Title: Studies on crystallization and melting behaviors of UHMWPE/MWNTs nanocomposites with reduced chain entanglements
Page Range: p.495-506
Author(s): Guoyong Xu; Qingren Zhu
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Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 25
Issue No: No.6
Abstract
The nonisothermal crystallisation and melting behaviour of UHMWPE (ultra-high molecular weight polyethylene)/ MWNTs (multi-walled carbon nanotubes) nanocomposites with reduced chain entanglements was studied using differential scanning calorimetry (DSC) technique. The Ozawa approach failed to describe the crystallisation behaviour of nanocomposites, whereas the modified Avrami analysis could explain the behaviour of UHMWPE/ MWNTs nanocomposite to some extent. A novel kinetic model by Liu et al. was able to satisfactorily describe the crystallisation behaviour of UHMWPE/MWNTs nanocomposites. The Dobreva and Kissinger methods failed to calculate the nucleation activity and activation energy, respectively, for the UHMWPE/MWNTs systems. Also the Vyazovkin model-free kinetic method was applied to nonisothermal crystallisation to evaluate the dependence of the effective activation energy on conversion and temperature. 30 Refs.
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