| MELTING CRYSTALLIZATION BEHAVIOR OF NYLON 66 |
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| 作者姓名： | Qing-xin Zhang Zhi-shen Mo State Key Laboratory of Polymer Physics & Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences Changchun China |
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| 作者单位： | Qing-xin Zhang;Zhi-shen Mo State Key Laboratory of Polymer Physics & Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences，Changchun 130022，China |
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| 基金项目： | This research was funded by the National Natural Science Foundation of China and subsidized by the Special Funds for Major State Basic Research Projects (G1999064800). |
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| 摘 要： | Analysis of isothermal and nonisothermal crystallization kinetics of nylon 66 was carried out using differentialscanning calorimetry (DSC). The commonly used Avrami equation and that modified by Jeziorny were used, respectively, tofit the primary stage of isothermal and nonisothermal crystallizations of nylon 66, In the isothermal crystallization process,mechanisms of spherulitic nucleation and growth were discussed. The lateral and folding surface free energies determinedfrom the Lauritzen-Hoffman treatment are σ= 9.77 erg/cm~2 and σ_e= 155.48 erg/cm~2, respectively; and the work of chainfolding is q = 33.14 kJ/mol. The nonisothermal crystallization kinetics of nylon 66 was analyzed by using the Mo methodcombined with the Avrami and Ozawa equations. The average Avrami exponent n was determined to be 3.45, Theactivation energies (ΔE) were determined to be -485.45 kJ/mol and -331.27 kJ/mol, respectively, for the isothermal andnonisothermal crystallization processes by the Arrhenius and the Kissinger methods.
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| 收稿时间： | 2001-02-20 |
MELTING CRYSTALLIZATION BEHAVIOR OF NYLON 66 |
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| Qing-xin Zhang,Zhi-shen Mo State Key Laboratory of Polymer Physics & Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences,Changchun ,China.MELTING CRYSTALLIZATION BEHAVIOR OF NYLON 66[J].Chinese Journal of Polymer Science,2001,0(3):237-246. |
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| Authors: | Qing-xin Zhang Zhi-shen Mo |
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| Institution: | State Key Laboratory of Polymer Physics & Chemistry Changchun Institute of Applied Chemistry Chinese Academy of Sciences; Changchun 130022; China |
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| Abstract: | Analysis of isothermal and nonisothermal crystallization kinetics of nylon 66 was carried out using differentialscanning calorimetry (DSC). The commonly used Avrami equation and that modified by Jeziorny were used, respectively, tofit the primary stage of isothermal and nonisothermal crystallizations of nylon 66, In the isothermal crystallization process,mechanisms of spherulitic nucleation and growth were discussed. The lateral and folding surface free energies determinedfrom the Lauritzen-Hoffman treatment are σ=9.77 erg/cm2 and σe=155.48 erg/cm2,respectively;and the work of chain folding is q=33.14 kJ/mol.The nonisothermal crystallization kinetics of nylon 66 was analyzed by using the Mo methof combined with the Avrami and Ozawa equations.The average Avrami exponent ? was determined to be 3.45.The activation energies(△E) were determined to be -485.45 kJ/mol -331.27 kJ/mol,respectively,for the isothermal and nonisothermal crystallization processes by the Arrhenius and the Kissinger methods. |
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| Keywords: | Nylon 66 Crystallization kinetics Activation energy |
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