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Cocrystallization of Blends of Ethylene/1-Olefin Copolymers: An Investigation with Crystallization Analysis Fractionation (Crystaf)

✍ Scribed by Siripon Anantawaraskul; João B. P. Soares; Paula M. Wood-Adams

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
150 KB
Volume
205
Category
Article
ISSN
1022-1352

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✦ Synopsis

Abstract

Summary: 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.

Crystaf analysis of blends of copolymers.

magnified imageCrystaf analysis of blends of copolymers.

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Cocrystallization of ethylene/1-octene c
Cocrystallization of ethylene/1-octene copolymer blends during crystallization analysis fractionation and crystallization elution fractionation
✍ Kanokpon Suriya; Siripon Anantawaraskul; João B. P. Soares 📂 Article 📅 2011 🏛 John Wiley and Sons 🌐 English ⚖ 782 KB

## Abstract Blending of ethylene/1‐octene copolymers can be used to achieve a well‐controlled broad chemical composition distribution (CCD) required in several polyolefin applications. The CCD of copolymer blends can be estimated using crystallization analysis fractionation (CRYSTAF) or crystalliza