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Morphology and properties of PC/ABS notebook computer shell prepared by a combined in-mold decoration and microcellular injection molding process J. Cell. Plast. (IF 2.5) Pub Date : 2024-02-20 Yuemei Lu, Jianren Liu, Liandeng Wang
In this paper, the PC/ABS notebook computer shells with PET film were prepared using a combined in-mold decoration and microcellular injection molding (IMD/MIM) process. Then the surface quality, morphology, impact toughness and wear resistance were investigated. The results shown that the surface quality is improved by IMD/MIM technology. The three dimensional surface roughness value (Sa) was about
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Photodegradation resistance and flammability of bio-based wood-nanoclay-polyurethane foam nanocomposites J. Cell. Plast. (IF 2.5) Pub Date : 2024-02-20 Andrey Pereira Acosta, Jalel Labidi, Arthur Behenck Aramburu, Sandro Campos Amico, Darci Alberto Gatto, Rafael de Avila Delucis
Rigid polyurethane foams (RPUF) filled with lignocellulosic fillers have gained considerable interest due to their mechanical performance and eco-friendly characteristics. However, their flammability and photodegradation resistance properties still need further improvement, which may be achieved by incorporating various particles. This study investigated the effect of adding 2.5% of wood flour and
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Rowanberry/vermiculite modified rigid polyurethane foams J. Cell. Plast. (IF 2.5) Pub Date : 2024-02-10 Karolina Miedzińska, Sylwia Członka, Agnė Kairytė, Krzysztof Strzelec, Anna Strąkowska
Rigid polyurethane (PU) foams were modified with rowanberry/vermiculite fillers. The impact of fillers on selected properties of composites, such as rheological properties (dynamic viscosity, foaming behavior), mechanical properties (compressive and flexural strength, toughness), thermal properties (temperature of thermal decomposition stages, char residues at 600°C), flame retardancy (ignition time
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Calculating diffusion coefficients from molecular dynamics simulations for modelling foam processes of polypropylene: Investigating different process conditions and blowing agents J. Cell. Plast. (IF 2.5) Pub Date : 2024-01-13 Felix Melzer, Robert Breuer, Rainer Dahlmann, Christian Hopmann
The choice of blowing agent is very important in foaming processes. In an earlier work the use of molecular dynamics simulations for the estimation of the diffusion coefficients of different blowing agents was discussed at elevated temperatures above the melting point. Therein it was shown that these simulations can give valuable information on blowing agent diffusion in polypropylene. The aim of the
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Modeling hysteresis in expanded polystyrene foams under compressive loads using feed-forward neural networks J. Cell. Plast. (IF 2.5) Pub Date : 2023-05-16 Alejandro E Rodríguez-Sánchez, Héctor Plascencia-Mora
Expanded polystyrene foams are widely used materials for various applications in engineering, including their use for protective designs. For this type of application, in engineering analysis and d...
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Investigation of the mechanical properties triple periodic minimal surfaces lattice structures with functional graded of porosity J. Cell. Plast. (IF 2.5) Pub Date : 2023-05-02 Ender Emir, Erkan Bahçe
In recent years, triple periodic minimal surfaces (TPMS) have attracted attention in many applications such as biomaterials, aerospace, defense industry etc. lightweight components with high streng...
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Analysis of density-dependent bead and cell structure of expanded polypropylene bead foams from X-ray computed tomography of different resolution J. Cell. Plast. (IF 2.5) Pub Date : 2023-03-31 Ilja Koch, Gina Preiß, Michael Müller-Pabel, Bernd Grüber, Johannes Meuchelböck, Holger Ruckdäschel, Maik Gude
Closed-cell bead foams with their hierarchical geometrical structure are a challenge for statistical reconstruction and finite element modelling. For the purpose of providing the fundamental micro-...
