| 高聚物玻璃化转变温度和分子参数的关系 Ⅰ.高聚物链柔性与Tg的关系 |
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| 引用本文： | 卢新亚,姜炳政. 高聚物玻璃化转变温度和分子参数的关系 Ⅰ.高聚物链柔性与Tg的关系[J]. 高分子学报, 1990, 0(4): 434-440 |
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| 作者姓名： | 卢新亚 姜炳政 |
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| 作者单位： | 中国科学院长春应用化学研究所高分子物理开放实验室 |
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| 摘 要： | 本文采用晶格模型,以动力学链段长度作为统计单元大小,推导了高聚物玻璃化温度T_8和链静态刚性因子σ2(T8),链动态刚性因子β(T8)以及聚合度DP等分子参数之间的关系。具体讨论了链柔性对T8的影响。理论预测和几十种聚合物的实验数据能较好吻合,分析结果表明T8值基本上取决于高聚物链σ(T8)大小。
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| 关 键 词： | 高聚物 玻璃化温度 链刚度因子 |
| 收稿时间： | 1989-01-20 |
RELATIONSHIP BETWEEN GLASS TRANSITION TEMPERATURE (Tg) AND MOLECULAR PARAMETERS OF POLYMERS I.Effect of Chain flexibility on Tg |
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| LU Xin-ya,JIANG Bing-zheng. RELATIONSHIP BETWEEN GLASS TRANSITION TEMPERATURE (Tg) AND MOLECULAR PARAMETERS OF POLYMERS I.Effect of Chain flexibility on Tg[J]. Acta Polymerica Sinica, 1990, 0(4): 434-440 |
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| Authors: | LU Xin-ya JIANG Bing-zheng |
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| Affiliation: | Laboratory of Polymer Physics; Changchun Institute of Applied Chemistry; Academia Sinica; Changchun |
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| Abstract: | The theoretical relationship, which correlates the glass transition temperature (Tg) with the other molecular parameters, has been proposed by taking the dynamic segment as the basic statistical unit. The dependency of Tg on the stiffness factor o2(Tg) for isolated chain at Tg and dynamic stiffness parameter (B= -d(lno2)/dT) has been discussed in detail. The theoretical prediction is compared with the experimental data for many linear polymers and the good agreement is obtained. It has been shown that Tg is essentially governed by the chain stiffness factor at Tg. |
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