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

页码：1616 / 1628

页数：13

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