| PBA/尼龙6/H_2SO_4体系液晶相转变动力学研究 |
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| 引用本文： | 林嘉平,吴和融,李世瑨.PBA/尼龙6/H_2SO_4体系液晶相转变动力学研究[J].高分子材料科学与工程,1993(3). |
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| 作者姓名： | 林嘉平 吴和融 李世瑨 |
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| 作者单位： | 华东化工学院材料科学研究所，华东化工学院材料科学研究所，华东化工学院材料科学研究所 上海 200237，上海 200237，上海 200237 |
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| 摘 要： | 本文用PLM及DLI法研究了聚对苯甲酰胺及聚对苯甲酰胺/尼龙6的硫酸溶液由液晶态转变为非液晶态过程的相转变动力学;以及由非液晶态转变为液晶态的液晶化动力学。在由液晶态转变为非液晶态的过程中,PBA体系的转变由三个阶段组成,而PBA/尼龙6体系仅一个阶段,每个阶段的相变级数与活亿能,都可由动力学方程求得。在相同的相转变温度下,PBA体系的转变速率要比PBA/尼龙6共混体系快。研究结果还表明,PBA体系以及共混体系的液晶化过程数据用Avrami公式处理,线性关系很好。PBA体系的液晶化过程与PBA/尼龙6体系也不同,PBA体系也有三个阶段,而共混体系仅有一个。不同的液晶成核条件及液晶化温度都可使n、k值有规律地变化。
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| 关 键 词： | 聚对苯甲酰胺 尼龙6 高分子液晶 相转变 溶致型液晶 液晶化 液晶核 |
KINETIC STUDIES ON LIQUID CRYSTALLINE PHASE TRANSITIONS IN PBA/NYLON 6/H_2SO_4 SYSTEMS |
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| Lin Jiaping,Wu Herong and Li Shijin.KINETIC STUDIES ON LIQUID CRYSTALLINE PHASE TRANSITIONS IN PBA/NYLON 6/H_2SO_4 SYSTEMS[J].Polymer Materials Science & Engineering,1993(3). |
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| Authors: | Lin Jiaping Wu Herong and Li Shijin |
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| Abstract: | Liquid crystalline phase transitions in PBA/nylon 6/H2SO4 systems were studied by Polarized Light Microscope (PLM) and Depolarized Light Intensity (DLI) technique. In the transition from anisotropic state to isotropic state, for PBA/H2SO4 system, the process is composed of three stages and for PBS/nylon 6/H2SO4 system just one. The order of transition(m) and the activation energy(E) of each stage can be evaluated from kinetic equation. The liquid crystallization in both PBA/H2SO4 and PBA/nylon 6/H2SO4 system was also studied. The results based on DLI measurements have been analysed using Avrami equation. It is found that the n and k, according to Avrami equation, could change regularly under different liquid crystllization nucleation and temperature conditions. |
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| Keywords: | poly (p-benzamide) nylon 6 polymer liquid crystal phase transition liquid crystallization liquid crvstal nucleation |
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