Effect of elastomer on crystalline transition and deformation behavior of isotactic polypropylene

被引：24

作者：

Liu, Guoming ^{[1
]}

Zhang, Xiuqin ^{[2
]}

Liu, Yufeng ^{[1
]}

Li, Xiuhong ^{[3
]}

Chen, Hongyu ^{[4
]}

Walton, Kim ^{[5
]}

Marchand, Gary ^{[5
]}

Wang, Dujin ^{[1
]}

机构：

[1] Chinese Acad Sci, Beijing Natl Lab Mol Sci, CAS Key Lab Engn Plast, Inst Chem, Beijing 100190, Peoples R China

[2] Beijing Inst Fash Technol, Sch Mat Sci & Engn, Beijing Key Lab Clothing Mat R&D & Assessment, Beijing 100029, Peoples R China

[3] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai Synchrotron Radiat Facil, Shanghai 201204, Peoples R China

[4] Dow Chem China Co Ltd, Shanghai 201203, Peoples R China

[5] Dow Chem Co USA, Freeport, TX 77541 USA

来源：

POLYMER | 2013年 / 54卷 / 04期

基金：

中国国家自然科学基金;

关键词：

Isotactic polypropylene; Deformation; Crystal transition; MECHANICAL-PROPERTIES; TOUGHENING MECHANISMS; MODIFIED EPOXIES; BINARY BLENDS; CAVITATION; MORPHOLOGY; COPOLYMERS; MODEL;

D O I：

10.1016/j.polymer.2013.01.012

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

The structural evolution during uniaxial tensile deformation of isotactic polypropylene (iPP) and its blend with olefin block copolymer (OBC) was comparatively investigated by in-situ synchrotron X-ray scattering. Small angle X-ray scattering showed that cavitation in iPP/OBC blend took place at a smaller strain than that in neat iPP. The reorientation of the cavities in iPP/OBC occurred at a lower strain than that in iPP as well. Wide angle X-ray scattering was applied to study the crystal-mesophase transition and the orientation process. Compared to the sharp transition in neat iPP, the mesophase formation and orientation in iPP/OBC blend proceeded gradually. The mesophase content and degree of orientation of iPP matrix in iPP/OBC blend were much lower than that in neat iPP within the investigated strain range. By the combination of scattering results and morphological observations, a deformation mechanism based on strain distribution and fracture mechanics was proposed. (c) 2013 Elsevier Ltd. All rights reserved.

引用

页码：1440 / 1447

页数：8

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