Flow-induced crystallization of PB-1: From the low shear rate region up to processing rates

被引：70
作者：
Baert, Jimmy
Van Puyvelde, Peter
Langouche, Florentin
机构：
[1] Katholieke Univ Leuven, Dept Chem Engn, B-3001 Louvain, Belgium
[2] Solvay Cent Lab, B-1120 Brussels, Belgium
来源：
MACROMOLECULES | 2006年 / 39卷 / 26期
关键词：
ISOTACTIC POLYPROPYLENE; MOLECULAR-WEIGHT; ENHANCED CRYSTALLIZATION; POLYMER MELTS; I-PP; POLYBUTENE-1; POLY(1-BUTENE); KINETICS; TRANSFORMATION; MORPHOLOGY;
D O I：
10.1021/ma062068q
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
In this work a global view of flow-induced orientation in isotactic PB-1 is presented. The shear cell used in this work submits the sample to a homogeneous flow field and can be operated from the low shear rate region up into the highly oriented regime close to industrial processing conditions. For varying levels of shear rate and shear strain and for several crystallization temperatures, the transmitted intensity and birefringence are measured throughout the complete crystallization process and characteristic crystallization times are defined. Different regimes of flow-induced crystallization are observed as a function of an increased level of molecular orientation and stretch. Results concerning the Fase II to Fase I transformation in PB-1 are also presented.
引用
收藏
页码：9215 / 9222
页数：8
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