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高分子凝胶体积相变中的氢键作用
引用本文:赵新军,蒋中英.高分子凝胶体积相变中的氢键作用[J].原子与分子物理学报,2015,32(2):313-317.
作者姓名:赵新军  蒋中英
作者单位:伊犁师范学院新疆凝聚态相变与微结构实验室,伊犁师范学院电子与信息工程学院
摘    要:我们把关联模型(association models)推广应用到高分子凝胶体系,研究高分子与溶剂分子间的氢键和溶剂分子与溶剂分子间的氢键在高分子凝胶体积相变中的作用.首先通过分析凝胶体积分数与温度的关系发现,由于两种氢键作用,随着温度变化高分子凝胶出现连续、不连续体积相变,结果表明在体积相变过程中两种氢键都起着重要作用.其次,对不同氢键分数条件下的旋节线的研究发现,对于高分子凝胶体积相变中出现的UCST和LCST(上临界共溶温度和下临界共溶温度)现象也是由于高分子与溶剂分子间氢键和溶剂分子与溶剂分子间氢键共同作用的结果.

关 键 词:高分子凝胶  体积相变  氢键

The role of hydrogen bonding in the volume phase transitions of polymer gels
ZHAO Xin-Jun;JIANG Zhong-Ying.The role of hydrogen bonding in the volume phase transitions of polymer gels[J].Journal of Atomic and Molecular Physics,2015,32(2):313-317.
Authors:ZHAO Xin-Jun;JIANG Zhong-Ying
Institution:ZHAO Xin-Jun;JIANG Zhong-Ying;Xinjiang Laboratory of Phase Transition and Microstractures of Condensed Matter Physics,Yi Li Normal University;School of Electronics and Information,Yi Li Normal University;
Abstract:We presented a theory to study the volume phase transitions in hydrogen bonded polymer gels. Our theory model include the consideration of polymer-solvent and solvent-solvent molecules hydrogen bonds. On basis of our theory approach, we investigated the polymer gels volume fraction as a function of temperature and spinodal curves. It is clearly indicate, because of two types of hydrogen bonds, polymer gels present continuous and discontinuous volume phase transitions. The calculated spinodal curves reveal, also because of both polymer-solvent and solvent-solvent molecules hydrogen bonds, the presence of UCST and LCST (upper and lower critical solution temperature).
Keywords:Polymer gels    Volume phase transition    Hydrogen bonding
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