Cellular Polymers最新文献_第4页

Effect of small amount of functionalized multi-walled carbon nanotubes on the properties of rigid polyisocyanurate and polyurethane foam composites 少量功能化多壁碳纳米管对硬质聚异氰脲酸酯和聚氨酯泡沫复合材料性能的影响

IF 1.6 4区医学

Cellular Polymers Pub Date : 2023-03-01 DOI: 10.1177/02624893231191838

R. Vlasov, D. Ryabova, Sakina Zeynalova, Marcel Nazmutdinov, Sergey Ryabov

引用次数: 0

Influence of particle geometry and size on the cell morphology of vacuum assisted rotationally molded foam 颗粒几何形状和尺寸对真空辅助旋转成型泡沫细胞形态的影响

IF 1.6 4区医学

Cellular Polymers Pub Date : 2023-03-01 DOI: 10.1177/02624893231171662

J. Werner, D. Drummer

{"title":"Influence of particle geometry and size on the cell morphology of vacuum assisted rotationally molded foam","authors":"J. Werner, D. Drummer","doi":"10.1177/02624893231171662","DOIUrl":"https://doi.org/10.1177/02624893231171662","url":null,"abstract":"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 increased efficiency. With this in mind, a new process has been developed for foaming without blowing agents in rotational molding. Process related air inclusions in the polymer melt are expanded to form the cell structure by means of vacuum application. In the presented study, the influence of different particle sizes as well as the arising potential of deploying microgranules in the otherwise powder-based process is investigated with regard to the resulting foam cells. The results confirm that particle size and form greatly influence the existence and size of air inclusions in the polymer melt. It could be proven that these differences, caused by the particle characteristics, propagate during the foaming process and lead to different cell morphologies in the resultant foam. Furthermore, it is indicated that qualitative predictions of the resulting cell dimensions can be made on the basis of bulk density measurements and the analysis of the sintering behaviour of the initial particles.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"42 1","pages":"107 - 122"},"PeriodicalIF":1.6,"publicationDate":"2023-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47754723","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

A study of the cell morphology and mechanical properties of bumper material PP-T-EPDM composite foam 保险杠材料PP-T-EPDM复合泡沫的细胞形态及力学性能研究

IF 1.6 4区医学

Cellular Polymers Pub Date : 2023-01-23 DOI: 10.1177/02624893231151363

S. Yetgin, H. Unal

引用次数: 0

Role of hemp fiber addition on thermal stability, heat insulation, air permeability and cellular structural features of rigid polyurethane foam 麻纤维添加量对硬质聚氨酯泡沫材料热稳定性、隔热性能、透气性及孔结构特性的影响

IF 1.6 4区医学

Cellular Polymers Pub Date : 2023-01-22 DOI: 10.1177/02624893231152383

U. Soykan, Ş. Kaya

{"title":"Role of hemp fiber addition on thermal stability, heat insulation, air permeability and cellular structural features of rigid polyurethane foam","authors":"U. Soykan, Ş. Kaya","doi":"10.1177/02624893231152383","DOIUrl":"https://doi.org/10.1177/02624893231152383","url":null,"abstract":"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 influences of the hemp fiber addition on the RPUFs were investigated meticulously by means of Fourier-transform infrared spectroscopy (FTIR), thermo gravimetric analysis (TGA), thermal conductivity measurement and scanning electron microscopy (SEM) techniques by evaluating the alternations in the chemical structures of the component, thermal stability, apparent density, insulation performance and cellular topology of the produced samples. The structural analysis revealed that there existed the strong secondary chemical bonds between the functional groups belonging to the components and, depending on that, the improvement in the thermal stability of the foam samples was recorded accompanied by the formation of the better interfacial adhesion. Furthermore, thermal conductivity values of the hemp fiber-loaded RPUFs were observed to increase regularly with the increasing of the content level of the hemp fibers. This was explained by enhancement in the bulk phase conduction level depending of the apparent density rising, reduction in CO2 concentration inside cells as well as the formation of the distorted cellular structures. The obtained air permeability results displayed that the hemp fibers incorporated successfully with RPUF structure, which provides the occurrence of the novel micro barriers and pathways limiting the passage of the air throughout the matrix. The taken scanning electron microscopy images also indicated that the cellular morphology and dimensional stability of the produced foams affected negatively by the hemp fiber addition. At high contents, the wrinkled, non-uniform and irregular cellular structures were observed with ruptured and collapsed walls and struts.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"42 1","pages":"88 - 104"},"PeriodicalIF":1.6,"publicationDate":"2023-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43602186","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: 2

