Crystallization Kinetics of Polypropylene and Poly (butyl methacrylate-co-hydroxyethyl methacrylate) Blend |
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| Authors: | Jian Zhao Changfa Xiao Zhiying Zhang |
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| Institution: | 1. School of Textiles , Tianjin Polytechnic University , Tianjin , China;2. Key Laboratory of Advanced Textile Composites , Ministry of Education of China , Tianjin , China;3. Institute for Frontier Materials (IFM) , Deakin University , Australia;4. School of Materials Science and Engineering , Tianjin Polytechnic University , Tianjin , China;5. Key Laboratory of Advanced Textile Composites , Ministry of Education of China , Tianjin , China;6. School of Materials Science and Engineering , Tianjin Polytechnic University , Tianjin , China |
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| Abstract: | The crystallization kinetics of polypropylene and poly (butyl methacrylate-co-hydroxyethyl methacrylate) blend was investigated with differential scanning calorimetry. The isothermal crystallization analysis based on the Avrami theory indicated a heterogeneous nucleating effect from the copolymer. A systematic study of the nonisothermal crystallization kinetics was undertaken using the Avrami equation and its later modifications by Ozawa, Mo, and Zhang. The results demonstrated that the linear relationship failed in the different cooling rates because the Avrami method did not take into account that the crystallization temperature was lowered continuously. The Ozawa and Mo methods could be successful in describing the overall nonisothermal process of polypropylene and the blend. In addition, the nonisothermal crystallization energy values were estimated by the Kissinger and Freidman models. There are two mutually opposite effects on the crystallization behavior of the blend: nucleation ability and growth retardation. |
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| Keywords: | Isothermal crystallization Nonisothermal crystallization P(BMA-co-HEMA) Polypropylene |
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