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Phase equilibria of quasi‐binary systems consisting of multicomponent polymers 1 and 2. IV: Poly(ethylene oxide)/poly(propylene oxide) systems
Author(s) -
Shirataki Hironobu,
Kamide Kenji
Publication year - 1994
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.1994.210340110
Subject(s) - polymer , ethylene oxide , propylene oxide , polymer chemistry , materials science , oxide , phase (matter) , thermodynamics , binary number , binary system , chemistry , physics , organic chemistry , composite material , copolymer , mathematics , arithmetic , metallurgy
To confirm the reliability of the theory of phase equibria of multicomponent polymer 1/multicomponent polymer 2 systems (i.e. quasi‐binary systems) and the method of computer experiment based on this theory ( Brit. Polym. J ., 23 (1990)285; 23 (1990)299; Polym. Int ., 29 (1992)219), could point curves (CPC), two‐phase volume ratios ( R ) and critical solution points (CSP) have been determined experimentally for the quasi‐binary mixtures of poly(ethylene oxide) ( M¯ w = 647, M¯ w / M¯ n = 1.15; M¯ w and M¯ n , the weight‐average and numberaverage molecular weights, respectively) and poly(propylene oxide) ( M¯ w = 2028, M¯ w / M¯ n = 1.08; and M w = 2987, M w / M n = 1.13). The hydroxyl end groups of both polymers were methoxylated in advance by the Cooper & Booth method ( Polymer , 18 (1977)164). The thermodynamic interaction parameter between both polymers, χ 12 , and the concentration dependence parameters for the above quasi‐binary systems were determined by the method proposed in a previous paper ( Brit. Polym. J ., 23 (1990)299). CPC, R and CSP values calculated on the basis of the theory are in good agreement with the values determined experimentally.