-based polyurethane foam: Mechanical, material, thermal, and fire response Cell. Polym. (IF 1.6) Pub Date : 2024-02-01 Mohd Haziq Dzulkifli, Rohah A Majid, Siti Khairunisah Ghazali, Mohd Yazid Yahya
Incorporating nano-sized fillers into bio-based polyurethane (PU) foams typically enhances their properties. In present investigation, palm oil-based PU foams are fabricated with varied loadings (0 to 5 wt%) of fumed nanosilica. The foams are then characterized for their fire-retardancy, thermal stability, foam morphology, and also mechanical properties. Marginal improvement in Limiting Oxygen Index
-
Influence of particle geometry and size on the cell morphology of vacuum assisted rotationally molded foam Cell. Polym. (IF 1.6) Pub Date : 2023-04-19 J Werner, D Drummer
An increased awareness of sustainability among the population leads, from an industrial point of view, to efforts to act more ecologically as well as to the aim for lower production costs and an in...
-
A study of the cell morphology and mechanical properties of bumper material PP-T-EPDM composite foam Cell. Polym. (IF 1.6) Pub Date : 2023-01-23 Salih Hakan Yetgin, Hüseyin Unal
In this study, cellular polypropylene based composite foams were prepared using an universal injection moulding machine. The chemical foaming agent was added to neat polypropylene (PP) polymer, tal...
-
Role of hemp fiber addition on thermal stability, heat insulation, air permeability and cellular structural features of rigid polyurethane foam Cell. Polym. (IF 1.6) Pub Date : 2023-01-22 Ugur Soykan, Senol Kaya
In this current study, rigid polyurethane foams (RPUFs) composites were prepared using different percentage (3, 6, 9 and 12%) of the hemp fibers via one-shut one-step polymerization method. The inf...
-
Natural rubber/wood composite foam: Thermal insulation and acoustic isolation materials for construction Cell. Polym. (IF 1.6) Pub Date : 2023-01-06 Laura Neves de Alencar, Fábio Friol Guedes Paiva, Fernando Sérgio Okimoto, Giovani Boaventura Bacarin, Guilherme Dognani, Leandra Oliveira Salmazo, Renivaldo José dos Santos, Flávio Camargo Cabrera, Aldo Eloizo Job
With the advances in the field of civil construction and the world population growth, the development of policies is necessary for the management and reuse of generated residue. Thus, the present w...
-
Density graded polymer composite foams Cell. Polym. (IF 1.6) Pub Date : 2022-11-30 XueMei Tan, Denis Rodrigue
This article reviews the main developments associated with density graded polymer composite foams. After a short introduction, a discussion is made on both density graded polymer-based composites a...
-
A sound-absorbing and heat-insulating collagen fiber composite material Cell. Polym. (IF 1.6) Pub Date : 2022-09-27 Jiaxing Zhang Hui Chen, Zhihua Shan
Using methacrylic acid (MAA) and methyl methacrylate (MMA) as core monomers and polystyrene as the shell layer, polymer hollow microspheres (PHM) with good stability were prepared by using an alkal...
-
Compressive Properties of Poly (Dimethylsiloxane)–Hollow Glass Microballoons Syntactic Foams Cell. Polym. (IF 1.6) Pub Date : 2022-08-29 Alok Upadhyay, AV Ullas
Polymer syntactic foams are lightweight polymer composites that are prepared by introducing hollow microspheres in a resin. The main endeavour is to obtain a significant reduction in the weight of ...
-
Porous synthetic hydrogel carrying basic fibroblast growth factor with controllable and rapid degradation rate to promote wound healing Cell. Polym. (IF 1.6) Pub Date : 2022-08-26 Qian Wu, Huijie Gu, Haiyan Cui, Shu Zhou
Porous hydrogel dressings show breathability and possibility to carry and release basic fibroblast growth factor (bFGF) to promote wound healing. However, the difficult replacement may lead to the ...
