Nonisothermal Crystallization of Recycled Poly(Ethylene Terephthalate)/Poly(Ethylene Octene) Blends |
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| Authors: | Yongjun Liu Weihong Guo Zhizhong Su Binyao Li Chifei Wu |
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| Institution: | 1. School of Material Science and Engineering , East China University of Science and Technology , Shanghai, China;2. College of Chemistry and Chemical Engineering , Jiangxi Normal University , Nanchang, China;3. School of Material Science and Engineering , East China University of Science and Technology , Shanghai, China |
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| Abstract: | Recycled poly(ethylene terephthalate) (r-PET) was blended with poly(ethylene octene) (POE) and glycidyl methacrylate grafted poly(ethylene octene) (mPOE). The nonisothermal crystallization behavior of r-PET, r-PET/POE, and r-PET/mPOE blends was investigated using differential scanning calorimetry (DSC). The crystallization peak temperatures (T p ) of the r-PET/POE and r-PET/mPOE blends were higher than that of r-PET at various cooling rates. Furthermore, the half-time for crystallization (t 1/2 ) decreased in the r-PET/POE and r-PET/mPOE blends, implying the nucleating role of POE and mPOE. The mPOE had lower nucleation activity than POE because the in situ formed copolymer PET-g-POE in the PET/mPOE blend restricted the movement of PET chains. Non-isothermal crystallization kinetics analysis was carried out based on the modified Avrami equation, the Ozawa equation, and the Mo method. It was found that the Mo method provided a better fit for the experimental data for all samples. The effective energy barriers for nonisothermal crystallization of r-PET and its blends were determined by the Kissinger method. |
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| Keywords: | nonisothermal crystallization recycled poly(ethylene terephthalate) poly(ethylene octene) crystallization kinetics analysis |
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