Cocrystallization of blends of ethylene/1-olefin copolymers: An investigation with crystallization analysis fractionation (Crystaf)

被引：35

作者：

Anantawaraskul, S

Soares, JBP

Wood-Adams, PM

机构：

[1] McGill Univ, Dept Chem Engn, Montreal, PQ H3A 2B2, Canada

[2] Univ Waterloo, Dept Chem Engn, Polymer Res Inst, Waterloo, ON N2L 3G1, Canada

[3] Concordia Univ, Dept Mech & Ind Engn, Montreal, PQ H3G 1M8, Canada

来源：

MACROMOLECULAR CHEMISTRY AND PHYSICS | 2004年 / 205卷 / 06期

关键词：

chemical composition distribution; cocrystallization; crystallization analysis fractionation (Crystaf); polyethylene (PE); polyolefins;

D O I：

10.1002/macp.200300116

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Crystallization analysis fractionation (Crystaf) is a technique for estimating the chemical composition distribution (CCD) of semi-crystalline copolymers. Cocrystallization may happen during Crystaf analysis, affecting Crystaf profiles and leading to misinterpretation of the CCD. This study investigates this phenomenon and determines the main factors leading to cocrystallization by analyzing a series of ethylene/1-olefin copolymers. We considered three factors affecting cocrystallization: comonomer type, cooling rate and chain crystallizability. The results showed that cooling rate and similarity in chain crystallizability are the key factors regulating cocrystallization during Crystaf analysis.

引用

页码：771 / 777

页数：7

共 18 条

[1] Effect of operation parameters on temperature rising elution fractionation and crystallization analysis fractionation [J].