两类聚合物溶液的相变分析

讨论了两类聚合物溶液的相变,一类是单体相-溶胶相-凝胶相之间的相变;另一类是溶液中溶胶-凝胶之间的相变.结果表明,聚合物溶液体系相变的阶和相变点依赖于每个子系(单体或溶剂分子)的态的简并度以及子系间的有效相互作用;态的简并度的对称性和均匀性对相变的阶和临界点有明显的影响.

THE PHASE TRANSITION ANALYSIS FOR TWO TYPES OF POLYMER-SOLUTION

Owing to a lot of characteristic parameters and controlled parameters of configuration in polymer, the transition analysis of polymer has become very complex. Therefore, the modelling-method in transition-analysis of polymer is important.The major aim of this paper is to analyze the transition for two types of polymer system: the transition amony monomer phase-sol phase-gel phase; the transition of sol phase-gel phase in solution. It is shown in this paper that the order and critical point of phase transition in the system of polymer-solution depends on the degeneracies of the states of each subsystem ( monomer or solvent molecules) and on the effective interaction between subsystem. The symmetry and uniformity of the degeneracy of the states have a clear influence on the order and critical point of phase transition.