Modeling of flow-induced crystallization in blends of isotactic polypropylene and poly(ethylene-co-octene)

Yu, Fengyuan, Zhang, Zinan, Yu, Wei, Zhou, Chixing and Zhang, Hongbin (2012) Modeling of flow-induced crystallization in blends of isotactic polypropylene and poly(ethylene-co-octene). Polymer International, 61 9: 1389-1393. doi:10.1002/pi.4220


Author Yu, Fengyuan
Zhang, Zinan
Yu, Wei
Zhou, Chixing
Zhang, Hongbin
Title Modeling of flow-induced crystallization in blends of isotactic polypropylene and poly(ethylene-co-octene)
Formatted title
Modeling of flow-induced crystallization in blends of isotactic polypropylene and poly(ethylene-co-octene)
Journal name Polymer International   Check publisher's open access policy
ISSN 0959-8103
1097-0126
Publication date 2012-09
Year available 2012
Sub-type Article (original research)
DOI 10.1002/pi.4220
Volume 61
Issue 9
Start page 1389
End page 1393
Total pages 5
Place of publication Chichester, West Sussex, United Kingdom
Publisher John Wiley & Sons
Collection year 2013
Language eng
Formatted abstract
Poly(ethylene-co-octene) (PEOc) has been shown to provide a high toughening contribution to isotactic polypropylene (iPP). The theoretical modeling of flow-induced crystallization (FIC) of blends of iPP and PEOc is not much reported in the literature. The aim of the present work is to clarify the FIC of iPP upon addition of PEOc in terms of theoretical modeling. The crystallization of iPP and PEOc blends in flow is simulated by a modified FIC model based on the conformation tensor theory. Two kinds of flow fields, shear flow and elongational flow, are considered in the prediction to analyze the influence of flow field on the crystallization kinetics of the polymer. The simulation results show that the elongation flow is much more effective than shear flow in reducing the dimensionless induction time of polymer crystallization. In addition, the induction time of crystallization in the blends is sensitive to the change of shear rate. In comparison with experimental data, the modified model shows its validity for the prediction of the induction time of crystallization of iPP in the blends. Moreover, the simulated relaxation time for the blends becomes longer with increasing percentage of PEOc in the blends.
Keyword Polypropylene
Flow-induced crystallization
Model
Blend
Crystallization kinetics
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Chemical Engineering Publications
Non HERDC
 
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Created: Tue, 04 Jun 2013, 14:26:00 EST by Fengyuan Yu on behalf of School of Chemical Engineering