Stretching induced phase separation in poly(vinylidene fluoride)/poly(butylene succinate) blends studied by in-situ X-ray scattering

被引：29

作者：

Liu, Guoming ^{[1
]}

Schneider, Konrad ^{[2
]}

Zheng, Liuchun ^{[1
]}

Zhang, Xiuqin ^{[3
]}

Li, Chuncheng ^{[1
]}

Stamm, Manfred ^{[2
]}

Wang, Dujin ^{[1
]}

机构：

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

[2] Leibniz Inst Polymerforsch Dresden eV, D-01069 Dresden, Germany

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

来源：

POLYMER | 2014年 / 55卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Poly(vinylidene fluoride); Poly(butylene succinate); Stretching induced phase separation; 3 CRYSTALLINE FORMS; POLYMER BLENDS; SMALL-ANGLE; POLY(BUTYLENE SUCCINATE); POLY(ETHYLENE OXIDE); MOLECULAR-WEIGHT; INTERPENETRATED SPHERULITES; SPINODAL DECOMPOSITION; DEFORMATION-BEHAVIOR; LIGHT-SCATTERING;

D O I：

10.1016/j.polymer.2014.03.055

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 structure evolution of poly(vinylidene fluoride)/poly(butylene succinate) (PVDF/PBS) blends during stretching above the melting point of PBS is investigated by synchrotron-based simultaneous wide angle and small angle X-ray scattering (WAXS/SAXS). Before stretching, PVDF crystallizes into the a-form, whereas the chains of molten PBS locate at the inter-lamellar amorphous phase of PVDF. Crystal transition from a to beta of PVDF is observed in all samples during stretching. The morphological transformation from a lamellar structure into a fibrillar structure occurs at low and intermediate strains. With further deformation, a "stretching induced phase separation" phenomenon is observed. The final microstructure of PVDF/PBS blends contains PVDF microfibrils with PBS chains preferentially distributed in the interfibrillar region. The PBS molecular weight influences the onset and end strain for the transition. A new "two-step model" is proposed to describe the deformation process. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：2588 / 2596

页数：9

共 55 条

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