Non-isothermal Crystallization Kinetics of Poly (Ethylene Terephthalate)/Grafted Carbon Black Composite |
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Authors: | Xianhui Li Weihong Guo Qilin Zhou Shiai Xu Chifei Wu |
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Affiliation: | (1) Polymer Alloy Laboratory, School of Materials Science and Engineering, East China University of Science and Technology, 200237 Shanghai, P.R. China |
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Abstract: | Summary The grafted carbon black (GCB) was prepared by in-situ grafting low molecular weight compound on the surface of carbon black (CB) using a new technique. Poly(ethylene terephthalate)/grafted
carbon black (PET/GCB) and poly(ethylene terephthalate)/ carbon black (PET/CB) composites were prepared by melt blending.
The non-isothermal crystallization process of virgin Poly(ethylene terephthalate)(PET), PET/CB, and PET/GCB composites were
investigated by differential scanning calorimetry (DSC), and the non-isothermal crystallization kinetics was analyzed using
different approaches, i.e. modified Avrami equation, Ozawa equation and the method developed by Liu. The effective energy
barrier ΔE of virgin PET, PET/CB, and PET/GCB composites were calculated using the differential iso-conversional method. All
of the results showed that GCB and CB acted as nucleating agents and increased the crystallization rate of PET. Compared with
CB, GCB was a more effective nucleator for PET. |
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