Journal of Cellular Plastics最新文献_第10页

Recycling printed polypropylene labels and polyolefins caps as chemical foaming agent to produce foam products 回收印刷聚丙烯标签和聚烯烃瓶盖作为化学发泡剂生产泡沫制品

IF 2.5 4区工程技术

Journal of Cellular Plastics Pub Date : 2020-09-30 DOI: 10.1177/0021955X20959302

J. Guillén-Mallette, P. Gonzalez-Chi, RH Cruz-Estrada, RN Miranda-Flores y, Ma Rivero-Ayala

{"title":"Recycling printed polypropylene labels and polyolefins caps as chemical foaming agent to produce foam products","authors":"J. Guillén-Mallette, P. Gonzalez-Chi, RH Cruz-Estrada, RN Miranda-Flores y, Ma Rivero-Ayala","doi":"10.1177/0021955X20959302","DOIUrl":"https://doi.org/10.1177/0021955X20959302","url":null,"abstract":"Recycling printed polypropylene (PP) labels and printed polyolefins (PO) caps as a chemical foaming agent to produce foam products is studied. An experimental Taguchi L16 design with seven experimental variables involved is used: talc content and screw angular velocity, at four experimental levels; extrusion temperature profile and extruded formulations, at three levels; and, type of label washing process, the use of metal mesh and the type of label drying process, at two levels. As control variables, the morphology of the cells and the density of the foamed products are utilized. The labels/caps mixture was composed of 21% printed PP labels and 79% printed polyolefin caps. Part of the pigments from the ink labels and some polar groups of low-molecular-weight materials present in the molten polymer were partially decomposed at the PP processing temperatures, which contributes to the cell formation and growth of the extruded foams. The labels/caps mixture generated large ellipsoidal and elongated cells (740 µm) oriented in the extrusion direction because of the presence of high density polyethylene (HDPE) and EVA in the recycled PP caps and labels. The experimental factors that influenced the foam density were the screw angular velocity and temperature, and the cell morphology depended on the matrix crystallinity and melt strength.","PeriodicalId":15236,"journal":{"name":"Journal of Cellular Plastics","volume":"11 1","pages":"733 - 756"},"PeriodicalIF":2.5,"publicationDate":"2020-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74815928","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Fabrication of rigid polyimide foams with overall enhancement of thermal and mechanical properties 刚性聚酰亚胺泡沫的制造，整体增强热性能和机械性能

IF 2.5 4区工程技术

Journal of Cellular Plastics Pub Date : 2020-09-20 DOI: 10.1177/0021955X20956925

Jianwei Li, Ni Yu, Yuanqing Ding, T. Xu, Guangcheng Zhang, Zhanxin Jing, Xuetao Shi

{"title":"Fabrication of rigid polyimide foams with overall enhancement of thermal and mechanical properties","authors":"Jianwei Li, Ni Yu, Yuanqing Ding, T. Xu, Guangcheng Zhang, Zhanxin Jing, Xuetao Shi","doi":"10.1177/0021955X20956925","DOIUrl":"https://doi.org/10.1177/0021955X20956925","url":null,"abstract":"Polyimide (PI) foams have been developed for decades and widely used as thermal insulation materials. However, the limited mechanical and thermal properties continually being a serious problem that restrict their further applications. In this study, a series of rigid PI foams with excellent mechanical and thermal performance were fabricated by the reaction of benzophenone-3,3',4,4'-tetracarboxylic dianhydride (BTDA) with two diamines of 2–(4-aminophenyl)-5-aminobenzimidazole (BIA) and 4,4'-diaminodiphenyl ether (ODA) with various molar ratios, and the cis-5-norbornene-endo-2,3-dicarbox-ylic acid (NA) was introduced as end-capping and foaming agent. The results demonstrate that the foaming degree decreases with increasing the BIA molar ratio in the polymer chains owing to the elevated melt viscosity of precursor. Furthermore, the prepared rigid PI foams exhibit excellent thermal and mechanical properties. When the BIA contend up to 40 mol%, the glass transition temperature (Tg) and the temperature at 10% of weight loss (Td 10 % ) of PI foam increased ∼80°C and ∼35°C in comparison with the pristine PI-0, respectively. In addition, the compressive strength and modulus at 10% strain of PI-4 reached to 5.48 MPa and 23.8 MPa, respectively. For the above-mentioned advantages, the prepared rigid PI foams are promising candidates as thermal insulation and structure support composite materials in the aerospace and aviation industries.","PeriodicalId":15236,"journal":{"name":"Journal of Cellular Plastics","volume":"1 1","pages":"717 - 731"},"PeriodicalIF":2.5,"publicationDate":"2020-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73124491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9

