Prediction of the flow-induced crystallization in high-density polyethylene by a continuum model

Yu, Fengyuan, Zhang, Hongbin, Wang, Zhigang, Yu, Wei and Zhou, Chixing (2009) Prediction of the flow-induced crystallization in high-density polyethylene by a continuum model. Journal of Polymer Science Part B-Polymer Physics, 47 5: 531-538. doi:10.1002/polb.21660


Author Yu, Fengyuan
Zhang, Hongbin
Wang, Zhigang
Yu, Wei
Zhou, Chixing
Title Prediction of the flow-induced crystallization in high-density polyethylene by a continuum model
Journal name Journal of Polymer Science Part B-Polymer Physics   Check publisher's open access policy
ISSN 0887-6266
1099-0488
Publication date 2009-03
Year available 2009
Sub-type Article (original research)
DOI 10.1002/polb.21660
Volume 47
Issue 5
Start page 531
End page 538
Total pages 8
Place of publication Hoboken, NJ United States
Publisher John Wiley and Sons
Collection year 2010
Language eng
Formatted abstract
In this work, the isothermal flow-induced crystallization (FIC) of highdensity polyethylene (HDPE) under a simple shear flow was investigated. Two experimental modes, including steady shear and preshear treatment, were performed on the polymer melt. Based on the nonequilibrium thermodynamic theory, the FIC process of HDPE was predicted through the modification of a continuum FIC model. The theoretical predictions of the evolution of both the viscosity in steady shear flow and the complex modulus under preshear treatment were essentially related to the crystallinity of HDPE, in agreement with the experimental findings. Both experimental and predicted results showed that the applied flow field could accelerate the crystallization kinetics of HDPE significantly. However, the effect of the intensity of shear flow on the crystallization of HDPE was finite, showing a saturation phenomenon, namely, the accelerated degree of crystallization tending to level off when the shear rate was large enough. In additional, it was found that the predicted crystallinity of HDPE was very low in induction period either in steady shear flow or by preshear treatment
Keyword Crystallization
Crystallization kinetics
Kinetics
Polyethylene
Preshear flow
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collection: School of Chemistry and Molecular Biosciences
 
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Created: Tue, 04 Jun 2013, 14:35:16 EST by Fengyuan Yu on behalf of School of Chemistry & Molecular Biosciences