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Foaming epoxy-amine-carbamate: The effect of different neat amines on rheological and cellular morphology J. Cell. Plast. (IF 2.5) Pub Date : 2023-03-23 Ngoc Uy Lan Du, Christian Bethke, Shuaiping Gong, Volker Altstaedt, Holger Ruckdaeschel
The use of carbamate to foam epoxy depends significantly on the precured modulus to stabilize the cellular structure. The optimum precured modulus is developed from the reaction of epoxy resin and ...
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Investigation into the effects of foaming variables on the cellular structure and expansion ratio of foamed TPU using response surface methodology J. Cell. Plast. (IF 2.5) Pub Date : 2023-03-16 Jiankang Wang, Houjian Fa, Hongwei Lu
Thermoplastic polyurethane elastomer (TPU) foams were prepared using the high-pressure autoclave with supercritical fluid carbon dioxide (SC-CO2). The effects of foaming variables (i.e. saturation ...
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Development and characterization of sandwich panels for thermal insulation in a cold storage chamber J. Cell. Plast. (IF 2.5) Pub Date : 2023-03-08 Ana P Sartori, Heitor L Ornaghi Junior, Nayrim B Guerra, Paulo R Wander, Marcelo Giovanela, Regina C Reis Nunes, Janaina da Silva Crespo
Sandwich composites are materials that have superior properties including low weight, high impact energy absorption and high thermal insulation features, compared to conventional materials. In this...
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Directing the pore size of rigid polyurethane foam via controlled air entrainment J. Cell. Plast. (IF 2.5) Pub Date : 2023-02-24 Martin Hamann, Sébastien Andrieux, Markus Schütte, Daniel Telkemeyer, Meik Ranft, Wiebke Drenckhan
The interest in polyurethane rigid (PUR) foams as potent thermally insulating materials for a wide range of applications continues to grow as the minimization of CO2 emissions has become a global i...
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Morphological and mechanical properties of foamed thick-walled Wood-Plastic-Composite structures J. Cell. Plast. (IF 2.5) Pub Date : 2023-02-23 Elmar Moritzer, Felix Flachmann
Microcellular wood fiber reinforced polymers offer the possibility to reduce the use of fossil raw materials. In particular, thick-walled structures with thicknesses greater than 6 mm offer a high ...
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Preparing low-Density microcellular polystyrene foam by in-Situ fibrillated PTFE and supramolecular nucleator TMC-300 in the presence of sc-CO2 J. Cell. Plast. (IF 2.5) Pub Date : 2023-02-13 Zhuolun Li, Xiangdong Wang, Yaqiao Wang, Shihong Chen
A method using in-situ fibrillated polytetrafluoroethylene (PTFE) and octamethylenedicarboxylicdibenzoylhydrazide (TMC-300) supramolecular nucleator was presented to prepare low density polystyrene...
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Quasi-static indentation damage mechanics of PU foam core reinforced with fly ash particulate J. Cell. Plast. (IF 2.5) Pub Date : 2023-01-27 Ashish Singh Pareta, PK Singh, Arnab Sarkar, SK Panda
The fly ash (FA) particulates are used in this study to reinforce the polyurethane foam (PUF) core. The FA particles inclusion improves the mechanical performance of the PUF core under compression ...
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Autoclave foaming and steam-chest molding of polypropylene/polybutene-1 blend bead foams and their crystallization and mechanical properties J. Cell. Plast. (IF 2.5) Pub Date : 2023-01-10 Xiaoqin Lan, Pengke Huang, Yunkai Chong, Fei Wu, Yaozhuo Su, Haibin Luo, Partrick C Lee, Wenge Zheng
Expanded polypropylene (EPP) foams have showed wide applications in our daily life, such as automotive and packaging. Usually, autoclave foaming combined with steam-chest molding is the main artwor...
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Developing an adaptive FE model to reflect the effective mechanical properties in porous elastomeric materials J. Cell. Plast. (IF 2.5) Pub Date : 2022-12-24 Ali Reza Nazari, Mehdi Khanzadeh-Moradllo
Simulation of the microstructure of materials is not usually an efficient approach to estimate the mechanical response in the macro-scale porous components. This paper establishes an adaptive numer...
