Nucleation effect on polymorphism of melt-crystallized syndiotactic polystyrene

作者：Lu Ming; Zhao Xiang; Chen Lan; Xiong Xiaomin; Zhang Jingxiu; Mai Kancheng^*; Wu Chuanbin

来源：Polymer, 2011, 52(4): 1102-1106.

DOI：10.1016/j.polymer.2010.11.053

• Syndiotactic polystyrene
• Nucleation barrier
• Nucleating agent

The main purpose of this study is to examine the effect of nucleation on the formation of polymorphism in melt-crystallized syndiotactic polystyrene (sPS). By depressing the nucleation barrier (i.e., introducing nucleating agent), the tendency of forming, a metastable crystalline phase, alpha crystal, significantly increased. The metastability of crystalline phase was dependent upon the nucleation process in which the lower nucleation barrier led to the formation of metastable phase. Consistently, by crystallizing under shearing, the formation of alpha crystal dominated the crystalline polymorphism. Herein we suggest a practical method to control the polymorphism of melt-crystallized sPS.

• 出版日期2011-2-17
• 单位中山大学