| 聚羟基丁酸酯的等温与非等温结晶动力学 |
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| 引用本文： | 李海东,管明章,程凤梅,李婷婷.聚羟基丁酸酯的等温与非等温结晶动力学[J].高分子材料科学与工程,2012(8):60-63. |
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| 作者姓名： | 李海东 管明章 程凤梅 李婷婷 |
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| 作者单位： | 长春工业大学化学工程学院 |
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| 基金项目： | 国家自然科学基金资助项目(50621302) |
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| 摘 要： | 用差示扫描量热法(DSC)研究了聚羟基丁酸酯(PHB)的等温与非等温结晶动力学。采用Avrami方程分析了等温结晶动力学,Avrami指数n≈2,表明PHB以异相成核的二维平面晶体方式生长,等温结晶活化能为82.4 kJ/min。采用Jeziorny法和莫志深法分析了PHB的非等温结晶动力学,Avrami指数n≈3,表明PHB非等温结晶过程以异相成核的三维球晶方式生长。
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| 关 键 词： | 聚羟基丁酸酯 等温结晶 非等温结晶 结晶动力学 |
Isothermal and Non-Isothermal Crystallization Kinetics of Poly(3-Hydroxybutyrate) |
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| Haidong Li,Mingzhang Guan,Fengmei Cheng,Tingting Li.Isothermal and Non-Isothermal Crystallization Kinetics of Poly(3-Hydroxybutyrate)[J].Polymer Materials Science & Engineering,2012(8):60-63. |
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| Authors: | Haidong Li Mingzhang Guan Fengmei Cheng Tingting Li |
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| Affiliation: | (College of Chemical Engineering,Changchun University of Technology,Changchun 130012,China) |
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| Abstract: | The crystallization kinetics during the isothermal crystalization and nonisothermal crystallization of poly(3-hydroxybutyrate)(PHB) were investigated by means of differential scanning calorimetry(DSC).The Avrami analysis was performed to obtain the kinetics parameters.The value of Avrami index n,is about D,indicating a two-dimensional(2D) growth and heterogeneous nucleation in the process of isothermal crystallization.The activation energy for isothermal crystallization is 82.4 kJ/min.respectively.In the process of nonisothermal crystallization of PHB,the value of Avrami index n,is about 3,which demonstrates a three-dimensional spherulitic growth on heterogeneous nucleation. |
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| Keywords: | poly(3-hydroxybutyrate) isothermal nonisothermal crystallization kinetics |
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