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Investigation of the relation between free volume and physico-mechanical performance in rigid polyurethane foam containing turkey feather fibers: Part 2 J. Cell. Plast. (IF 2.5) Pub Date : 2022-12-06 Ugur Soykan, Mustafa Khaleel, Sedat Cetin, Ugur Yahsi, Cumali Tav
Rigid polyurethane foams (RPUFs) were modified with 0–15 wt.% turkey feather fibers (TFFs) produced from waste turkey feathers. One-shut free rising method was used for the production of TFFs-fille...
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Glass transition of PLA-CO2 mixtures after solid-state saturation J. Cell. Plast. (IF 2.5) Pub Date : 2022-12-06 Christian Brütting, Julia Dreier, Christian Bonten, Volker Altstädt, Holger Ruckdäschel
Polymer foams offer high sustainable performance in terms of their lightweight potential, insulation and high specific mechanical properties. The foaming of polymers depends on the properties of ga...
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Emerging trends in flame retardancy of rigid polyurethane foam and its composites: A review J. Cell. Plast. (IF 2.5) Pub Date : 2022-12-01 Abdulwasiu Muhammed Raji, Hambali Umar Hambali, Zahid Iqbal Khan, Zurina Binti Mohamad, Hassan Azman, Raphael Ogabi
Owing to the superior thermal insulating attributes of rigid polyurethane foam (RPUF) compared to other insulating materials (expanded and extruded polystyrene, mineral wool), it remains the most d...
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Effect of the pH value of tannin extracts on properties of classic tannin foams J. Cell. Plast. (IF 2.5) Pub Date : 2022-12-01 Pedro Jorge Goes Lopes, Camila Berger, Henrique Weber Dalla Costa, Rodrigo Coldebella, Alencar Ibeiro de Oliveira, Nayara Lunkes, Darci Alberto Gatto, Rafael de Avila Delucis, André Luiz Missio
Natural tannin-based foams are three-dimensional porous materials. Many different formulations have been investigated in order to reach foams with improved performance and increased commercial attr...
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A quantitative study of the allophanate formation reaction in PIR foams by FT-IR spectroscopy J. Cell. Plast. (IF 2.5) Pub Date : 2022-11-23 Vadim V Zharkov, Ruslan R Vlasov
The method for determining the concentrations of the main functional groups in rigid polyisocyanurate (PIR) foams was developed using ATR-FTIR spectroscopy. On the example of a series of rigid PIR ...
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Effect of microcrystalline cellulose on the preparation and performance of rigid polyurethane foam J. Cell. Plast. (IF 2.5) Pub Date : 2022-08-22 Ye Liu, Xujian Chen, Jin Pan, Yong Guan, Zheng Anna, Dafu Wei, Xiang Xu
In order to study the effect of microcrystalline cellulose on the reaction kinetics of polyurethane, in this work, the multi-scale microcrystalline cellulose was added to the foaming system of mult...
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Effect of reduction time of functionalized graphene oxide on the morphology and properties of epoxy composite foams J. Cell. Plast. (IF 2.5) Pub Date : 2022-07-13 Bangli Yang, Lilu zhou, Qiaohui Liu, Lijun Wang
In this study, N-aminoethylpiperazine (AEP)-functionalized and reduced graphene oxide (RGO) with different structures and properties was prepared by simply tuning the reduction time and then its ef...
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ɛ-caprolactone and pentaerythritol derived oligomer for rigid polyurethane foams preparation J. Cell. Plast. (IF 2.5) Pub Date : 2022-07-11 Małgorzata Walczak, Jacek Lubczak
Copolymerization of pentaerythritol with five equivalents of ɛ-caprolactone leads to tetra-functional branched oligomer terminated with hydroxyl groups. The product was characterized by elemental a...
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Gelatin-based cellular solids: Fabrication, structure and properties J. Cell. Plast. (IF 2.5) Pub Date : 2022-07-03 Virginia Martin Torrejon, Jim Song, Zhang Yu, Song Hang
Although most cellular polymers are made from thermoplastics using different foaming technologies, gelatin and many other natural polymers can form hydrogels and convert them to cellular solids usi...
