Cellular Polymers最新文献_第10页

Evaluation of PVA/dextran/chitosan hydrogel for wound dressing PVA/葡聚糖/壳聚糖水凝胶用于伤口敷料的评价

IF 1.6 4区医学

Cellular Polymers Pub Date : 2019-04-08 DOI: 10.1177/0262489319839211

Shin-Ping Lin, Kai-Yin Lo, Tien-Ni Tseng, Jui-Ming Liu, Ting-Yu Shih, Kuan-Chen Cheng

引用次数: 33

Density graded polyethylene foams: Effect of processing conditions on mechanical properties 密度梯度聚乙烯泡沫：加工条件对机械性能的影响

IF 1.6 4区医学

Cellular Polymers Pub Date : 2019-03-31 DOI: 10.1177/0262489319839632

E. Cusson, A. Akbarzadeh, D. Therriault, D. Rodrigue

引用次数: 7

The effect on the surface activity and the structure of SPI caused by cleavage of disulfide bonds and by subsequent glucose modification 二硫键断裂和随后的葡萄糖修饰对SPI表面活性和结构的影响

IF 1.6 4区医学

Cellular Polymers Pub Date : 2019-01-01 DOI: 10.1177/0262489319843645

Fan Junfu, L. Junsheng, Wang Bixuan, Zhong Xin, Huang Guo-xia, Yan Liujuan, Ren Xiane

{"title":"The effect on the surface activity and the structure of SPI caused by cleavage of disulfide bonds and by subsequent glucose modification","authors":"Fan Junfu, L. Junsheng, Wang Bixuan, Zhong Xin, Huang Guo-xia, Yan Liujuan, Ren Xiane","doi":"10.1177/0262489319843645","DOIUrl":"https://doi.org/10.1177/0262489319843645","url":null,"abstract":"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 the surface properties of SPI significantly; however, excessive oxidation can obtain undesirable results. When the concentration of peracetic acid was 0.4%, following by 35.5% of the disulfide bond cleavage, compared with those of natural SPI, the foaming capacity (FC), foaming stability (FS), emulsifying capacity (EC), and emulsifying stability (ES) of oxidized-SPI were increased by 82.0%, 65.8%, 58.5%, and 41.5%, respectively. The surface activity of oxidized-SPI could be promoted by glucose modification, and the FC, FS, EC, and ES of oxidized-SPI have further risen to 146.8%, 96.0%, 131.4%, and 40.3%, respectively, after the further glucose modification. Particle size measurements showed bimodality for the SPI that was modified with glucose with a portion of smaller sizes seen. Fluorescence spectroscopy and circular dichroism measurements demonstrate that extensibility increases; flexibility is enhanced; and glycosylation occurs more readily due to the oxidation of SPI. When grafted with glucose, these oxidized soybean protein products produce more ideal foaming and display better emulsification properties.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2019-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/0262489319843645","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43593424","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

Applications of Core Retraction in Manufacturing Low-Density Polypropylene Foams with Microcellular Injection Molding 缩芯技术在微孔注射成型制造低密度聚丙烯泡沫塑料中的应用

IF 1.6 4区医学

Cellular Polymers Pub Date : 2018-09-04 DOI: 10.1177/026248931803700101

H. Kharbas, Thomas Ellingham, L. Turng

{"title":"Applications of Core Retraction in Manufacturing Low-Density Polypropylene Foams with Microcellular Injection Molding","authors":"H. Kharbas, Thomas Ellingham, L. Turng","doi":"10.1177/026248931803700101","DOIUrl":"https://doi.org/10.1177/026248931803700101","url":null,"abstract":"Without modifying existing part and mold designs, the conventional microcellular injection molding (MIM) process can typically save about 5–10% material without encountering problems such as incomplete filling, excessive shrinkage, or deteriorating microstructure and mechanical properties. In this study core retraction was used in combination with the MIM process to produce thick polypropylene (PP) parts (up to 7.6 mm thick) with high density reductions of 30% and 55%. The cavity volume was modified by changing the retraction distance, which enabled control of density reductions. The lowest densities were achieved with this core retraction-aided microcellular injection molding (CR-MIM) process, the results of which could not have been achieved by the conventional MIM process alone. The effects of delay time in core retraction and weight reduction on the microstructure of the core and skin layers were investigated. It was shown that the CR-MIM process yielded better microstructure and tensile properties than the conventional MIM process. Use of core retraction also yielded more consistent densities and tensile properties throughout the length of the foamed parts.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2018-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/026248931803700101","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41867493","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 Recycling on the Cellular Structure of Polylactide in a Batch Process 间歇过程中回收对聚乳酸细胞结构的影响

IF 1.6 4区医学

Cellular Polymers Pub Date : 2018-09-04 DOI: 10.1177/026248931803700202

Joanna Ludwiczak, S. Frąckowiak, Rafał Łużny

引用次数: 4

Cellular Morphology Optimization of Polypropylene/CaCO3 Composite Films Designed for Piezoelectric Applications 压电型聚丙烯/CaCO3复合薄膜的细胞形态优化