-
Rigid polyurethane foam composites based on iron tailing: Thermal stability, flame retardancy and fire toxicity Cell. Polym. (IF 1.6) Pub Date : 2022-05-26 Yadong Yang, Haifeng Shen, Yuzhou Luo, Renhui Zhang, Junjie Sun, Xiuyu Liu, Zhifang Zong, Gang Tang
In order to explore the potential utilization value of iron tailings, the typical solid waste-iron tailings was introduced into rigid polyurethane foam (RPUF) as a flame retardant filler in this pa...
-
Phenolic syntactic foams: Low-density composites for structural and thermostructural applications Cell. Polym. (IF 1.6) Pub Date : 2022-05-16 Bibin John, CP Reghunadhan Nair
Syntactic foams, low density composites consisting of hollow microballoons or microspheres dispersed in a matrix, find application in various fields. The properties of these light weight composites...
-
Synthesis and properties of foams from a blend of vegetable oil based polyhydroxyurethane and epoxy resin Cell. Polym. (IF 1.6) Pub Date : 2022-05-13 Zeeshan R Ahmad, Prakash A Mahanwar
This article aims to highlight the synthesis of foams from a blend of hydroxyurethane of castor oil and epoxy resin. An epoxidized castor oil of 4% oxirane oxygen was first converted to cyclic carb...
-
Effect of strain rate and load orientation on cyclic response of anisotropic polyurethane foam Cell. Polym. (IF 1.6) Pub Date : 2022-04-13 Dorra Ben Abdeljelil, Sami Chatti, Raja O Ahmed Ben Ali
Anisotropic cellular materials, such as polymeric foams, play an important role in structures subjected to cyclic loadings. The present paper provides an experimental investigation of the mechanica...
-
Micro foaming performance of scCO2-aid glutaraldehyde/hexametaphosphate/thermoplastic starch foams modified by alkali treatment and montmorillonite nano-platelets Cell. Polym. (IF 1.6) Pub Date : 2022-03-07 Ke Wang, Ya-qiong Huang, Xiao-han Cheng, Jen-taut Yeh
The micro foaming performance, moisture resistance and dynamic viscosity of scCO2-aid glutaraldehyde/hexametaphosphate/thermoplastic tapioca starch (GA/SHMP/TOS) foams were considerably improved by...
-
Fire retardancy, thermal, and physico-mechanical properties of semi-rigid water-blown polyurethane foam from palm oil-based polyol Cell. Polym. (IF 1.6) Pub Date : 2022-02-23 Mohd Haziq Dzulkifli, Mohd Yazid Yahya, Rohah A. Majid
This paper presents the experimental work undertaken to assess rigid palm oil-based polyurethane (PU) foam. The bio-composite foam was characterized to determine its foaming kinetics and morphology...
-
Development and investigation of the applicability of computed tomography data-based modelling technique for polymeric high-density foams Cell. Polym. (IF 1.6) Pub Date : 2021-12-23 Anna Hössinger-Kalteis, Martin Reiter, Michael Jerabek, Zoltan Major
As foams have become very important in several areas and since characterizing their properties is a crucial task, a finite element simulation model for high-density closed cell foams based on compu...
-
Effect of rare earth nucleating agent on supercritical CO2 foaming behavior of block copolymerized polypropylene Cell. Polym. (IF 1.6) Pub Date : 2021-11-14 Yun Zhang, Yadong He, Chunling Xin, Yanbin Su
The rare earth nucleating agent was used to modify block copolymerized polypropylene (PPB) in foaming process. The results show that the crystallization of PPB and the melting temperature of β-crys...
