Injection Molding Shrinkage and Mechanical Properties of Polypropylene Blends

被引：12

作者：

Qi, Guo-Qiang ^{[1
]}

Xu, Ya-Jun ^{[1
]}

Yang, Wei ^{[1
]}

Xie, Bang-Hu ^{[1
]}

Yang, Ming-Bo ^{[1
]}

机构：

[1] Sichuan Univ, Coll Polymer Sci & Engn, State Key Lab Polymer Mat Engn, Chengdu 610065, Sichuan, Peoples R China

来源：

JOURNAL OF MACROMOLECULAR SCIENCE PART B-PHYSICS | 2011年 / 50卷 / 09期

基金：

中国国家自然科学基金;

关键词：

injection molding; mechanical properties; polypropylene blends; shrinkage; PARAMETERS; WARPAGE;

D O I：

10.1080/00222348.2011.583798

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Polypropylene (PP) blends based on isotactic polypropylene (iPP), propylene-ethylene block copolymer (bPP), and propylene-ethylene random copolymer (rPP) were prepared by melt blending and the effects of content of bPP and rPP on the shrinkage during solidification and storage and mechanical properties of the blends were studied. It was found that the addition of polypropylene copolymer could effectively reduce the processing shrinkage of iPP and the lowest shrinkage of the blends was achieved at a loading of 2 wt% bPP or rPP. The flexural modulus and tensile strength of the blends decreased a little while the impact strength and elongation at break were improved greatly compared with those of iPP.

引用

页码：1747 / 1760

页数：14

共 27 条

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