Abstract
The solubility behaviors of polymethyacrylonitrile (PMAN), poly(methacrylic acid) (PMAA), and its random copolymer methacrylonitrile (MAN)/methacrylic acid (MAA) in various solvents were investigated. The results were used in a computer program to obtain a 3‐dimensional representation of the polymer solubility region in the Hansen space. Thus, the values of dispersion (δ d,p ), polar (δ p,p ) and hydrogen bonding (δ h,p ) components of the total solubility parameter (δ t,p ) were obtained. Comparisons between the experimental results and the estimated values are discussed. Also, prediction for solubility parameter values for MAN/MAA copolymer via their homopolymers, PMAN, and PMAA has been evaluated. Copyright © 1991 John Wiley & Sons, Inc.