Density graded polyethylene foams: Effect of processing conditions on mechanical properties

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2019-03-31 DOI:10.1177/0262489319839632

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

引用次数: 7

Abstract

Uniform foams (UF) and density graded foams (DGF) were produced by using similar or different temperatures on both sides of a compression molding system. The samples were produced using linear low density polyethylene as the matrix and activated azodicarbonamide as the chemical blowing agent. Morphological properties of the produced samples were analyzed via scanning electron microscopy to relate them to their mechanical properties. In particular, flexural and impact properties are reported for samples produced under a range of temperatures (140–200°C) and blowing agent concentration (0.7–1.0 wt%). The experimental results showed that a significant difference can be obtained in flexural modulus (up to 17%) and impact strength (up to 48%) depending on the side the stress is applied on. In all cases, the DGF showed better mechanical responses than UF of similar relative density for the range of conditions tested.

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密度梯度聚乙烯泡沫：加工条件对机械性能的影响

均匀泡沫(UF)和密度梯度泡沫(DGF)是通过在压缩成型系统的两侧使用相似或不同的温度生产的。以线性低密度聚乙烯为基体，偶氮二甲酰胺为化学发泡剂制备样品。通过扫描电镜分析了所生产样品的形态特征，并将其与力学性能联系起来。特别是，报告了在温度(140-200°C)和发泡剂浓度(0.7-1.0 wt%)范围内生产的样品的弯曲和冲击性能。实验结果表明，根据施加应力的侧面不同，可以获得显著的弯曲模量(高达17%)和冲击强度(高达48%)差异。在所有情况下，在测试的条件范围内，DGF表现出比相对密度相似的UF更好的力学响应。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.