| 聚乙烯链构象熵的研究 |
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| 引用本文： | 王治虎,罗孟波.聚乙烯链构象熵的研究[J].功能高分子学报,1997,10(2):241-244. |
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| 作者姓名： | 王治虎 罗孟波 |
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| 作者单位： | [1]杭州广播电视大学 [2]杭州大学物理系 |
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| 摘 要： | 采用旋转异构态模型，考虑近程二级相互作用和远程自回避相互作用，在金钢石格点上模拟聚乙烯链，用完全计算法研究了它的构象熵。我们得到聚乙烯链的我象熵现温度及链长的函数关系式。发现在约２００Ｋ温度以上，聚乙烯链的构象的熵随温度沽小不明显，在约２００Ｋ以下，构象熵随温度迅速减小，约在４２Ｋ的构象熵为零。我们还以现，该链的构象熵近似地与链长成正比。
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| 关 键 词： | 聚乙烯链 构象熵 完全计算法 旋转异构态模型 |
Study on the Conformational Entropy of the Polyethylene Chain |
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| Wang Zhihu,Luo Mengbo,Xu Jianmin.Study on the Conformational Entropy of the Polyethylene Chain[J].Journal of Functional Polymers,1997,10(2):241-244. |
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| Authors: | Wang Zhihu Luo Mengbo Xu Jianmin |
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| Institution: | Wang Zhihu 1 Luo Mengbo 2 Xu Jianmin 2 |
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| Abstract: | The conformational entropy of the polyethylene chain is calculated with the rotational isomeric state model and exact enumeration method. The polyethylene chain which submitted to short-range and long-range interaction are generated in diamond lattice. The function relation of the conformational entropy versus temperature and chain length is obtained. We find: (1) The conformational entropy decreases slowly above about 200K and decreases quickly below about 200K with a decrease in temperature; (2) The conformational entropy is zero about 42K; (3) The conformational entropy of the chain is proportional to the chain length approximately. |
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| Keywords: | Polyethylene chain Conformational entropy Exact enumeration method |
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