How Temperatures Affect the Number of Dislocations in Polymer Single Crystals  

作　　者：Xiao Liu Qian-shi Wei Li-guo Chai 周建军 Hong Huo Da-dong Yan Shou-ke Yan Jun Xu 李林 

机构地区：[1]Beijing Key Laboratory of Energy Conversion and Storage Materials, College of Chemistry, Beijing Normal University, Beijing 100875, China [2]Department of Physics, Beijing Normal University, Beijing 100875, China [3]State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China [4]Advanced Materials Laboratory, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China

出　　处：《Chinese Journal of Polymer Science》2017年第1期78-86,共9页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(No.21434003),the National Natural Science Foundation of China(No.21374054);the National High Technology Research and Development Program of China(No.2015AA033801);the National Science and Technology Major Project of the Ministry of Science and Technology of China(No.2013ZX09J13110-11B);the Fundamental Research Funds for the Central Universities;the Program for Changjiang Scholars and Innovative Research Team in University;the Sino-German Center for Research Promotion

摘　　要：The influence of crystallization temperature （Tc） 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 To. 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.The influence of crystallization temperature （Tc） 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 To. 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.

关 键 词：DISLOCATION Spiral growth Single crystal NUCLEATION 

分 类 号：O631.1[理学—高分子化学]