Crystallizability of ethylene homopolymers by crystallization analysis fractionation

被引：32
作者：
Nieto, J
Oswald, T
Blanco, F
Soares, JBP [1 ]
Monrabal, B
机构：
[1] Univ Waterloo, Dept Chem Engn, Polymer Res Inst, Waterloo, ON N2L 3G1, Canada
[2] PolymerChar S A, Valencia, Spain
[3] Dow Chem Co USA, Freeport, TX 77541 USA
[4] Dow Chem Iber S A, Tarragona 43006, Spain
来源：
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS | 2001年 / 39卷 / 14期
关键词：
crystallization analysis fractionation (CRYSTAF); temperature rising elution fractionation (TREF); long-chain branching; polyethylene; constrained geometry catalysts;
D O I：
10.1002/polb.1133
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The effect of molecular weight and long-chain branching on the crystallization analysis fractionation (CRYSTAF) of ethylene homopolymers was investigated. Several ethylene homopolymers were prepared with different molecular weights and levels of long-chain branching to isolate these effects from the dominant effect of comonomer content on crystallizability measured by CRYSTAF. Molecular weight effects might be significant for samples with number-average molecular weights below 5000, but this effect can be corrected if terminal methyl groups are taken into account. Long-chain branching has only a very small effect on the CRYSTAF profile of the samples investigated in this study. (C) 2001 John Wiley & Sons.
引用
收藏
页码：1616 / 1628
页数：13
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