Distribution of α-, β-, and γ-Phases in a Multi-flow Injection-molded Hierarchical Structure

作     者：Da-Shan Mi Feng-Yi Hou Man Zhou Jie Zhang 

作者机构：College of Polymer Science and EngineeringState Key Laboratory of Polymer Materials EngineeringSichuan University 

出 版 物：《Chinese Journal of Polymer Science》 (高分子科学（英文版）)

年 卷 期：2018年第36卷第6期

页      面：765-775页

核心收录：

学科分类：08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：Shanghai Synchrotron Radiation Facility 

主　　题：Shish kebab Growth competition α Phase γ Phase β Phase 

摘      要：In the current work, a custom-made vibration injection molding device that can provide oscillatory pressure was utilized to create an injection-molded hierarchical structure. Growth competition among α, β, and γ phases in the injection-molded structure can be studied because of the presence of this hierarchical structure, wherein shish-kebab and spherulite layers were arranged alternately along the thickness direction. The γ crystals only existed in layers subjected to high pressure and shear stress, whereas β crystals formed between the shear layers. The change in trend of the γ fraction was similar to that of parent-to-daughter ratio. In addition, this hierarchical and alternating crystal structure can sharply increase the mechanical properties.