| O-(4-喹唑啉)羟肟酸硫代酯(酰胺)类化合物的合成及生物活性 |
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| 引用本文： | 李海鹏,祝方明.O-(4-喹唑啉)羟肟酸硫代酯(酰胺)类化合物的合成及生物活性[J].应用化学,1999,16(2):27-30. |
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| 作者姓名： | 李海鹏 祝方明 |
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| 作者单位： | 华南理工大学材料学院高分子系，中山大学高分子研究所 |
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| 摘 要： | 用差示扫描量热分析研究了间规聚苯乙烯（ｓＰＳ）的非等温结晶及其动力学，并分别用Ｏｚａｗａ和Ｊｅｚｉｏｒｎｙ两种方法来处理ｓＰＳ的非等温结晶数据．结果表明，在２５～４０℃／ｍｉｎ的冷却速率范围内，ｓＰＳ的半结晶时间随冷却速率增大而呈指数式下降，ｓＰＳ非等温结晶过程遵循Ｏｚａｗａ动力学方程，但不符合Ｊｅｚｉｏｒｎｙ方法中的Ａｖｒａｍｉ动力学方程．所得到的ｓＰＳ非等温结晶Ａｖｒａｍｉ指数ｎ在３６～４１之间，高于等温结晶时的ｎ值
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| 关 键 词： | 间规聚苯乙烯，非等温结晶，动力学，DSC |
Kinetic Study of the Nonisothermal Crystallization of Syndiotactic Polystyrene |
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| Li Haipeng,Shen Jiarui.Kinetic Study of the Nonisothermal Crystallization of Syndiotactic Polystyrene[J].Chinese Journal of Applied Chemistry,1999,16(2):27-30. |
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| Authors: | Li Haipeng Shen Jiarui |
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| Institution: | Li Haipeng*,Shen Jiarui |
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| Abstract: | The nonisothermal crystallization and its kinetics of syndiotactic polystyrene(sPS) have been studied by DSC technique. The methods of Ozawa and Jeziorny for nonisothermal crystallization are applied to analyse the DSC data. It is found that the halftime of sPS crystallization decreases as an exponential function of the cooling rate ranged from 2.5 to 40 /min. The nonisothermal crystallization of sPS follows the Ozawa equation, but fails to agree with the Avrami equation in the Jeziorny method. The values of the Avrami exponent determined by the Ozawa equation are between 3641, higher than those reported values obtained by means of isothermal methods. |
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| Keywords: | syndiotactic polystyrene nonisothermal crystallization kinetics DSC |
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