Natural rubber/wood composite foam: Thermal insulation and acoustic isolation materials for construction 天然橡胶/木材复合泡沫:建筑用隔热和隔音材料

IF 1.6 4区医学

Cellular Polymers Pub Date : 2023-01-06 DOI: 10.1177/02624893231151364

Laura Neves de Alencar, Fábio Friol Guedes Paiva, F. Okimoto, G. Bacarin, Guilherme Dognani, L. O. Salmazo, R. J. dos Santos, F. Cabrera, A. Job

{"title":"Natural rubber/wood composite foam: Thermal insulation and acoustic isolation materials for construction","authors":"Laura Neves de Alencar, Fábio Friol Guedes Paiva, F. Okimoto, G. Bacarin, Guilherme Dognani, L. O. Salmazo, R. J. dos Santos, F. Cabrera, A. Job","doi":"10.1177/02624893231151364","DOIUrl":"https://doi.org/10.1177/02624893231151364","url":null,"abstract":"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 work proposes the use of expanded natural rubber as a polymeric matrix incorporated with eucalyptus filler as a reinforcing filler for the production of composites. Thermal insulation capacity was determined by the transient plane source and acoustic method by impedance tube. NR/W40 foam showed enhanced the acoustic insulation capacity. The maximum absorption of NR/W40 was 0.83, at 3257 Hz, which is three times higher than natural rubber foam. Highly inhomogeneous cell structures were observed with large, interconnected pores, improving the acoustic performance. Sound absorption coefficient for natural rubber foam with 40% wood (0.83 ± 0.046) was similar to PU foam (0.97 ± 0.009) with 20 mm in thickness, a density of 47 kg/m3 and 98% open cell content it is a well-known acoustic absorbent in the building sector. The NR/W40 sample recorded the best acoustic performance among the NR foams analyzed in this work, maintaining good sound absorption above 1500 Hz, demonstrating a possibility of wood reuse as a filler in based-rubber foam for acustic insulation.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"42 1","pages":"55 - 72"},"PeriodicalIF":1.6,"publicationDate":"2023-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45703032","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

Density graded polymer composite foams 密度梯度聚合物复合泡沫

IF 1.6 4区医学

Cellular Polymers Pub Date : 2022-11-30 DOI: 10.1177/02624893221143507

Xuemei Tan, D. Rodrigue

引用次数: 2

A sound-absorbing and heat-insulating collagen fiber composite material 一种吸音隔热的胶原纤维复合材料

IF 1.6 4区医学

Cellular Polymers Pub Date : 2022-09-27 DOI: 10.1177/02624893221130154

Jiaxing Zhang Hui Chen, Z. Shan

引用次数: 0

Compressive Properties of Poly (Dimethylsiloxane)–Hollow Glass Microballoons Syntactic Foams 聚二甲基硅氧烷-中空玻璃微球复合泡沫的压缩性能

IF 1.6 4区医学

Cellular Polymers Pub Date : 2022-08-29 DOI: 10.1177/02624893221123391

Alok K Upadhyay, A. Ullas

引用次数: 1

Porous synthetic hydrogel carrying basic fibroblast growth factor with controllable and rapid degradation rate to promote wound healing 多孔合成水凝胶携带碱性成纤维细胞生长因子，降解速度可控、快速，促进伤口愈合

