Surface Stress Effects on the Bending Direction and Twisting Chirality of Lamellar Crystals of Chiral Polymer

被引：97

作者：

Ye, Hai-Mu ^{[1
]}

Wang, Jian-Shan ^{[2
]}

Tang, Shuo ^{[1
]}

Xu, Jun ^{[1
]}

Feng, Xi-Qiao ^{[2
]}

Guo, Bao-Hua ^{[1
]}

Xie, Xu-Ming ^{[1
]}

Zhou, Jian-Jun ^{[3
]}

Li, Lin ^{[3
]}

Wu, Qiong ^{[4
]}

Chen, Guo-Qiang ^{[4
]}

机构：

[1] Tsinghua Univ, Sch Mat Sci & Technol, Dept Chem Engn, Inst Polymer Sci & Engn, Beijing 100084, Peoples R China

[2] Tsinghua Univ, Dept Engn Mech, Inst Biomech & Med Engn, Beijing 100084, Peoples R China

[3] Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing 100080, Peoples R China

[4] Tsinghua Univ, Dept Biol Sci & Biotechnol, Beijing 100084, Peoples R China

来源：

MACROMOLECULES | 2010年 / 43卷 / 13期

基金：

中国国家自然科学基金;

关键词：

ATOMIC-FORCE MICROSCOPY; COMONOMER COMPOSITIONAL DISTRIBUTION; OPTICALLY-ACTIVE POLYETHERS; MAIN-CHAIN CHIRALITY; SINGLE-CRYSTALS; THERMAL-CHARACTERISTICS; BANDED SPHERULITES; COPOLYMER; POLY(3-HYDROXYBUTYRATE-CO-3-HYDROXYHEXANOATE); CRYSTALLIZATION;

D O I：

10.1021/ma100920u

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Expression of chirality in the highly ordered assembly structures of various types of mutual and synthetic materials is still a mystery Although surface stresses have been known to widely exist in polymer lamellae, how they affect the twisting chirality is yet an unsolved issue Here we report inversion of the lamellar twisting chirality of microbial poly( R-3-hydroxybutyrate) copolymers from left-handed to right-handed via copolymerization or blending, with the molecular chirality and the structures in the crystalline core unchanged We interpret the observed inversion of twisting chirality and the complicated lamellar curvature with a continuum model based on surface elasticity theory Quantitative simulations reveal that the distribution of the anisotropic surface stresses and the surface elasticity property of the lamellae significantly affect the morphological chirality of lamellar twisting For different chiral polymers, the same bending direction may correlate to the opposite twisting chirality

引用

页码：5762 / 5770

页数：9

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