-
Theoretical modeling of longitudinal piezoelectric characteristic for cellular polymers Cell. Polym. (IF 1.6) Pub Date : 2021-11-05 Ikrame Najihi, Chouaib Ennawaoui, Abdelowahed Hajjaji, Yahia Boughaleb
Efficient energy harvesting is a difficult challenge that consists in the development of systems allowing charging autonomous and low-power devices. In addition to traditional piezoelectric polymers, mono-crystals, and ceramics, cellular electrets offer consistent solutions by converting wasted vibration energy from the environment to usable electrical energy. This paper presents an electromechanical
-
Preparation and properties of high melt strength PBS and its environmentally friendly foaming materials Cell. Polym. (IF 1.6) Pub Date : 2021-10-30 Xiao-Ming Zhou, Yi-Fan Liu
In order to improve the melt strength of Poly(butylene succinate) (PBS) resin, the silane graft-crosslinked PBS copolyester materials were prepared by melt blending method with vinyltriethyl silane as graft material and benzyl peroxide (BPO) as initiator. At the same time, the environmentally friendly compound foaming agent (citric acid and sodium bicarbonate) was used as foaming agent. The results
-
Microbubble technology for natural rubber latex foam production: The use of various gas-filled microbubbles Cell. Polym. (IF 1.6) Pub Date : 2021-10-23 Kuntida Katkeaw, Matthana Khangkhamano, Rungrote Kokoo
In recent years, microbubble technology has attracted great attention in many application fields including water treatment, food processing, oil recovery, surface cleaning, and therapeutic applications. In this paper, microbubbles (MBs) of air, nitrogen, and argon were applied to produce natural rubber latex foams (NRLFs). The bubbles were generated by flowing the gas through a porous diffuser and
-
Optimization of structural parameters on hollow spherical cells manufactured by Fused Deposition Modeling (FDM) using Taguchi method Cell. Polym. (IF 1.6) Pub Date : 2021-09-01 Naserddine Ben Ali, Mohamed Khlif, Dorra Hammami, Chedly Bradai
There is a growing need for 3D printing of polymer structures in a cost-effective way and green. This study presents an experimental approach to investigate structural parameters effects on mechanical properties of polylactic acid (PLA) hollow-sphere structures manufactured with fused deposition modeling (FDM). The mechanical behavior characteristics of square_hexagonal stacking, closed_open porosity
-
Morphological evaluation of microcellular foamed composites developed through gas batch foaming integrating Fused Deposition Modeling (FDM) 3D printing technique Cell. Polym. (IF 1.6) Pub Date : 2021-08-24 G Radhakrishna, Rupesh Dugad, Abhishek Gandhi
In this article, the development of microcellular structure foams has developed by integrating the two successful and existing technologies, namely CO2 gas batch foaming and Fused Deposition Modeling (FDM) 3D printing technique. It is a novel approach to manufacture complex design porous products for customized applications. The eventual cell morphologies of the extruded 3D printing filament depends
-
Development and investigation of the applicability of microstructural models for polymeric low density foams directly obtained from computed tomography data Cell. Polym. (IF 1.6) Pub Date : 2021-08-24 Anna Hössinger-Kalteis, Julia Maurer, Martin Reiter, Michael Jerabek, Zoltán Major
Nowadays, there are several methods to obtain simulation models for foams which consider important microstructural features. This research study presents a method to obtain low density foam models directly from computed tomography (CT) data. Finite element meshes are created from CT measurement results of a polypropylene extrusion foam with two different densities. Sensitivity studies with regard to
-
A study on fabrication of nanocomposite polyethylene foam through extrusion foaming procedure Cell. Polym. (IF 1.6) Pub Date : 2021-08-20 Milad Rostami, Taher Azdast, Rezgar Hasanzadeh, Milad Moradian
Foaming a polymer not only turns it into a lightweight material but also gives some special properties to it. However, the most important issue is controlling the foaming process to achieve a desirable structure with high cell density and low relative density. In the present study, the extrusion foaming process of polyethylene was studied through stepwise amendments. An innovative extrusion system
-
An efficient and environment friendly bio-based polyols through liquefaction: Liquefaction temperature and catalyst concentration optimization and utilized for rigid polyurethane foams Cell. Polym. (IF 1.6) Pub Date : 2021-05-28 Chiragkumar M Patel, Nikhil R Dhore, Amit A Barot, Raju VSN Kothapalli
