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Crystallisation regimes and reptation in isotactic polypropylene molecular weight fractions

Ibhadon, Alex

Authors

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Dr Alex Ibhadon A.O.Ibhadon@hull.ac.uk
Reader in Catalysis and Reactor Engineering



Abstract

Crystal growth rate data based on the kinetic nucleation theory of chain folding and the effect of reptation, have been used to predict the rate of crystal growth at moderate to high supercoolings in iPP molecular weight fractions. Growth rate data obtained for the fractions seem to be in agreement with the theoretical predictions of the regime theory. However, an extension of the gambler ruin treatment to the iPP data has not been successful with regard to the dominant morphology in regime II. The variable cluster model suggested as the morphology for polyethylene in regime II does not appear to be evident from this study. The effect of polydispersity, molecular weight, and tacticity on the crystallization behavior of iPP fractions have also been studied and correlated with the structure of polymer samples investigated.

Journal Article Type Article
Publication Date Jan 24, 1999
Print ISSN 0021-8995
Publisher Wiley
Peer Reviewed Peer Reviewed
Volume 71
Issue 4
Pages 579 - 584
APA6 Citation Ibhadon, A. (1999). Crystallisation regimes and reptation in isotactic polypropylene molecular weight fractions. Journal of Applied Polymer Science, 71(4), 579 - 584. https://doi.org/10.1002...AID-APP9%3E3.0.CO%3B2-6
DOI https://doi.org/10.1002/%28SICI%291097-4628%2819990124%2971%3A4%3C579%3A%3AAID-APP9%3E3.0.CO%3B2-6
Keywords Reptation; Molecular weight crystallization; Regime; Fractions
Publisher URL https://onlinelibrary.wiley.com/doi/abs/10.1002/%28SICI%291097-4628%2819990124%2971%3A4%3C579%3A%3AAID-APP9%3E3.0.CO%3B2-6
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