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Non-isothermal crystallization kinetics of poly(ethylene terephthalate)/mica composites |
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| Authors: | Xintu Lin Huaji Zhang Meizhen Ke Liren Xiao Dongqiang Zuo Qingrong Qian Qinghua Chen |
| Affiliation: | 1. College of Materials Science and Engineering, Fujian Normal University, Fuzhou, 350007, China 2. College of Environmental Science and Engineering, Fujian Normal University, Fuzhou, 350007, China 3. Fujian Key Laboratory of Pollution Control and Resource Reuse, Fuzhou, 350007, China |
| Abstract: | The non-isothermal crystallization kinetics of pure poly(ethylene terephthalate) (PET), PET/mica and PET/TiO2-coated mica composites were investigated by differential scanning calorimetry with different theoretical models, including the modified Avrami method, Ozawa method and Mo method. The activation energies of non-isothermal crystallization were calculated by Kissinger method and Flynn–Wall–Ozawa method. The results show that the modified Avrami equation and Ozawa theory fail to describe the non-isothermal crystallization behavior of all composites, while the Mo model fits the experiment data fair well. It is also found that the mica and TiO2-coated mica could act as heterogeneous nucleating agent and accelerate the crystallization rates of PET, and the effect of TiO2-coated mica is stronger than that of mica. The result is further reinforced by calculating the effective activation energy of the non-isothermal crystallization process for all composites using the Kissinger method and the Flynn–Wall–Ozawa method. |
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