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Application of computed tomography data–based modelling technique for polymeric low density foams, Part B: Characterization of the mechanical behaviour J. Cell. Plast. (IF 2.5) Pub Date : 2022-06-13 Anna Hössinger-Kalteis, Martin Reiter, Michael Jerabek, Zoltán Major
The non-linear material behaviour of low density polypropylene foams is investigated under several quasi-static loading conditions with a combined modelling technique based on computed tomography d...
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Enhancement of the mechanical and acoustical properties of flexible polyurethane foam/waste seashell composites for industrial applications J. Cell. Plast. (IF 2.5) Pub Date : 2022-05-16 AA Maamoun, AA El-Wakil, Tarek M El-Basheer
The importance of this work is the use of waste seashells WSS (5, 10, 15, 20, 25, and 30 wt.%) as a bio-filler to enhance the mechanical and acoustical characteristics of flexible polyurethane foam...
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A simple preparation of low water-soluble crosslinking starch-based foam containing palm oil: Thermo-physicochemical properties J. Cell. Plast. (IF 2.5) Pub Date : 2022-04-27 Thapanee Wongpreedee, Thidatip Panrot, Porntip Rojruthai, Chana Prapruddivongs
A simple preparation method was established for a low water-soluble citric acid crosslinking starch-based foam containing palm oil. The method was performed by pouring the boiling citric acid solut...
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Progress in the development of bead foams – A review J. Cell. Plast. (IF 2.5) Pub Date : 2022-04-25 Justus Kuhnigk, Tobias Standau, Dominik Dörr, Christian Brütting, Volker Altstädt, Holger Ruckdäschel
For a long time, the number of available bead foam variants limited to standard polymers which restricted their functionality mainly to packaging, thermal insulation (e.g. in construction) and shoc...
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Physical and mechanical properties of hybridized elastomeric foam based on ethylene-propylene-diene-monomer, multiwall carbon nanotube, and barium titanate J. Cell. Plast. (IF 2.5) Pub Date : 2022-04-23 Hasti Bizhani, Ali Asghar Katbab, Mahshid Maroufkhani, Raquel Verdejo
The use of hybrid fillers in rubbers can provide additional benefits to rubber foams compared to individual micro- or nano-scale particles due to an optimum packaging and synergic effects. The pres...
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Microcellular foams production from nanocomposites based on PS using MOF nanoparticles with enhanced CO2 properties as nucleating agent J. Cell. Plast. (IF 2.5) Pub Date : 2022-04-21 Daniel Cuadra-Rodríguez, Xiao-Lin Qi, Suset Barroso-Solares, Miguel Ángel Rodríguez Pérez, Javier Pinto
The use of metal-organic frameworks (MOF) nanoparticles as nucleating agents in gas dissolution foaming processes is presented. In this work, MOF nanoparticles with three different particle sizes w...