Increasing cell density/decreasing cell size to produce microcellular and nanocellular thermoplastic foams: A review 增加细胞密度/减小细胞尺寸制备微孔和纳米孔热塑性泡沫:综述

IF 2.5 4区工程技术

Journal of Cellular Plastics Pub Date : 2020-09-14 DOI: 10.1177/0021955X20959301

T. Azdast, R. Hasanzadeh

{"title":"Increasing cell density/decreasing cell size to produce microcellular and nanocellular thermoplastic foams: A review","authors":"T. Azdast, R. Hasanzadeh","doi":"10.1177/0021955X20959301","DOIUrl":"https://doi.org/10.1177/0021955X20959301","url":null,"abstract":"Nowadays, polymeric foams have attracted particular attention in scientific and industrial societies due to their unique properties, such as high strength to weight ratio, excellent thermal and sound insulation, and low cost. Researchers have shown that the extraordinary properties of polymeric foams such as superior thermal insulation, can be achieved by increasing the cell density/decreasing the cell size. In this regard, firstly, the most important foaming processes, i.e. batch, extrusion, and injection molding are studied in the present research. Then, cell nucleation stage as the most crucial phenomenon for achieving high cell density/small cell size is investigated in detail. In the next step, the most important researches in the field of polymeric foams are introduced in which the largest cell densities/smallest cell sizes have been achieved. The investigations show that the most remarkable results (highest cell densities/smallest cell sizes) belong to the batch process. Also, the use of nucleating agents, increasing the solubility of blowing agent into the polymer, and the use of nanoparticles are the most efficient solutions to achieve microcellular and nanocellular structures.","PeriodicalId":15236,"journal":{"name":"Journal of Cellular Plastics","volume":"21 1","pages":"769 - 797"},"PeriodicalIF":2.5,"publicationDate":"2020-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88978758","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 33

Carbon particulate and controlled-hydrolysis assisted extrusion foaming of semi-crystalline polyethylene terephthalate for the enhanced thermal insulation property 半结晶聚对苯二甲酸乙二醇酯的碳颗粒和控制水解辅助挤出发泡以增强隔热性能

IF 2.5 4区工程技术

Journal of Cellular Plastics Pub Date : 2020-09-03 DOI: 10.1177/0021955X20952751

Junjie Pan, Feng Chen, E. Cabrera, Zhiyu Min, Shilun Ruan, Min Wu, Dan Zhang, J. Castro, L. J. Lee

