Flow-induced crystallization in poly-1-butene: the shish-kebab transition

被引：12
|
作者：
Van Puyvelde, P. [1 ]
Langouche, F. [2 ]
Baert, J. [1 ]
机构：
[1] Katholieke Univ Leuven, Dept Chem Engn, B-3001 Louvain, Belgium
[2] Solvay Cent Lab, B-1120 Brussels, Belgium
来源：
INTERNATIONAL JOURNAL OF MATERIAL FORMING | 2008年 / 1卷 / Suppl 1期
关键词：
Flow-induced crystallization; Birefringence; Shish-kebab; Critical work;
D O I：
10.1007/s12289-008-0303-x
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
In this work, flow-birefringence measurements have been performed to monitor the orientation development during application of high shear flow in undercooled polymer melts. It is demonstrated that a critical shear rate and a critical shear strain are required in order to form strongly oriented shish-kebab structures. After reaching such critical conditions, the crystallization kinetics - measured both by means of birefringence as well as transmitted intensity measurements - is drastically increased. The results generated in this work suggest that Janeschitz-Kriegl's [1] hypothesis about the need for a specific amount of work required to form shish-kebab structures is valid, at least for the conditions investigated.
引用
收藏
页码：667 / 670
页数：4
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