How temperatures affect the number of dislocations in polymer single crystals

被引：13

作者：

Liu, Xiao ^{[1
]}

Wei, Qian-shi ^{[2
]}

Chai, Li-guo ^{[3
]}

Zhou, Jian-jun ^{[1
]}

Huo, Hong ^{[1
]}

Yan, Da-dong ^{[2
]}

Yan, Shou-ke ^{[3
]}

Xu, Jun ^{[4
]}

Li, Lin ^{[1
]}

机构：

[1] Beijing Normal Univ, Coll Chem, Beijing Key Lab Energy Convers & Storage Mat, Beijing 100875, Peoples R China

[2] Beijing Normal Univ, Dept Phys, Beijing 100875, Peoples R China

[3] Beijing Univ Chem Technol, State Key Lab Chem Resource Engn, Beijing 100029, Peoples R China

[4] Tsinghua Univ, Dept Chem Engn, Adv Mat Lab, Beijing 100084, Peoples R China

来源：

CHINESE JOURNAL OF POLYMER SCIENCE | 2017年 / 35卷 / 01期

基金：

国家高技术研究发展计划(863计划); 中国国家自然科学基金;

关键词：

Dislocation; Spiral growth; Single crystal; Nucleation; SCREW DISLOCATIONS; ENZYMATIC DEGRADATION; AFM OBSERVATION; SPIRAL GROWTH; MORPHOLOGY; POLYETHYLENE; CRYSTALLIZATION; MELT; POLYESTERS; SURFACES;

D O I：

10.1007/s10118-017-1872-2

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 influence of crystallization temperature (T (c)) on the number of spiral growths on poly(butylene succinate) (PBS) single crystals, obtained by self-seeding method, was systematically studied. The studies show that the statistical average number of spiral growths formed on the PBS single crystals decays exponentially with respect to the Tc. Inspired by BCF (Bruton, Cabrera and Frank) theory and L-H (Lauritzen and Hoffman) theory, a thermodynamic model has been proposed, in which the origin of spiral growth was treated as a nucleation process. The model suggests that the nucleation rate of spiral growth depends on the inverse square of super-cooling degree, which predicted the density of spiral growth formed on lamellae, and was consistent with the experiments very well.

引用

页码：78 / 86

页数：9

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