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Calculating diffusion coefficients from molecular dynamics simulations for foam extrusion modelling of polypropylene with CO2, N2 and ethanol J. Cell. Plast. (IF 2.5) Pub Date : 2022-04-14 Felix Melzer, Robert Breuer, Rainer Dahlmann, Christian Hopmann
In foaming processes, the blowing agent has a significant influence on the material behaviour and the necessary processing parameters. Low-density polypropylene foam sheets are usually produced with aliphatic hydrocarbons or alkanes as physical blowing agent. Due to the necessary safety precautions and the environmental impact, there is great interest in using alternative blowing agents such as CO2
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Extensional rheology and CO2 foaming of thermoplastics vulcanizates: Influence of the crosslinking chemistry J. Cell. Plast. (IF 2.5) Pub Date : 2022-03-22 Benoit Rainglet, Cindy Le Hel, Yvan Chalamet, Véronique Bounor-Legaré, Charlène Forest, Philippe Cassagnau
The objective of this study is to investigate the ability of thermoplastic vulcanizates (TPVs) (materials based on PP/EPDM blend) to foam under CO2 batch conditions. The EPDM phase, which is dispersed into the PP phase, was dynamically crosslinked either by a phenolic resin (Resol) or by a radical peroxide (dicumyl peroxide). The results show an influence of the crosslinking chemistry on the extensional
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Green rigid polyurethane foam from hydroxyl liquid natural rubbers as macro-hydroxyl polyols J. Cell. Plast. (IF 2.5) Pub Date : 2022-03-01 Jareerat Ruamcharoen, Chor Wayakron Phetphaisit, Polphat Ruamcharoen
The novel renewable source precursors from hydroxyl liquid natural rubbers (HLNRs) with various secondary hydroxyl content of 22% (HLNR22), 35% (HLNR35), and 50% (HLNR50) (or naming macro-hydroxyl polyols) were used to prepare rigid polyurethane foam. The aim of this study was to investigate the effect of hydroxyl content of HLNR precursors and the ratio of HLNRs and commercial polyols on physico-mechanical
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A modified three rail shear test procedure for rigid foamed materials J. Cell. Plast. (IF 2.5) Pub Date : 2022-02-28 Melis Taskin, Tugce Sargin, Raphiq Aliyev, Izzet U Cagdas
In this study, a modified three rail shear test (or double shear test) procedure is described for the determination of the shear moduli and the shear strength values of rigid foamed materials and test results are presented for light extruded polystyrene, which is a typical core material used in sandwich construction. The main idea is to obtain a nearly uniform shear stress distribution in the shear
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Colour of polyurethane foams filled with wood and wood derivatives exposed to two xylophagous fungi J. Cell. Plast. (IF 2.5) Pub Date : 2022-02-28 Arthur B Aramburu, Arthur B Guidoti, Diemis M Schneider, Nidria D Cruz, Rafael de Avila Delucis
This study addresses changes in aesthetical features of bio-based polyurethane (PU) foams filled with four forest-based particles (namely wood flour, wood bark, kraft lignin, and paper sludge), which were decayed by two wood-rot fungi. White-rot and brown-rot fungi were inoculated on these foams and further characterization results were obtained using colourimetric parameters measured according to
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Predicting mechanical performance of starch-based foam materials J. Cell. Plast. (IF 2.5) Pub Date : 2022-02-23 Yun Zhang, Xiaojie Xu
Variations in mixture proportions of plasticizers, additives, and crosslinking agents have significant impacts on mechanical performance of starch-based foam materials. In particular, starch/ethylene-vinyl acetate (EVA) foam materials have been developed with improved mechanical strength by optimizing the formulation. There is a lack of numerical correlations that could help analyze the effects of
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Patents J. Cell. Plast. (IF 2.5) Pub Date : 2022-01-04
Inventor(s): Jessiman, A. W., Paulson, A. A., Mahoney, C. J., and White, J. S.
