| 离聚体的微观链运动与玻璃化转变温度 |
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| 引用本文： | 杨延武,王洪祚.离聚体的微观链运动与玻璃化转变温度[J].高分子材料科学与工程,1992,8(3):1-5. |
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| 作者姓名： | 杨延武 王洪祚 |
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| 作者单位： | 南开大学高分子研究所，中国科学院武汉物理研究所渡谱与原子分子物理国家重点实验室，中国科学院武汉物理研究所渡谱与原子分子物理国家重点实验室，武汉大学化学系 武汉 430071，武汉 430071，武汉 430072 |
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| 摘 要： | 本文用动态力学谱和~(13)C NMR方法分别测定了丙烯酸-1,1,5-三氢全氟戊酯与丙烯酸共聚物为基础的离聚体的玻璃化转变温度T_s和~(13)C自旋-自旋驰豫时间t_2,用描述高分子主链链段运动的VJGM模型计算了所测样品的链段运动活性。结果表明,离聚体样品的玻璃化转变温度与离聚体大分子链运动活性密切相关,大分子的微观链段运动越困难,玻璃化转变温度越高。
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| 关 键 词： | 丙烯酸 玻璃化 转变温度 离聚体 |
RELATIONSHIPS BETWEEN GLASS TRANSITION TEMPERATURE AND CHAIN DYNAMICS FOR FLUORINE-CONTAINING IONOMERS |
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| Yang Yanwu,Wang Dehun and Qian Baogong.RELATIONSHIPS BETWEEN GLASS TRANSITION TEMPERATURE AND CHAIN DYNAMICS FOR FLUORINE-CONTAINING IONOMERS[J].Polymer Materials Science & Engineering,1992,8(3):1-5. |
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| Authors: | Yang Yanwu Wang Dehun and Qian Baogong |
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| Abstract: | The glass transition temperature of ionomers based on co'polymers of 2,2,3,3,4,4,5,5-octafluoropentyl ester acrylate and acrylic acid are measured by means of dynamic mechanics. The carbon-13 spin-spin relaxation times of ionomers are measured by using nuclear magnetic resonance techniques. The parameters of polymer chain motions for ionomers with same functional group contents, different ionization degree and different metal ions are calculated by using VJGM motional model. The results show that the glass transition temperature of ionomers are related to the motional activities of polymer chain segments. The more difficult the motions of polymer chain segment are, the greater the glass transition temperature are. |
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| Keywords: | glass transition temperature ionomer chain dynamics spin-spin relaxation times |
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