{"title":"Carbon particulate and controlled-hydrolysis assisted extrusion foaming of semi-crystalline polyethylene terephthalate for the enhanced thermal insulation property","authors":"Junjie Pan, Feng Chen, E. Cabrera, Zhiyu Min, Shilun Ruan, Min Wu, Dan Zhang, J. Castro, L. J. Lee","doi":"10.1177/0021955X20952751","DOIUrl":"https://doi.org/10.1177/0021955X20952751","url":null,"abstract":"This work presents a facile method to produce low-density PET foams using pristine semi-crystalline resin by moisture-induced controlled-hydrolysis in a tight processing window (moisture content ∼ 0.12 wt.%). We investigated the effect of moisture and moisture containing activated carbon (AC) on the foam expansion ratio, cell morphology, and PET resin degradation and crystallization properties. Controlled-hydrolysis increased the melt-flow rate of PET resin (intrinsic viscosity: 0.52 to 0.54 dL/g) without losing crystallinity, and thus the PET foams possess better tensile properties (∼2 MPa stress and ∼100% strain) and higher thermal stability (>200°C) than chemically modified PET foams. The foam density could be made as low as ∼ 0.15 g/cm3 using a lab scale twin-screw extruder. A strand array die was also designed to produce plate-shaped foam samples. AC allowed easier control of the moisture content and delayed resin degradation in extrusion. Both AC and micrographite (mGr) could stabilize the PET foam morphology in extrusion and serve as good infrared attenuation agents (IAAs) in a simulated housing thermal insulation experiment.","PeriodicalId":15236,"journal":{"name":"Journal of Cellular Plastics","volume":"71 1","pages":"695 - 716"},"PeriodicalIF":2.5,"publicationDate":"2020-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89835140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Patents 专利

IF 2.5 4区工程技术

Journal of Cellular Plastics Pub Date : 2020-09-01 DOI: 10.1177/0021955X20946585

引用次数: 0

Foaming behavior of poly(lactic acid) with different D-isomer content based on supercritical CO2-induced crystallization 基于超临界co2诱导结晶的不同d -异构体含量聚乳酸的发泡行为

IF 2.5 4区工程技术

Journal of Cellular Plastics Pub Date : 2020-08-26 DOI: 10.1177/0021955X20950242

Jinwei Chen, Ling Yang, Qunshan Mai, Mei Li, Lixuan Wu, Ping Kong

{"title":"Foaming behavior of poly(lactic acid) with different D-isomer content based on supercritical CO2-induced crystallization","authors":"Jinwei Chen, Ling Yang, Qunshan Mai, Mei Li, Lixuan Wu, Ping Kong","doi":"10.1177/0021955X20950242","DOIUrl":"https://doi.org/10.1177/0021955X20950242","url":null,"abstract":"Using supercritical carbon dioxide (sc-CO2) as a physical foaming agent, the effect of sc-CO2 on the formation of crystalline domains and subsequently on the foaming behaviors of the two grades of PLA with different D-isomer content were investigated in a wide foaming temperature range. The PLA’s final crystallinity is significantly increased with decreasing annealing temperature and by reducing the D-isomer content. Cellular structure results show that not only the crystallinity but also the crystalline morphology play an important role in cellular structure. A novel spherulite morphology including ringless and ring-banded morphology in the same spherulite was formed at lower foaming temperature, as a result, some entities were nonuniformly distributed in the PLA foams. Uniform and closed cellular structure were obtained when only the ring-banded spherulites were formed. An opened and interconnected cellular structure is tended to be formed because of the synergistic effect of high temperature and plasticization of CO2. Based on the crystallinity and morphology, a suitable foaming window as a function of temperature is proposed. It is found that PLA with 4.1% D-isomer content had much broader suitable foaming window range to produce homogeneous cellular structure.","PeriodicalId":15236,"journal":{"name":"Journal of Cellular Plastics","volume":"5 1","pages":"675 - 694"},"PeriodicalIF":2.5,"publicationDate":"2020-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75799705","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Fabrication of water-soluble loose-fill foam from tamarind (Tamarindus indica L.) seed polysaccharide by mechanical frothing and freeze-drying process 以罗望子多糖为原料，采用机械发泡和冷冻干燥法制备水溶性松散填充泡沫

IF 2.5 4区工程技术

Journal of Cellular Plastics Pub Date : 2020-08-20 DOI: 10.1177/0021955X20948560

L. Songtipya, Ponusa Songtipya, T. Prodpran, E. Kalkornsurapranee, J. Johns

引用次数: 0

Experimental investigation on the forming and evolution process of cell structure in gas counter pressure assisted chemical foaming injection molded parts 气体反压辅助化学发泡注塑件胞体结构形成及演化过程的实验研究

