Crystallization behavior and melting characteristics of PP nucleated by a novel supported β-nucleating agent

Zhang, Z., Wang, C., Yang, Z. , Chen, C. and Mai, K. (2008) Crystallization behavior and melting characteristics of PP nucleated by a novel supported β-nucleating agent. Polymer, 49(23), pp. 5137-5145. (doi:10.1016/j.polymer.2008.09.009)

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Abstract

The β-nucleated PP with high β-PP content was prepared by a novel supported β-nucleating agent, which was prepared with pimelic acid supported on nano-CaCO3 as support. The influences of the content of the support and supported β-nucleating agent, pre-melting temperature (Tmelt) and scan rates on crystallization behavior and melting characteristics, and the β-PP content of β-nucleated PP were determined by Differential Scanning Calorimeter (DSC) and Wide-Angle X-ray Diffraction (WAXD). The results indicated that the addition of supported β-nucleating agent markedly increased the crystallization temperature (Tc) of PP. Increasing the content of supported β-nucleating agent slightly increased the Tc, but had no influence on the melting temperatures (Tm) of β-nucleated PP. The Tc and Tm of β-nucleated PP decreased slightly with increasing the content of the support nano-CaCO3. The effects of scan rates and multiple scans with different Tmelt on the crystallization and melting behavior of PP nucleated by supported β-nucleating agent are similar to that of PP nucleated by calcium pimelate (CaHA). The β-PP content above 90 percent was obtained in PP nucleated by supported β-nucleating agent and was not influenced by the content of nano-CaCO3. The supported β-nucleating agent prepared by supporting pimelic acid on nano-CaCO3 is a β-nucleating agent with high efficiency and selectivity, and low cost.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Yang, Dr Zhugen
Authors: Zhang, Z., Wang, C., Yang, Z., Chen, C., and Mai, K.
College/School:College of Science and Engineering > School of Engineering > Biomedical Engineering
Journal Name:Polymer
Publisher:Elsevier
ISSN:0032-3861
ISSN (Online):1873-2291

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