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Low density rigid polyurethane foam incorporated with renewable polyol as sustainable thermal insulation material J. Cell. Plast. (IF 2.5) Pub Date : 2022-01-04 Adnan Srihanum, Maznee TI Tuan Noor, Kosheela PP Devi, Seng Soi Hoong, Nurul H Ain, Norhisham S Mohd, Nik Siti Mariam Nek Mat Din, Yeong Shoot Kian
Palm olein-based polyol (PP) was used as a partial replacement for commercial sucrose/glycerine initiated polyether polyol (GP) for the production of low density rigid polyurethane foams (RPUFs). The hydroxyl value (OHV) of the GP was 380 mg KOH/g, whereas the OHV for PP was 360 mg KOH/g. The RPUFs were prepared by replacing the GP with PP up to 50 parts per hundred parts of polyols (pph). Characterisation
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Cryogenic thermal insulating and mechanical properties of rigid polyurethane foams blown with hydrofluoroolefin: Effect of perfluoroalkane J. Cell. Plast. (IF 2.5) Pub Date : 2021-12-28 Tae Seok Kim, Yeongbeom Lee, Chul Hyun Hwang, Kwang Ho Song, Woo Nyon Kim
The effect of perfluoroalkane (PFA) on the morphology, thermal conductivity, mechanical properties and thermal stability of rigid polyurethane (PU) foams was investigated under ambient and cryogenic conditions. The PU foams were blown with hydrofluorolefin. Morphological results showed that the minimum cell size (153 μm) was observed when the PFA content was 1.0 part per hundred polyols by weight (php)
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High performance biobased pour-in-place rigid polyurethane foams from facile prepared castor oil-based polyol: Good compatibility with pentane series blowing agent J. Cell. Plast. (IF 2.5) Pub Date : 2021-12-28 Ismail Omrani
In this paper, biobased and environmentally friendly rigid polyurethane foams (RPUF) from high hydroxyl value castor oil-based polyols have been prepared without the addition of petroleum-based polyols in the formulation. The new Biopolyol with high hydroxyl value was designed on the basis of the analysis of functionality, structure and hydroxyl value relation and synthesized directly from castor oil
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3D printed geometrically tessellated sheets with origami-inspired patterns J. Cell. Plast. (IF 2.5) Pub Date : 2021-12-22 Anastasia L. Wickeler, Hani E. Naguib
This study demonstrates that the impact energy absorption capabilities of flexible sheets can be significantly enhanced by implementing tessellated designs into their structure. Configurations of three tessellated geometries were tested; they included a triangular-based, a rectangular-based, and a novel square-based pattern. Due to their geometrical complexity, multiple configurations of these tessellations
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Application of computed tomography data–based modelling technique for polymeric low density foams, Part A: Model development J. Cell. Plast. (IF 2.5) Pub Date : 2021-06-28 Anna Hössinger-Kalteis, Martin Reiter, Michael Jerabek, Zoltán Major
In this research study, a methodology is introduced for generating finite element simulation models for low density closed cell foams based on computed tomography (CT) measurement results. Creating this kind of simulation models can be very expensive with regard to modelling and computational effort. Hence, a combined modelling technique based on CT data and Voronoi diagrams is developed that minimizes
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A machine learning approach to estimate the strain energy absorption in expanded polystyrene foams J. Cell. Plast. (IF 2.5) Pub Date : 2021-05-29 Alejandro E Rodríguez-Sánchez, Héctor Plascencia-Mora
Traditional modeling of mechanical energy absorption due to compressive loadings in expanded polystyrene foams involves mathematical descriptions that are derived from stress/strain continuum mechanics models. Nevertheless, most of those models are either constrained using the strain as the only variable to work at large deformation regimes and usually neglect important parameters for energy absorption
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Characteristics of pre-strained polyisocyanurate foam: Deformation recovery and compressive mechanical behavior at cryogenic temperature J. Cell. Plast. (IF 2.5) Pub Date : 2021-05-25 Seul-Kee Kim, Jeong-Dae Kim, Dong-Ha Lee, Jeong-Hyeon Kim, Jae-Myung Lee
In this study, mechanical characteristics of pre-strained polyisocyanurate foam were investigated based on the uniaxial compression test. The compression test procedure was divided into two steps: pre-straining and the typical compression test for the recovered specimen. To evaluate the effect of pre-straining, four different compressive strains were considered, and the temperature and the strain rate
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Solid-state foaming of acrylonitrile butadiene styrene through microcellular 3D printing process J. Cell. Plast. (IF 2.5) Pub Date : 2021-05-04 Rupesh Dugad, G Radhakrishna, Abhishek Gandhi