Aiming towards the liquefaction of paddy straw was accumulation as well as providing a technically viable route leading to preservation of the natural resources and environment, the paddy straw was chemically liquefied. Paddy straw were liquefied into bio-based polyol in the presence of castor oil and blend of castor and karanja oil as depolymerizing agent and P-Toluene sulfonic acid as catalyst. Liquefied
-
Morphological, thermal and mechanical properties of polypropylene foams via rotational molding Cell. Polym. (IF 1.6) Pub Date : 2021-05-25 Yao Dou, Denis Rodrigue
In this work, polypropylene (PP) was foamed via rotational molding using a chemical blowing agent (CBA) based on azodicarbonamide over a range of concentration (0 to 0.5% wt.). The samples were then analyzed in terms of morphological, thermal and mechanical properties. The morphological analysis showed a continuous increase in the average cell size and cell density with increasing CBA content. Increasing
-
Preparation and performance of melamine-formaldehyde rigid foams with high closed cell content Cell. Polym. (IF 1.6) Pub Date : 2021-05-17 Chunhui Li, Haihong Ma, Congqiang Song, Zhengfa Zhou, Weibing Xu, Qiusheng Song, Fengmei Ren
Melamine-formaldehyde (MF)rigid foams with high closed cell content were prepared via oven heating process, using MF prepolymer prepared from melamine and paraformaldehyde as a matrix, cyclohexane as the foaming agent, dimethyl silicon oil as the foam stabilizers, hydrochloric acid as the catalyst. The effect of MF prepolymer viscosity, foaming temperature, amount of catalyst on morphology, closed
-
Effect of multi-walled carbon nanotubes with different diameters on morphology and thermal and mechanical properties of flexible polyurethane foams Cell. Polym. (IF 1.6) Pub Date : 2021-05-13 Fukai Yang, Miao Xie, Zhang Yudi, Xinyu Xu
We report flexible polyurethane foams (PUFs) containing –OH functionalized multi-walled carbon nanotubes (MWCNTs) with different diameters (10–20 nm, 20–30 nm, >50 nm) from 0.1–0.6 wt% (per 100 resins of polyol by weight) prepared via in situ polymerization. After synthesis, the morphology of the MWCNT/PUF composites was observed through scanning electron microscopy (SEM) based on MWCNT amount. The
-
Characterization of microstructures of SAN foam core using micro-computed tomography Cell. Polym. (IF 1.6) Pub Date : 2021-04-05 Youming Chen, Raj Das, Hui Wang, Mark Battley
In this study, the microstructure of a SAN foam was imaged using a micro-CT scanner. Through image processing and analysis, variations in density, cell wall thickness and cell size in the foam were quantitatively explored. It is found that cells in the foam are not elongated in the thickness (or rise) direction of foam sheets, but rather equiaxed. Cell walls in the foam are significantly straight.
-
Improvement of thermal conductivity of rigid polyurethane foams with aluminum nitride filler Cell. Polym. (IF 1.6) Pub Date : 2021-01-21 Serife Akkoyun, Meral Akkoyun
The aim of this work is the fabrication of electrically insulating composite rigid polyurethane foams with improved thermal conductivity. Therefore, this study is focused on the effect of aluminum nitride (AlN) on the thermal and electrical conductivities of rigid polyurethane foams. For this purpose, aluminum nitride/rigid polyurethane composite foams were prepared using a three-step procedure. The
-
Influence of carbon nanotubes on the properties of biopolyol based polyurethane foams Cell. Polym. (IF 1.6) Pub Date : 2021-01-20 Rujuta Dhoke, Abhishek Ojha, Ashutosh Kr Chaudhary, RP Vijayakumar
Biopolyols were obtained from liquefaction of sugarcane bagasse and rice husk. Acid and hydroxyl numbers were determined for estimating the polyol value of the liquid products. These prepared biopolyols were mixed with the commercial polyol for the preparation of polyurethane foam (PU). To study the effects of biopolyol on properties of PU foam, various ratios of biopolyol to commercial polyol were
-
An in vitro evaluation on polyurethane foam sheets of the insertion torque, removal torque values, and resonance frequency analysis (RFA) of a self-tapping threads and round apex implant Cell. Polym. (IF 1.6) Pub Date : 2020-11-25 Margherita Tumedei, Adriano Piattelli, Antonello Falco, Francesco De Angelis, Felice Lorusso, Maristella Di Carmine, Giovanna Iezzi
The dental implant primary stability and micromovement absence represent critical factor for dental implant osseointegration. The aim of the present in vitro investigation was to simulate the bone ...