IF 1.6 4区医学

Cellular Polymers Pub Date : 2022-08-26 DOI: 10.1177/02624893221120535

Qian Wu, Huijie Gu, Haiyan Cui, Shu Zhou

{"title":"Porous synthetic hydrogel carrying basic fibroblast growth factor with controllable and rapid degradation rate to promote wound healing","authors":"Qian Wu, Huijie Gu, Haiyan Cui, Shu Zhou","doi":"10.1177/02624893221120535","DOIUrl":"https://doi.org/10.1177/02624893221120535","url":null,"abstract":"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 secondary damage. Thus, there is an urgent need to develop a method platform to control the degradation rate of hydrogel, so as to realize the on-demand replacement. The present study fabricated a porous hydrogel from co-polymized N,N′-bis(acryloyl) cystamine (BAC), allyl polyethylene glycol 500 (APEG500) and acrylic acid (AA) with the presence of polycaprolactone (PCL). BAC contains disulfide bond, which crosslinked the hydrogel. The pore size of the porous hydrogel was 400–600 μm. Higher content of BAC indicated higher crosslinking density, which reduced swelling ratio of hydrogel, while promoted hydrogel storage modulus. At the same time, the presence of PCL reduced swelling ratio of hydrogel, while promoted hydrogel mechanical properties, endowing hydrogel with tough feature. Porous hydrogels that crosslinked by disulfide bonds immersed in glutathione solution were found to degrade spontaneously and quickly due to the response to glutathione. Both crosslinking density and PCL content affected the degradation rate. The porous hydrogel carrying bFGF was applied to wound, promoting angiogenesis, thus accelerating wound healing within 12 d. Due to the spontaneous and rapid degradation of optimized porous hydrogel on wound within 3 days, there was no operation of removing dressing during treatment, avoiding damage during dressing replacement.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"41 1","pages":"231 - 242"},"PeriodicalIF":1.6,"publicationDate":"2022-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49356022","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

Rigid polyurethane foam composites based on iron tailing: Thermal stability, flame retardancy and fire toxicity 基于铁尾矿的硬质聚氨酯泡沫复合材料:热稳定性、阻燃性和火毒性

IF 1.6 4区医学

Cellular Polymers Pub Date : 2022-05-26 DOI: 10.1177/02624893221105317

Yadong Yang, Hai-jian Shen, Yuzhou Luo, Renhui Zhang, Junjie Sun, Xiuyu Liu, Zhifang Zong, Gang Tang

{"title":"Rigid polyurethane foam composites based on iron tailing: Thermal stability, flame retardancy and fire toxicity","authors":"Yadong Yang, Hai-jian Shen, Yuzhou Luo, Renhui Zhang, Junjie Sun, Xiuyu Liu, Zhifang Zong, Gang Tang","doi":"10.1177/02624893221105317","DOIUrl":"https://doi.org/10.1177/02624893221105317","url":null,"abstract":"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 paper. The flame retardant performance, combustion performance, gas-phase products and char residue’s related properties of RPUF/ITS composites were systematically investigated by limiting oxygen index, thermogravimetric (TG), cone calorimetry (CCT) and thermogravimetric-infrared spectrometry (TG-FTIR). The results showed that ITS improved the overall thermal stability of the composites, and the T-5%, T-50%, Tmax1, Tmax2 and char residue rates were all higher than those of the pure samples. The CCT indicated that ITS had a certain effect on smoke suppression and heat release reduction. The peak heat release rate of RPUF-6 was reduced by 22.75% compared with that of the pure sample, and the total smoke release of RPUF-2 was reduced by 25.36%. Smoke factor (SF), fire growth rate index and fire performance index indicated that ITS reduced the fire risk of RPUF/ITS composites. TG-FTIR showed that ITS inhibited the decomposition of RPUF/ITS composites, and the release intensity of hydrocarbons, CO2, isocyanate compound, CO, aromatic compounds and esters decreased significantly. TG, MCC, scanning electron microscope and Raman implied that ITS promoted the formation of a dense char layer in RPUF and improved the heat resistance of the char layer.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":"41 1","pages":"189 - 207"},"PeriodicalIF":1.6,"publicationDate":"2022-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42672779","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: 3