Statistical-Mechanical Study of Phase Formation in Thermoreversible Gels

热可逆凝胶相形成的统计力学研究

基本信息

批准号：
05640450
负责人：
TANAKA Fumihiko
金额：
$ 1.47万
依托单位：
Tokyo University of Agriculture and Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1993
资助国家：
日本
起止时间：
1993 至 1994
项目状态：
已结题

项目摘要

We developed a new theory ("Solution Theory of Associating Polymers") to derive phase diagrams of thermoreversible gels. This theory is a combination of the lattice-theoretical polymer solution theory developed by Flory and Huggins, and the classical theory of gelation (tree statistics) established by Flory and Stockmayr. It describes chemical equilibrium among polymers.(1) By this new theory, we derived phase diagrams of complex fluids including homopolymer gels, hydrated gels, interpenetrating gels, gels accompanied by polymer comformation change, etc. We showed new multicritical phenomena appear as a result of the competion among sol/gel transition, microphase separation and macrophase separation.(2) On the basis of these results, we are now developing on a work station a computer system for the prediction of complex phase diagrams from molecular design of constituent polymers. This system will serve as a simulation system to help material developments.(3) We also developed a theory of visco-elasticity of thermoreversible gels. This is called "Transient Network Theory", and provides a good starting point to study, for examle, movement of biiological cells by repeated sol/gel transition and viscosity-controlling polymers called "thickner". Some reserch groups in Eulope and U.S.A.are producing experimental data to compare with our theory.

我们开发了一种新的理论（“关联聚合物的解决方案理论”），以得出热可逆凝胶的相图。该理论是Flory和Huggins开发的晶格理论聚合物解决方案理论的结合，以及Flory和Stockmayr建立的胶凝理论（树统计）。它描述了聚合物之间的化学平衡。（1）通过这一新理论，我们得出了复杂的液体的相图，包括均聚物凝胶，水合凝胶，水合凝胶，互穿凝胶，凝胶伴随着聚合物的合并变化等。我们显示了新的多个临床现象，是在单独的/凝胶分离的结果中，以这些多种智力分离的结果，这些结果是两种分离的结果，即两种分离的结果（2）过渡酶（2）。现在，我们正在工作站开发一个计算机系统，以预测组成聚合物分子设计的复杂相图。该系统将作为一个模拟系统，以帮助物质发展。（3）我们还开发了一种可爱凝胶的粘弹性理论。这称为“瞬态网络理论”，并为研究提供了一个很好的起点，用于审查，通过重复的溶胶/凝胶过渡和粘度控制的聚合物（称为“厚者”）的生物细胞运动。一些在Eulope和美国的Reserch组。正在生成实验数据以与我们的理论进行比较。