The lightweight products with superior specific strength are in great demand in numerous applications such as automotive, aerospace, biomedical, sports, etc. This work focussed on the manufacturing of lightweight products using the cellular three dimensional (3D) printing process. In this work, the continuous microcellular morphology has been developed in a single foamed filament using 3 D printing
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Morphological, thermal and mechanical properties of recycled HDPE foams via rotational molding J. Cell. Plast. (IF 2.5) Pub Date : 2021-04-29 Yao Dou, Denis Rodrigue
In this study, foamed recycled high density polyethylene (rHDPE) parts were produced by rotational molding using different concentration (0 to 1% wt.) of a chemical blowing agent (CBA) based on azodicarbonamide. From the samples produced, a complete morphological, thermal and mechanical characterization was performed. The morphological analysis showed a gradual increase in the average cell size, while
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Cellular Bi2O3/natural rubber composites for light-weight and lead-free gamma-shielding materials and their properties under gamma irradiation J. Cell. Plast. (IF 2.5) Pub Date : 2021-04-26 Phakamat Limarun, Teerasak Markpin, Narongrit Sombatsompop, Ekachai Wimolmala, Kiadtisak Saenboonruang
This work investigated the effects of a radiation-protective filler, namely bismuth oxide (Bi2O3), and blowing agents, namely azodicarbonamide (ADC) and oxy-bis (benzene sulfonyl) hydrazide (OBSH), on gamma attenuation and the mechanical, physical, and morphological properties of cellular natural rubber (NR) composites for potential use as light-weight and lead-free gamma-shielding materials. The contents
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Effect of tris(1-chloro-2-propyl)phosphate in combination with aluminum hypophosphite and melamine polyphosphate on flame retardancy and thermal decomposition of rigid polyurethane foams J. Cell. Plast. (IF 2.5) Pub Date : 2021-04-06 Daifang Xu, Kejing Yu, Kun Qian, Weiguo Zhao
RPUF with tris(1-chloro-2-propyl)phosphate (TCPP), melamine polyphosphate (MPP) and aluminum hypophosphite (AHP) alone, as well as their binary and ternary blends, were prepared via a one-step process. The effect of TCPP in combination with AHP and MPP on flame retardancy and thermal decomposition in the RPUF has been investigated. The results show that adding TCPP, MPP and AHP into RPUF simultaneously
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Evaluating the gas-laden ability of polymer melt under atmospheric conditions using a modified torque rheometer J. Cell. Plast. (IF 2.5) Pub Date : 2021-03-05 Xing-Yu Mei, Ying-Guo Zhou, Hong-Long Sun, Bin-Bin Dong, Chun-Tai Liu, Lih-Sheng Turng
To investigate the effects of incorporating gas and the associated influencing factors on polymer melt, a method of evaluating the gas-laden ability using modified rheometric measurements was proposed. In this study, common and widely used thermoplastic materials—polypropylene (PP) and high-density polyethylene (HDPE), and their blends with different weight ratios—were selected, and the rheological
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Melamine-formaldehyde rigid foams – Manufacturing and their thermal insulation properties J. Cell. Plast. (IF 2.5) Pub Date : 2021-02-27 Miha Kavšek, Nataša Figar, Igor Mihelič, Matjaž Krajnc
The manufacturing of novel melamine-formaldehyde rigid foam material, by blowing the melamine-formaldehyde (MF) resin emulsion with pentane and further catalytic and thermal curing, is presented in this work. The process of foaming is described in terms of particular process parameters, which are; the proportions of blowing, curing, emulsifying agents. The examination of the foam, by SEM images, shows
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Exfoliated two-dimensional molybdenum disulfide reinforced epoxy syntactic foams J. Cell. Plast. (IF 2.5) Pub Date : 2021-01-28 AV Ullas, D Kumar, PK Roy
In this paper, we report the effect of introducing molybdenum disulfide (MoS2) nano-platelets: a two-dimensional metal chalcogenide, on the mechanical properties of hollow glass microballoon (HGM)–epoxy syntactic foams. MoS2 reinforced syntactic foams were prepared by mixing MoS2 nanoplatelets to epoxy containing HGMs; with the amount of MoS2 being varied from 0.01 to 0.04% v/v, while maintaining a
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Eco-friendly composites of polyurethane and sheath palm residues J. Cell. Plast. (IF 2.5) Pub Date : 2021-01-19 Noelle C Zanini, Alana G de Souza, Rennan FS Barbosa, Derval S Rosa, Daniella R Mulinari
This work prepared eco-friendly biocomposites of polyurethane (PU) and sheath palm residues, using castor oil as a polyol. PU composites filled with natural fibers were prepared at different loading rates: 0 to 20 wt.%. Results indicated that the sheath palm was hydrogen-bonded to PU chains and increased the foams' density. Pore size decreased with an increase in fiber content, from 256 to 116 µm.
