Studies of spinodal decomposition in a ternary polymer-solvent-nonsolvent system
Studies of spinodal decomposition in a ternary polymer-solvent-nonsolvent system
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DOI：
10.1002/pen.11009
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发表时间：
2002-05-01
影响因子：
3.2
通讯作者：
Caneba, GT
中科院分区：
文献类型：
--
作者：
Saxena, R;Caneba, GT
在调幅节点分解的建模和计算机模拟方面，许多工作都是针对二元体系进行的。本文试图对聚合物-溶剂-非溶剂三元体系中的调幅分解进行分析，其中溶剂是用于生产聚合物的单体，非溶剂是主要组分。各种实验方法被用来确定变节分解的Cahn-Hilliard方程的三元版本的参数值，例如浊点实验、三元体系中的时间分辨光散射以及在变节分解的早期阶段形成的聚合物膜的形态发展。这些实验方法和计算机模拟工作的结合表明，在表征感兴趣的三元聚合物体系中的调幅分解时所做的假设是有效的。
Much of the work in modeling and computer simulation of spinodal decomposition has been done for binary systems. This work attempts to carry out the analysis of spinodal decomposition in ternary polymer-solvent-nonsolvent systems, where the solvent is the monomer used to produce the polymer and the nonsolvent is the major component. Various experimental methods are used to determine values of the parameters of the ternary version of the Cahn-Hilliard equation of spinodal decomposition, such as cloudpoint experiments, time-resolved light scattering in the ternary system, and morphological development of polymer membranes formed during the early stages spinodal decomposition. The combination of these experimental methods and computer simulation work shows the validity of the assumptions made in characterizing spinodal decomposition in ternary polymer systems of interest.