-
Foaming behavior of 1-vinyl-2-pyrrolidone–methyl methacrylate copolymers under ScCO2 Cell. Polym. (IF 1.6) Pub Date : 2020-08-04 Miriam Trigo-López, José A Reglero Ruiz, Saúl Vallejos, Cipriano Ramos, Sagrario Beltrán, Félix C García, José M García
We report on the preparation, characterization, and foaming behavior of cellular polymers based on 1-vinyl-2-pyrrolidone (VP) and methyl methacrylate (MMA). Samples with different feed ratios proportions of VP and MMA were prepared following the bulk radical copolymerization procedure, using commercially available monomers and testing two different initiators (photochemical and thermal), obtaining
-
Achievements and prospects for the synthesis of poly(meth)acrylimide foams. Stage of the thermal imidisation of polymer precursors Cell. Polym. (IF 1.6) Pub Date : 2020-07-01 Oleg A Kazantsev, Konstantin V Shirshin, Pavel V Kornienko, Alexey P Sivokhin
The review summarises the trends in the development of research on the synthesis of polymethacrylimides (PMIs) and polyacrylimides by the method of intramolecular thermal imidisation of (meth)acrylic polymers. Along with the widely used industry variant of PMI foam of the ‘Rohacell’ series based on bulk copolymers of methacrylonitrile and methacrylic acid, intensive research on alternative variants
-
Thermal conductivity and conditioning of grey expanded polystyrene foams Cell. Polym. (IF 1.6) Pub Date : 2020-06-26 A Simpson, IG Rattigan, E Kalavsky, G Parr
This article focuses on the thermal conductivity of 50 mm thick silver grey (infrared absorbing) expanded polystyrene (EPS) foam boards blown with pentane. The effect of short-term ageing from the point of production, by ambient conditioning at 23°C/50% RH, is compared to conditioning at an elevated temperature of 70°C. The declared thermal properties of the product and CE certification are fulfilled
-
Gas transport properties of cellular hollow fiber membranes based on LLDPE/LDPE blends Cell. Polym. (IF 1.6) Pub Date : 2020-06-10 Zahir Razzaz, Abolfazl Mohebbi, Denis Rodrigue
The production of foamed hollow fiber membranes (HFMs) is presented based on polymer blends using various concentrations of linear low-density polyethylene (LLDPE) and low-density polyethylene (LPD...
-
Cell structure and mechanical properties of microcellular PLA foams prepared via autoclave constrained foaming Cell. Polym. (IF 1.6) Pub Date : 2020-06-05 Jinwei Chen, Ling Yang, Dahua Chen, Qunshan Mai, Meigui Wang, Lixuan Wu, Ping Kong
Microcellular polylactic acid (PLA) foams with various cell size and cell morphologies were prepared using supercritical carbon dioxide (sc-CO2) solid-state foaming to investigate the relationship ...
-
Preparation and properties of melamine-formaldehyde rigid closed-cell foam toughened by ethylene glycol/carbon fiber Cell. Polym. (IF 1.6) Pub Date : 2020-06-04 Chunhui Li, Haihong Ma, Zhengfa Zhou, Weibing Xu, Fengmei Ren, Xinyuan Yang
Toughing melamine-formaldehyde (MF) rigid closed-cell foams were prepared by using ethylene glycol (EG) and carbon fiber (CF) as composite toughening agents. The pulverization rate, compressive str...
-
Air inclusions in the polymer melt functioning as intrinsic physical blowing agents for the generation of foams in rotational molding Cell. Polym. (IF 1.6) Pub Date : 2020-04-23 Jannik Werner, Lukas Vetter, Sebastian Hertle, Michael Wolf, Dietmar Drummer
In recent years, foams have experienced a major economic uprise, not least due to their lightweight construction potential. In this article, a new process variation is presented, which enables the ...
