Effect of Hyperbranched Polymer on Crystallization Kinetics of Isotactic Polypropylene

Guang Tian Liu; Jing Lei

doi:10.4028/www.scientific.net/AMR.535-537.1142

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 535-537Effect of Hyperbranched Polymer on Crystallization...

Effect of Hyperbranched Polymer on Crystallization Kinetics of Isotactic Polypropylene

Abstract:

In this paper, the isothermal crystallization kinetics of isotactic polypropylene (iPP) and iPP with 5% hyperbranched polymer (HBP) added had been investigated by differential scanning calorimetry (DSC). The results show that a small addition of HBP affects the crystallization behavior of iPP. During isothermal crystallization, the crystallization rate of the blend is higher than those of iPP remarkably. An increase in the Avrami exponent may be attributed to the fractal structure of hyperbranched polymer. The crystallization activation energy is estimated by the Friedman equation, the results show that the activation energy decreases remarkably by addition of HBP and the crystallization rate of the blend is more sensitive to temperature than that of iPP.

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Periodical:

Advanced Materials Research (Volumes 535-537)

Pages:

1142-1145

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.535-537.1142

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Online since:

June 2012

Authors:

Guang Tian Liu, Jing Lei

Keywords:

Blend, Crystallization Kinetics, DSC, Hyperbranched Polymer, Polypropylene (PP)

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