Nonisothermal crystallization and melting behavior of β-nucleated isotactic polypropylene and polyamide 66 blends

Yang, Z. and Mai, K. (2011) Nonisothermal crystallization and melting behavior of β-nucleated isotactic polypropylene and polyamide 66 blends. Journal of Applied Polymer Science, 119(6), pp. 3566-3573. (doi:10.1002/app.33040)

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Abstract

A highly novel nano-CaCO3 supported β-nucleating agent was employed to prepare β-nucleated isotactic polypropylene (iPP) blend with polyamide (PA) 66, β-nucleated iPP/PA66 blend, as well as its compatibilized version with maleic anhydride grafted PP (PP-g-MA), maleic anhydride grafted polyethylene-octene (POE-g-MA), and polyethylene-vinyl acetate (EVA-g-MA), respectively. Nonisothermal crystallization behavior and melting characteristics of β-nucleated iPP and its blends were investigated by differential scanning calorimeter and wide angle X-ray diffraction. Experimental results indicated that the crystallization temperature (Tmath image) of PP shifts to high temperature in the non-nucleated PP/PA66 blends because of the α-nucleating effect of PA66. Tmath image of PP and the β-crystal content (Kβ) in β-nucleated iPP/PA66 blends not only depended on the PA66 content, but also on the compatibilizer type. Addition of PP-g-MA and POE-g-MA into β-nucleated iPP/PA66 blends increased the β-crystal content; however, EVA-g-MA is not benefit for the formation of β-crystal in the compatibilized β-nucleated iPP/PA66 blend. It can be relative to the different interfacial interactions between PP and compatibilizers. The nonisothermal crystallization kinetics of PP in the blends was evaluated by Mo's method.

Item Type:Articles
Status:Published
Refereed:Yes
Glasgow Author(s) Enlighten ID:Yang, Dr Zhugen
Authors: Yang, Z., and Mai, K.
College/School:College of Science and Engineering > School of Engineering > Biomedical Engineering
Journal Name:Journal of Applied Polymer Science
Publisher:Wiley
ISSN:0021-8995
ISSN (Online):1097-4628
Published Online:30 September 2010

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