IF 2.5 4区工程技术

Journal of Cellular Plastics Pub Date : 2020-08-16 DOI: 10.1177/0021955X20950224

Shuai Li, X. Sun, Rui Wang, Yan Hu, Xiaofei Ma, Jiachang Wang

引用次数: 2

Expandable polystyrene without any embedded blowing agent 可膨胀聚苯乙烯没有任何嵌入发泡剂

IF 2.5 4区工程技术

Journal of Cellular Plastics Pub Date : 2020-08-05 DOI: 10.1177/0021955X20944971

Habib Haji Avdi, M. Nasiri, Mohammad Javad Tehrani, Maryam Alizadeh Aghdam, F. Abbasi

{"title":"Expandable polystyrene without any embedded blowing agent","authors":"Habib Haji Avdi, M. Nasiri, Mohammad Javad Tehrani, Maryam Alizadeh Aghdam, F. Abbasi","doi":"10.1177/0021955X20944971","DOIUrl":"https://doi.org/10.1177/0021955X20944971","url":null,"abstract":"In this research, in-situ suspension polymerization of styrene in the presence of graphene, without any blowing agent, was investigated. Steam used in the expansion process of graphene-filled expandable polystyrene (GEPS). The dispersed graphene nano-sheets in the polystyrene matrix may absorb water in high temperatures, which evaporates by lowering the pressure and expansion precedes. The effects of graphene type and loading and steam temperature on the expansion ratio evaluated. Scanning electron microscopy (SEM) used to reveal the cross-section morphologies before and after expansion. The effect of graphene on the polymerization kinetics evaluated by differential scanning calorimetry (DSC). The results showed that by increasing the graphene loading, the rate of polymerization decreased, and the expansion ratio increased. The highest expansion ratio of about 4.8 was for particles containing 0.4% of graphene. Therefore, it was shown that by using graphene as a dispersed phase, polystyrene particles expanded without any organic blowing agents. Here, the idea of expandable polymers without any embedded blowing agent is introduced, which eliminates the release of volatile organic compounds and makes the process environmentally friendly.","PeriodicalId":15236,"journal":{"name":"Journal of Cellular Plastics","volume":"8 1","pages":"535 - 544"},"PeriodicalIF":2.5,"publicationDate":"2020-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83358759","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Polymeric foams from recycled thermoplastic poly(ethylene terephthalate) 由回收的热塑性聚对苯二甲酸乙酯制成的聚合物泡沫

IF 2.5 4区工程技术

Journal of Cellular Plastics Pub Date : 2020-08-05 DOI: 10.1177/0021955X20948562

Mylene S. Cadete, T. Gomes, P. Carvalho, V. Neto

{"title":"Polymeric foams from recycled thermoplastic poly(ethylene terephthalate)","authors":"Mylene S. Cadete, T. Gomes, P. Carvalho, V. Neto","doi":"10.1177/0021955X20948562","DOIUrl":"https://doi.org/10.1177/0021955X20948562","url":null,"abstract":"With the increase use of plastics, there is currently a concern with the waste of materials, resulting in a series of challenges and opportunities for the waste management sector. In the present work, poly(ethylene terephthalate) (PET) foam was produced from recycled PET (RPET) from used water bottles. The recycled material was manually prepared and foamed in batches with the assistance of nitrogen gas as the physical blowing agent. RPET was characterized using Differential Scanning Calorimetry (DSC), Dynamic Mechanical Analysis (DMA), Fourier Transform Infrared Spectroscopy (FTIR) and Thermogravimetric Analysis (TGA). The influence of the pressure on the foam formation was studied and the results obtained showed that this variable influences the final product characteristics. To evaluate the behavior of the foams, their morphology, response to deformation when subject to compression and their thermal conductivities were studied. The morphology analysis showed that operating at higher-pressure results in bigger pore size but also in an increased pore size heterogeneous distribution, and foams that exhibit a higher thermal conductivity.","PeriodicalId":15236,"journal":{"name":"Journal of Cellular Plastics","volume":"11 6 1","pages":"609 - 622"},"PeriodicalIF":2.5,"publicationDate":"2020-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85723164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1