| 多嵌段高分子的溶解性和分子形状的蒙特卡罗研究 |
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| 引用本文： | 李霆,杨小震.多嵌段高分子的溶解性和分子形状的蒙特卡罗研究[J].高分子学报,1999,15(5):581-587. |
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| 作者姓名： | 李霆 杨小震 |
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| 作者单位： | 中国科学院化学研究所高分子物理开放实验室,北京100080 |
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| 基金项目： | 国家自然科学基金,国家攀登计划自助项目 |
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| 摘 要： | 利用 Ｍｏｎｔｅ Ｃａｒｌｏ 方法模拟了两组分多嵌段高分子链在稀溶液中的行为，着重探讨了不同的嵌段长度对高分子性质的影响．研究中以自避的分子链为研究对象，分别考察了稀溶液中该分子链的溶解性、分子线团形状和嵌段单元的空间分布，与嵌段长度的关系．结果表明，在相同溶剂条件下，嵌段序列的长度对共聚高分子溶解性有较大影响，嵌段序列长度与溶解性能具有非单调的变化规律．该分子链在溶剂中的形状同样受到嵌段序列长度的影响．嵌段间的相互作用能的差别越大，则高分子的溶解性和形状对嵌段长度的依赖性就越显著
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| 关 键 词： | MonteCarlo 共聚高分子 多嵌段 非球因子 溶解性 |
STUDY ON THE SOLUBILITY AND SHAPE OF MULTIPLE-BLOCK COPOLYMER CHAINS BY MONTE-CARLO METHOD |
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| LI Ting,YANG Xiaozhen.STUDY ON THE SOLUBILITY AND SHAPE OF MULTIPLE-BLOCK COPOLYMER CHAINS BY MONTE-CARLO METHOD[J].Acta Polymerica Sinica,1999,15(5):581-587. |
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| Authors: | LI Ting YANG Xiaozhen |
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| Institution: | LI Ting, YANG Xiaozhen;
(Polymer Physics Laboratory,Institute of Chemistry,Chinese Academy of Sciences, Beijing |
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| Abstract: | The behavior of multiple block copolymer chains with two kinds of chemicalcomponentsin dilute solutions has been studied by Monte Carlo method . Addressed here isan exploration that various block sequencelengths affectthe nature ofthecopolymers. In thissimulation ,the chains are generated in the way of self avoiding walking . The solubility ,theshape of chain topology and the topological distribution of chemically different blocks of thecopolymers were respectively examined . Obtained results show that in the same solvent thelength of the block sequence influences remarkably the solubility of the copolymers. Thesolubility does not change monotonously with the block length . The shape of chain topolgyexhibited the same behavior. The difference of the interaction between the two differentblocksresultsin the dependence of the solubility and the chain shape on the block sequencelength . |
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| Keywords: | Monte Carlo |
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