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Colloid and Polymer Science
Published in: Colloid and Polymer Science 5/2012

01-03-2012 | Short Communication

Effect of co-unit type in random propylene copolymers on the kinetics of mesophase formation and crystallization

Authors: Daniela Mileva, René Androsch

Published in: Colloid and Polymer Science | Issue 5/2012

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Abstract

Fast scanning chip calorimetry has been employed to study the effect of the type and concentration of co-units on the rate of mesophase formation and crystallization in random isotactic copolymers of propylene and 1-alkenes, including ethylene, 1-butene, 1-hexene, and 1-octene. The dependence of the rate of ordering on temperature of the propylene homopolymer shows two distinct maxima around 300 and 340–350 K which are related to mesophase formation and crystallization, respectively. Addition of 1-alkene co-units leads to a decrease of the maximum rate of both crystallization and mesophase formation. At comparable temperature and molar percentage of co-units in the propylene chain, ethylene, and 1-butene co-units cause less reduction of the maximum rate of ordering than 1-hexene or 1-octene co-units. The experimental observations are discussed in the context of possible incorporation of these chain defects into the ordered structures.
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Metadata
Title
Effect of co-unit type in random propylene copolymers on the kinetics of mesophase formation and crystallization
Authors
Daniela Mileva
René Androsch
Publication date
01-03-2012
Publisher
Springer-Verlag
Published in
Colloid and Polymer Science / Issue 5/2012
Print ISSN: 0303-402X
Electronic ISSN: 1435-1536
DOI
https://doi.org/10.1007/s00396-011-2576-8

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