-
Crystallization-induced microcellular foaming behaviors of chain-extended polyethylene terephthalate Cell. Polym. (IF 1.6) Pub Date : 2020-04-22 Can Jiang, Shuo Han, Shihong Chen, Hongfu Zhou, Xiangdong Wang
The microcellular foaming of chain-extended polyethylene terephthalate (CPET) by crystallization induction method was reported in this article. The crystallization behaviors of various polyethylene terephthalate (PET) samples which were affected by the combined effect of pyromellitic dianhydride, Surlyn, and CO2 were investigated. After Surlyn was added to CPET, the crystal nucleation of various CPET
-
Fabrication of poly (lactic acid) foams using supercritical nitrogen Cell. Polym. (IF 1.6) Pub Date : 2020-03-30 Fatemeh Farhanmoghaddam, Azizeh Javadi
In this article, poly (lactic acid) (PLA) was foamed via batch foaming using supercritical nitrogen as a physical blowing agent by two methods, conventional foaming process (CFP) and low-temperature foaming process (LTFP). The fabrication processes, cell morphologies, thermal properties, crystallization behavior, and electrical resistance of resulted foams were studied to investigate the effect of
-
Preparation and characterization of PLA foam chain extended through grafting octa(epoxycyclohexyl) POSS onto carbon nanotubes Cell. Polym. (IF 1.6) Pub Date : 2020-03-19 Wei Liu, Xunxian Zhu, Hongxiang Gao, Xiangdong Su, Xian Wu
Improving foamability of poly (lactic acid) (PLA) resin is a key issue for its critical foaming applications with high-performance and ultralow density. However, owing to the rheological nature of linear PLA chain structure with relatively low molecular weight, the overall foamability of PLA resin cannot meet the processing requirements of foaming purpose. Here, we describe a simple and versatile technique
-
Synergetic effect of nanoclay and nano-CaCO3 hybrid filler systems on the foaming properties and cellular structure of polystyrene nanocomposite foams using supercritical CO2 Cell. Polym. (IF 1.6) Pub Date : 2020-01-22 Xinghan Lian, Wenjie Mou, Tairong Kuang, Xianhu Liu, Shuidong Zhang, Fangfang Li, Tong Liu, Xiangfang Peng
Supercritical fluids have been widely used to prepare various polymer nanocomposite foams due to their high-efficiency, rich-resource, and environment-friendly characteristics. In this work, we prepared polystyrene (PS) nanocomposites with different contents of hybrid fillers of nanoclay and nano-calcium carbonate (nano-CaCO3) and then were foamed by batch foaming method using supercritical carbon
-
Production and characterization of fully biobased foamed films based on gelatin Cell. Polym. (IF 1.6) Pub Date : 2020-01-07 Javier Solorza-Feria, Maria Alejandra Ortiz-Zarama, Antonio Jimenez-Aparicio, Denis Rodrigue
The objective of this study was to produce and characterize gelatin foamed films using extrusion. Three “optimum” formulations containing tannic acid, nanoclays (Cloisite Na+), glycerol, water, and gelatin, as well as three “controls” without tannic acid and nanoclays were prepared by calendering. Furthermore, the three “optimum” formulations were produced by extrusion film blowing only, since no stable
-
Morphological evaluation of ultralow density microcellular foamed composites developed through CO2-induced solid-state batch foaming technique utilizing water as co-blowing agent Cell. Polym. (IF 1.6) Pub Date : 2019-12-31 Rupesh Dugad, G Radhakrishna, Abhishek Gandhi
In this work, microcellular acrylonitrile-butadiene-styrene foams were developed with utilization of water as a co-blowing agent and CO2 as the primary blowing agent through the solid-state batch foaming process. The effect of saturation parameters with the content of the co-blowing agent has been studied extensively for various foaming attributes. The co-blowing agent enhanced the average cell size
-
The effects of filler contents and particle sizes on properties of green kenaf-filled natural rubber latex foam Cell. Polym. (IF 1.6) Pub Date : 2019-11-29 Siti Nurul Izzati Kudori, Hanafi Ismail
