Recrystallization of shish-kebab structures induced by self-seeding nucleation

被引：10

作者：

Liu, Kejun ^{[1
]}

Zhang, Lei ^{[1
]}

Liu, Hong ^{[1
]}

Deng, Peng ^{[1
]}

Du, Hainan ^{[1
]}

Li, Xinpeng ^{[1
]}

Zhang, Jie ^{[1
]}

机构：

[1] Sichuan Univ, State Key Lab Polymer Mat Engn, Coll Polymer Sci & Engn, Chengdu 610065, Sichuan, Peoples R China

来源：

MATERIALS LETTERS | 2013年 / 90卷

基金：

中国国家自然科学基金;

关键词：

IPP; UHMWPE; Shish-kebab; Recrystallization; Crystal structure; Epitaxial growth; SHEAR-INDUCED CRYSTALLIZATION; ISOTACTIC POLYPROPYLENE;

D O I：

10.1016/j.matlet.2012.09.032

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This article reports melting and recrystallization of shish-kebab (cylindrite) structures in isotactic polypropylene containing high-content (15%wt) of ultra-high molecular weight polyethylene (UHMWPE). UHMWPE molecules can decrease the free volume of iPP molecules, which result in a great improvement of thermodynamic stability of shish. Therefore, some oriented structures can reappear due to inducement of two different kinds of shish (self-seeding nucleation of iPP), which are found with different morphology: One is threadlike, the other is nuclei-row. The way they absorb epitaxial growth of kebab is also different. It can be concluded that two different mechanisms of shish-kebab recrystallization exist. This work provides a new understanding of the formation of shish-kebab structure. (c) 2012 Elsevier B.V. All rights reserved.

引用

页码：145 / 147

页数：3

共 12 条

[1] Shear-induced crystallization of isotactic polypropylene within the oriented scaffold of noncrystalline ultrahigh molecular weight polyethylene [J].