β-Nucleation effects induced by long chain branching polypropylene

被引：0

作者：

Zhou, Shuai ^{[1
]}

Xin, Zhong ^{[1
,2
]}

Wang, Weixia ^{[1
]}

Zhao, Shicheng ^{[1
]}

Shi, Yaoqi ^{[3
]}

机构：

[1] State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai

[2] Shanghai Key Laboratory of Multiphase Materials Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai

[3] Shanghai Key Laboratory of Catalysis Technology for Polyolefins, Shanghai Research Institute of Chemical Industry, Shanghai

来源：

Huagong Xuebao/CIESC Journal | 2015年 / 66卷 / 09期

基金：

中国国家自然科学基金;

关键词：

Long chain branching polypropylene; Mechanical properties; Nucleating agent; β-crystal;

D O I：

10.11949/j.issn.0438-1157.20150846

中图分类号：

学科分类号：

摘要：

Taking advantages of long chain branching polypropylene based on grafting vinyl polydimethylsiloxane/ styrene (PP-g-VS/St) can generate β-crystal polypropylene under shear and high cooling rate condition, PP-g-VS/St was used as a polymeric β-nucleating agent for isotactic polypropylene (iPP) under injection modeling processing and its effects on the crystallization temperature, crystal structure and mechanical properties of iPP were investigated. The results indicated that the crystallization temperature, β-crystal relative content and mechanical properties of modified iPP were improved as increasing the content of PP-g-VS/St. The crystallization temperature of modified iPP with 50% (mass) PP-g-VS/St increased by 10℃ compared with that of virgin iPP and the β-crystal relative content reached 32.8%. The impact strength, flexural modulus and tensile strength were enhanced by 355.3%, 53.8% and 15.9%, respectively, compared with those of virgin iPP. These results may provide a new method to design polymeric β-nucleating agent for iPP. © All right reserved.

引用

页码：3788 / 3794

页数：6

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