The effects of filler loading and size of kenaf fibre on the mechanical properties of kenaf fibre-filled natural rubber latex foam (NRLF) have been studied. The NRLF was prepared by using the Dunlop method. The kenaf fibre was sieved to 97, 144 and 200 µm particle sizes and incorporated into the rubber vulcanizates at 0, 1, 3, 5 and 7 part per hundred rubber fibre contents. Increasing kenaf fibre loading
-
Analysis of static sealing rules of foamed silicone rubber based on a porous media model Cell. Polym. (IF 1.6) Pub Date : 2019-11-22 Tianzheng Wen, Fei Guo, Yijie Huang, Shixing Zhu, Xiaohong Jia
We established a method for calculating and analyzing the static leakage rate based on a porous media model for foamed silicone rubber materials. The mechanical properties of the foamed silicone rubber material under macroscopic compression were described by the Ogden third (foam) model in the finite-element hyperelastic model. It solved the problem of difficult convergence of large compressible and
-
Novel 3-D hierarchical multiconfiguration graphene/polyaniline-based aerogels with directed higher performances Cell. Polym. (IF 1.6) Pub Date : 2019-10-31 Rui Yao, Jinshan Ju, Zhengjun Yao
Novel three-dimensional (3-D) hierarchical multiconfiguration graphene/polyaniline-based aerogels were synthesized via in situ polymerization and directed freeze-drying method. The composite aerogels enhanced excellent thermal and electrical performances, at the same time, their 3-D hierarchical multiconfiguration was robust and stable, which made them more beneficial to be applied to thermal or electrical
-
Effect of PBAT on physical, morphological, and mechanical properties of PBS/PBAT foam Cell. Polym. (IF 1.6) Pub Date : 2019-09-19 Aekartit Boonprasertpoh, Duanghathai Pentrakoon, Jirawut Junkasem
This study examines the effect of poly(butylene adipate-co-terephthalate) (PBAT) content on the physical, morphological, and mechanical properties of poly(butylene succinate) (PBS)/PBAT foam. A compression molding technique was used to prepare the PBS/PBAT foam using the chemical blowing agent azodicarbonamide and the cross-linking agent dicumyl peroxide. The chemical structure and morphological properties
-
The influence of blowing agent addition, talc filler content, and injection velocity on selected properties, surface state, and structure of polypropylene injection molded parts Cell. Polym. (IF 1.6) Pub Date : 2019-09-15 Paweł Palutkiewicz, Milena Trzaskalska, Elżbieta Bociąga
The effects of blowing agent, talc, and injection velocity on properties of polypropylene molded parts were presented. Blowing agent was dosed to plastic in amounts 1–2% and talc 10–20%. The results of selected properties, such as weight, thickness, hardness, impact strength, tensile strength, and gloss, were presented. The article also presents microscopic investigations. The blowing agent and talc
-
Added-value porous materials for controlled thymol release obtained by supercritical CO2 impregnation process Cell. Polym. (IF 1.6) Pub Date : 2019-09-01 Stoja Milovanovic, Darka Markovic, Jasna Ivanovic
This study explores utilization of biodegradable and biocompatible polymers for controlled release of natural bioactive substance. For that purpose, poly(ε-caprolactone) (PCL) beads, cellulose acetate (CA) film, and poly lactic-co-glycolic acid (PLGA) flakes were impregnated with thymol by employing environmentally friendly process of supercritical carbon dioxide (scCO2) impregnation. At selected pressure
-
Injection-molded lightweight and high electrical conductivity composites with microcellular structure and hybrid fillers Cell. Polym. (IF 1.6) Pub Date : 2019-09-01 Sheng Tian, Binbin Dong, Yahao Guo, Can Zhao, Mengxia Zhang, Mengjun Xiao
Polypropylene/carbon black (PP/CB) and PP/CB/multiwalled carbon nanotube (PP/CB/MWCNT) composites were fabricated by solid and foam injection molding, with the goal of enhancing the electrical conductivity of the composites while decreasing the cost of the final product. The foaming behavior and through-plane (T-P) electrical conductivity of the composites were characterized and analyzed. Cell growth
-
Effects of dynamic mold temperature control on melt pressure, cellular structure, and mechanical properties of microcellular injection-molded parts: An experimental study Cell. Polym. (IF 1.6) Pub Date : 2019-08-29 Guiwei Dong, Guoqun Zhao, Junji Hou, Guilong Wang, Yue Mu
