Cellular Polymers最新文献_第5页

Phenolic syntactic foams: Low-density composites for structural and thermostructural applications 酚醛合成泡沫:用于结构和热结构应用的低密度复合材料

IF 1.6 4区医学

Cellular Polymers Pub Date : 2022-05-16 DOI: 10.1177/02624893221101147

B. John, CP Reghunadhan Nair

引用次数: 0

Synthesis and properties of foams from a blend of vegetable oil based polyhydroxyurethane and epoxy resin 植物油基聚羟基聚氨酯与环氧树脂共混泡沫的合成及性能研究

IF 1.6 4区医学

Cellular Polymers Pub Date : 2022-05-13 DOI: 10.1177/02624893221101170

Z. Ahmad, P. Mahanwar

{"title":"Synthesis and properties of foams from a blend of vegetable oil based polyhydroxyurethane and epoxy resin","authors":"Z. Ahmad, P. Mahanwar","doi":"10.1177/02624893221101170","DOIUrl":"https://doi.org/10.1177/02624893221101170","url":null,"abstract":"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 carbonate of castor oil at 120°C, 1 atm CO2 pressure and then it was reacted with three different aliphatic diamines to yield amine terminated Polyhydroxyurethane (PHU). Foams were prepared in a metal mould from the blend of PHU, epoxy resin, epoxy hardener and polymethylhydrogensiloxane blowing agent which releases hydrogen gas upon reaction with amine. FTIR and 1H NMR of cyclic carbonate of castor oil and PHU of castor oil were done to confirm their chemical structures. Optical microscopy and scanning electron microscopy of foams was done to assess their cellular morphology along with DSC and TGA to evaluate their thermal properties. Both flexible and rigid type of foams were synthesised in this study. Resilience of flexible foams was inspected using a ball rebound test and compression-recovery test while thermal insulation property was checked by measuring thermal conductivity, thermal diffusivity and R-values of rigid foams from heat transfer study using a heat transfer apparatus.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"41 1","pages":"163 - 186"},"PeriodicalIF":1.6,"publicationDate":"2022-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45797347","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Effect of strain rate and load orientation on cyclic response of anisotropic polyurethane foam 应变速率和载荷方向对各向异性聚氨酯泡沫循环响应的影响

IF 1.6 4区医学

Cellular Polymers Pub Date : 2022-04-13 DOI: 10.1177/02624893221084895

Dorra Ben Abdeljelil, S. Chatti, Raja O Ahmed Ben Ali

引用次数: 1

Micro foaming performance of scCO2-aid glutaraldehyde/hexametaphosphate/thermoplastic starch foams modified by alkali treatment and montmorillonite nano-platelets 碱处理和蒙脱土纳米片改性scco2助戊二醛/六偏磷酸酯/热塑性淀粉泡沫的微发泡性能

IF 1.6 4区医学

Cellular Polymers Pub Date : 2022-03-07 DOI: 10.1177/02624893211073539

Keng-ben Wang, Ya‐qiong Huang, Xiaoming Cheng, J. Yeh

{"title":"Micro foaming performance of scCO2-aid glutaraldehyde/hexametaphosphate/thermoplastic starch foams modified by alkali treatment and montmorillonite nano-platelets","authors":"Keng-ben Wang, Ya‐qiong Huang, Xiaoming Cheng, J. Yeh","doi":"10.1177/02624893211073539","DOIUrl":"https://doi.org/10.1177/02624893211073539","url":null,"abstract":"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 proper NaOH treatment. The expansion ratio, resilience rate, dynamic viscosity values of these NaOH modified foams improved to a maximum, as the time for NaOH treatment approached a proper value. The dynamic viscosity, expansion ratio and resilience rate of the scCO2-aid GA/SHMP/TOS foams modified using 110 atm scCO2-pressure, the proper alkali treatment time, SHMP loading and varying montmorillonite (MMT) loadings improved further, as their MMT loadings approached a proper value of 2.5 part per hundred parts of tapioca starch (PHTOS). Relatively large dynamic viscosity (7.1x104 Pa·s), extremely large expansion ratio (∼75), cell density (1.1x109 cells/cm3) and/or resilience rate (∼80%) were acquired for the scCO2-aid GA/SHMP/TOS/MMT foam modified using the proper alkali treatment time and MMT loading. Thermal analyses results showed that crystallization onset temperatures and crystallization rates of scCO2-aid GA/SHMP/TOS/MMT foams modified using the proper alkali treatment time and varying MMT loadings improved to a highest value by adding 2.5 PHTOS of MMT nano-platelets. Possible reasons accounting for the considerably improved micro foaming performance of scCO2-aid GA/SHMP/TOS/MMT foams modified using the proper alkali treatment time and MMT loading are proposed in this study.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"41 1","pages":"119 - 143"},"PeriodicalIF":1.6,"publicationDate":"2022-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46611982","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Fire retardancy, thermal, and physico-mechanical properties of semi-rigid water-blown polyurethane foam from palm oil-based polyol 棕榈油基多元醇制备的半刚性水吹聚氨酯泡沫的阻燃性、热性能和物理机械性能

IF 1.6 4区医学

Cellular Polymers Pub Date : 2022-02-23 DOI: 10.1177/02624893211061633

M. H. Dzulkifli, M. Yahya, R. A. Majid

引用次数: 2

Development and investigation of the applicability of computed tomography data-based modelling technique for polymeric high-density foams 基于计算机断层扫描数据的聚合物高密度泡沫建模技术的发展和适用性研究