IF 1.6 4区医学

Cellular Polymers Pub Date : 2018-09-04 DOI: 10.1177/026248931803700301

Eric Audet, F. Mighri, D. Rodrigue, A. Ajji

{"title":"Cellular Morphology Optimization of Polypropylene/CaCO3 Composite Films Designed for Piezoelectric Applications","authors":"Eric Audet, F. Mighri, D. Rodrigue, A. Ajji","doi":"10.1177/026248931803700301","DOIUrl":"https://doi.org/10.1177/026248931803700301","url":null,"abstract":"In this work, the cellular morphology of polypropylene (PP)/calcium carbonate (CaCO3) composite films was optimized with respect to piezoelectric cellular films criteria. To do this, a series of PP films filled with CaCO3 micro-particles of three different particle sizes (3, 6 and 12 microns) were developed at various weight concentrations (3 to 44 wt. %). Before going through a gas diffusion expansion (GDE) step to inflate the initiated cells, all composite films were first produced via extrusion/calendaring then biaxially stretched to initiate the cellular structure by interfacial delamination between the CaCO3 particles and PP matrix. After biaxial stretching and GDE, it was observed that only films with filler contents above 23 wt.% and 12 μm particle size presented a well-developed cellular structure. By optimizing the extrusion, biaxial stretching and GDE steps, we were able to generate a required cellular morphology where the average cell height ranged between 5 and 8 μm, which is considered good for further Corona charging. Also, the average cell aspect ratio (cell length divided by cell height) ranged between 4 and 10 with an average cell wall thickness between 7 and 12 μm, which is also considered as optimum for good piezoelectric properties.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2018-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/026248931803700301","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43214018","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

Compression Properties of Syntactic Foam Reinforced by Warp-knitted Spacer Fabric: Theoretical Compression Strength Model and Experimental Verification 经编间隔织物增强复合泡沫的压缩性能：理论压缩强度模型与实验验证

IF 1.6 4区医学

Cellular Polymers Pub Date : 2018-09-04 DOI: 10.1177/026248931803700102

Chao Zhi, Guoqing Zhu, J. Meng, Jinhua Jiang, H. Long, Lingjie Yu

引用次数: 5

Rotomolding of Foamed and Unfoamed GTR-LLDPE Blends: Mechanical, Morphological and Physical Properties 发泡和未发泡GTR-LLDPE共混物的旋转成型：机械、形态和物理性能

IF 1.6 4区医学

Cellular Polymers Pub Date : 2018-09-04 DOI: 10.1177/026248931803700201

Y. Dou, D. Rodrigue

引用次数: 14

Multi-Stage Recycling Induced Morphological Transformations in Solid-State Microcellular Foaming of Polystyrene 多级回收诱导聚苯乙烯固态微孔发泡的形态转变

IF 1.6 4区医学

Cellular Polymers Pub Date : 2018-09-04 DOI: 10.1177/026248931803700302

Indrajeet Singh, A. Gandhi, M. Biswal, S. Mohanty, S. K. Nayak

{"title":"Multi-Stage Recycling Induced Morphological Transformations in Solid-State Microcellular Foaming of Polystyrene","authors":"Indrajeet Singh, A. Gandhi, M. Biswal, S. Mohanty, S. K. Nayak","doi":"10.1177/026248931803700302","DOIUrl":"https://doi.org/10.1177/026248931803700302","url":null,"abstract":"In this article, the general-purpose polystyrene was reprocessed four times. The effect of repeated reprocessing of polystyrene on its polymeric properties and on its microcellular, foaming behaviour were investigated. It was observed that reprocessing leads to break of long polymeric chains into short chains, which resulted increment in PDI and MFI. Molecular weight and Glass transition temperature were found to decrease with increasing recycling stages. Reprocessing resulted abruptly decrement in viscosity of neat polystyrene. Effect of reprocessing on foaming behaviour was analysed properly in this report and it was found that reprocessing resulted in improvement in cell sizes and their distribution. A positive effect on expansion ratio was also observed during foaming of reprocessed specimens. Cell density was found to decrease with increasing recycling stages. The effect of saturation pressure and foaming temperature on microcellular foam morphology along with recycling were investigated. Effect of foaming time on cell size, cell size distribution, cell density, expansion ratio and cell wall thickness was investigated.","PeriodicalId":9816,"journal":{"name":"Cellular Polymers","volume":null,"pages":null},"PeriodicalIF":1.6,"publicationDate":"2018-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1177/026248931803700302","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49128545","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: 11

The new method of manufacturing porous castings from styrene–acrylic dispersion 介绍了用苯乙烯-丙烯酸分散体制备多孔铸件的新方法

IF 1.6 4区医学

Cellular Polymers Pub Date : 2018-07-01 DOI: 10.1177/0262489318797513

Paweł Palutkiewicz

引用次数: 0