In this work, the effects of dynamic mold temperature control (DMTC) on melt pressure, cellular structure, and mechanical properties of microcellular injection molding (MIM)-molded parts are investigated experimentally. It is found that with the increase of the mold temperature, the duration of foaming pressure in the cooling stage increases. Meanwhile, the average cell diameter and cell diameter dispersion
-
The foaming performance evaluation of fibrillated polytetrafluoroethylene and isotactic polypropylene blends Cell. Polym. (IF 1.6) Pub Date : 2019-05-01 Yun Zhang, Chunling Xin, Zeming Wang, Waqas Mughal, Yadong He
Polypropylene (PP) foamed products have the advantages of heat and chemical resistance, but it is difficult to foam without modified PP. Traditionally, researchers have used chemical modification to increase the melt strength to improve the foaming properties of PP. In this article, we designed four kinds of screw combinations, and five regions are selected for sampling. The polytetrafluoroethylene
-
Microcellular morphology evolution of polystyrene/thermoplastic polyurethane blends in the presence of supercritical CO2 Cell. Polym. (IF 1.6) Pub Date : 2019-05-01 Zhongjie Qu, Jianguo Mi, Yang Jiao, Hongfu Zhou, Xiangdong Wang
In this article, a facile melt blending and solid batch foaming approach was proposed to prepare microcellular polystyrene/thermoplastic polyurethane (PS/TPU) blending foams with supercritical carbon dioxide (CO2). Compared with those of pure PS and pure TPU, an interesting phenomenon about the enhanced complex viscosity and storage modulus, as well as decreased loss factor of PS/TPU blends, was found
-
Effect of acrylonitrile–butadiene–styrene terpolymer on the foaming behavior of polypropylene Cell. Polym. (IF 1.6) Pub Date : 2019-05-01 Xiao-Tian Tan, Ying-Guo Zhou, Jing-Jing Zhou, Bin-Bin Dong, Chun-Tai Liu, Bai-Ping Xu
To improve the cellular foam structure of common polypropylene (PP), acrylonitrile–butadiene–styrene terpolymer (ABS) and compatibilizer were used to blend with PP, and the foaming behavior of PP/ABS blends was investigated. The solid and foamed samples of the PP/ABS blend with different component were first fabricated by melt extrusion followed by conventional injection molding with or without a blowing
-
Density graded polyethylene foams: Effect of processing conditions on mechanical properties Cell. Polym. (IF 1.6) Pub Date : 2019-01-01 E Cusson, AH Akbarzadeh, D Therriault, D Rodrigue
Uniform foams (UF) and density graded foams (DGF) were produced by using similar or different temperatures on both sides of a compression molding system. The samples were produced using linear low density polyethylene as the matrix and activated azodicarbonamide as the chemical blowing agent. Morphological properties of the produced samples were analyzed via scanning electron microscopy to relate them
-
Evaluation of PVA/dextran/chitosan hydrogel for wound dressing Cell. Polym. (IF 1.6) Pub Date : 2019-01-01 Shin-Ping Lin, Kai-Yin Lo, Tien-Ni Tseng, Jui-Ming Liu, Ting-Yu Shih, Kuan-Chen Cheng
Developing a multiple functional wound dressing suitable for different stages of wound healing is important for patients with special wound such as burn or decubital ulcers. In this study, poly (vinyl alcohol) (PVA), dextran, and chitosan are integrated to produce ideal wound dressing where glutaraldehyde (GA) is used as the cross-linker. The result demonstrated that 6% PVA hydrogel with 0.25% chitosan
-
The effect on the surface activity and the structure of SPI caused by cleavage of disulfide bonds and by subsequent glucose modification Cell. Polym. (IF 1.6) Pub Date : 2019-01-01 Fan Junfu, Li Junsheng, Wang Bixuan, Zhong Xin, Huang Guoxia, Yan Liujuan, Ren Xiane
The main purpose of this study was to investigate the effects on the molecular structure and the properties of soybean proteins isolate (SPI) after two modifications: (1) peracetic acid oxidative cleavage of its disulfide bonds and (2) the subsequent addition of covalently bonded glucose to the SPI containing the cleaved disulfide bonds. An appropriate amount of peracetic acid will be capable of enhancing