IF 1.6 4区医学

Cellular Polymers Pub Date : 2021-12-23 DOI: 10.1177/02624893211061631

Anna Hössinger-Kalteis, M. Reiter, M. Jerabek, Z. Major

{"title":"Development and investigation of the applicability of computed tomography data-based modelling technique for polymeric high-density foams","authors":"Anna Hössinger-Kalteis, M. Reiter, M. Jerabek, Z. Major","doi":"10.1177/02624893211061631","DOIUrl":"https://doi.org/10.1177/02624893211061631","url":null,"abstract":"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 computed tomography (CT) measurements is developed. The model includes realistic microstructural features like cell size distribution due to the utilization of CT data. Moreover, a ‘skin-core-skin’ microstructure resulting from the manufacturing process (injection moulding) of the foams is also considered in the model. The mechanical behaviour of the foam’s core layer under tension and compression load is characterized based on the microstructural model to develop constitutive material models of the foam. These constitutive models enable further mechanical characterization of the foam with less computational effort. Compression and bending test simulations of injection moulded foams with three different densities are validated with corresponding experimental results. Thus, conclusions can be drawn regarding the reliability, applicability and possible further extensions of the high-density foam model.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"41 1","pages":"80 - 99"},"PeriodicalIF":1.6,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41430920","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of rare earth nucleating agent on supercritical CO2 foaming behavior of block copolymerized polypropylene 稀土成核剂对嵌段共聚聚丙烯超临界CO2发泡行为的影响

IF 1.6 4区医学

Cellular Polymers Pub Date : 2021-11-14 DOI: 10.1177/02624893211053678

Yun Zhang, Yadong He, C. Xin, Yan-Qun Su

{"title":"Effect of rare earth nucleating agent on supercritical CO2 foaming behavior of block copolymerized polypropylene","authors":"Yun Zhang, Yadong He, C. Xin, Yan-Qun Su","doi":"10.1177/02624893211053678","DOIUrl":"https://doi.org/10.1177/02624893211053678","url":null,"abstract":"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-crystal increased gradually with increased β-crystal nucleating agent content. The total crystallinity decreased with amount of addition increasing, and the relative content of β-crystal increased first and then decreased. When β-crystal nucleating agent content was 0.4 wt%, the relative β-crystal content reached the maximum value of 95.27%, and the final crystal grain refinement significantly. The addition of rare earth β-crystal nucleating agent has a good effect on improving the uniformity of foam cells. Under the same content of β-crystal nucleating agent and pressure, the average cell diameter and expansion ratio increased with the saturation temperature increasing. After the foaming temperature reaches 155°C, the expansion ratio began to decrease, which was also consistent with the changed trend of relative β-crystal content. At the same content of temperature and relative β-crystal, as the foaming pressure increased, the cell diameter decreased gradually, and the expansion ratio increased first, and then decreased.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"41 1","pages":"53 - 79"},"PeriodicalIF":1.6,"publicationDate":"2021-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47136408","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Theoretical modeling of longitudinal piezoelectric characteristic for cellular polymers 多孔聚合物纵向压电特性的理论建模

IF 1.6 4区医学

Cellular Polymers Pub Date : 2021-11-05 DOI: 10.1177/02624893211055830

Ikram Najihi, C. Ennawaoui, A. Hajjaji, Y. Boughaleb

{"title":"Theoretical modeling of longitudinal piezoelectric characteristic for cellular polymers","authors":"Ikram Najihi, C. Ennawaoui, A. Hajjaji, Y. Boughaleb","doi":"10.1177/02624893211055830","DOIUrl":"https://doi.org/10.1177/02624893211055830","url":null,"abstract":"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 model to study the energy harvesting capability of cellular polymers. The theoretical study models the response of these materials to investigate the effect of different parameters on the piezoelectric coefficient d33, particularly. The model considers the percentage of porosity, surface charge density in each polymer–gas surface, the properties of the polymer matrix and the gas encapsulated in the pores, and the Young’s modulus of the porous film. For poly(ethylene-co-vinyl acetate), the results showed that the piezoelectric performance of the film declines with the increase of the film thickness. However, the variation of the d33 as a function of the percentage of porosity is exponential and can achieve 4.24 pC/N for a porosity of 80%. Compared to a previously published experiment, the theoretical results have proven a good agreement with only 3.3% error.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":" ","pages":""},"PeriodicalIF":1.6,"publicationDate":"2021-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46215130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Preparation and properties of high melt strength PBS and its environmentally friendly foaming materials 高熔体强度PBS及其环保发泡材料的制备与性能

IF 1.6 4区医学

Cellular Polymers Pub Date : 2021-10-30 DOI: 10.1177/02624893211053674

Xiao-Ming Zhou, Yi-fan Liu

引用次数: 0

Microbubble technology for natural rubber latex foam production: The use of various gas-filled microbubbles 天然胶乳泡沫生产中的微气泡技术：各种充气微气泡的使用

IF 1.6 4区医学

Cellular Polymers Pub Date : 2021-10-23 DOI: 10.1177/02624893211053672

Kuntida Katkeaw, M. Khangkhamano, R. Kokoo

引用次数: 2