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The effect of organofluorine additives on the morphology, thermal conductivity and mechanical properties of rigid polyurethane and polyisocyanurate foams J. Cell. Plast. (IF 2.5) Pub Date : 2021-01-17 Cosimo Brondi, Ernesto Di Maio, Luigi Bertucelli, Vanni Parenti, Thomas Mosciatti
This study investigates the effect of liquid-type organofluorine additives (OFAs) on the morphology, thermal conductivity and mechanical properties of rigid polyurethane (PU) and polyisocyanurate (PIR) foams. Foams were characterized in terms of their morphology (density, average cell size, anisotropy ratio, open cell content), thermal conductivity and compressive as well as flexural properties. Based
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In situ synthesis of CO2 adducts of modified polyethylenimines in polyether polyols for polyurethane foaming J. Cell. Plast. (IF 2.5) Pub Date : 2021-01-11 Shuai Yuan, Yuanzhu Long, Xingyi Xie
CO2 adducts from hydrophobically-modified polyethylenimines (PEIs) in powder form are newly-developed environment-friendly blowing agents for polyurethanes (PUs). However, they are difficult to disperse into foaming systems that usually contain polyether polyols as the PU soft segments. Herein, we employ mixtures of di(propylene glycol) monomethyl ether-grafted polyethylenimines (DPG-PEIs) and poly(propylene
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Overview and comparison of modelling methods for foams J. Cell. Plast. (IF 2.5) Pub Date : 2020-12-15 Anna Hössinger-Kalteis, Martin Reiter, Michael Jerabek, Zoltán Major
Cellular materials, especially foams, are widely used in several applications because of their special mechanical, electrical and thermal properties. Their properties are determined by three factor...
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Effect of carbon allotropes on foam formation, cure characteristics, mechanical and thermal properties of NRF/carbon composites J. Cell. Plast. (IF 2.5) Pub Date : 2020-12-15 Pollawat Charoeythornkhajhornchai, Wutthinun Khamloet, Pattharawun Nungjumnong
Natural rubber composite foam with carbon such as carbon black (CB), carbon synthesized from durian bark (CDB), graphite (GPT), graphene oxide (GO), graphene (GPE) and multi-walled carbon nanotubes...
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Polyolefinic nanocomposite foams: Review of microstructure-property relationships, applications, and processing considerations J. Cell. Plast. (IF 2.5) Pub Date : 2020-12-15 Anish Kumar, Bhaskar Patham, Smita Mohanty, Sanjay Kumar Nayak
In this review, we survey the state of the art on polymeric foams incorporating nano-scale fillers. Particular focus of the review is on foams from polyolefinic nanocomposite formulations incorpora...
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Experimental and numerical study of the polyurethane foaming process using high-pressure CO2 J. Cell. Plast. (IF 2.5) Pub Date : 2020-12-08 Dongdong Hu, Chen Zhou, Tao Liu, Yichong Chen, Zhen Liu, Ling Zhao
A simulation of simultaneous bubble nucleation and growth was performed for polyurethane/CO2 physical foaming process. The single-factor and comprehensive effects of viscoelastic properties, Henry’...
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Effect of extrudate swell on extrusion foam of polyethylene terephthalate J. Cell. Plast. (IF 2.5) Pub Date : 2020-12-07 D Tammaro, C Walker, L Lombardi, U Trommsdorff
The effect of extrudate swell on extrusion foam of thermoplastic polymers is presented using an experimental approach supported by a modelling of the phenomenon. Its understanding is fundamental in...