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Solubility parameters of poly(4‐substituted α‐acetoxystyrenes) and alternating copolymers of vinylidene cyanide with substituted styrenes
Author(s) -
Belfkira Ahmed,
Montheard JeanPierre
Publication year - 1994
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1994.070511102
Subject(s) - tacticity , copolymer , solubility , cyanide , polymer chemistry , polymer , hildebrand solubility parameter , materials science , microstructure , thermodynamics , polymer science , chemistry , polymerization , organic chemistry , composite material , physics
The δ solubility parameters of three families of polymers have been determined by two calculation methods suggested by Small and Hoy. Hansen's model has also been used to assess δ and its components δ d 0 , δ p 0 , and δ h 0 , so as to obtain more information on the intensity of the forces between the chain segments. Knowing the microstructure, the tacticity, and the thermal behavior of the copolymers has made it possible to explain both the different values of δ and the progression of solubility areas. Using Teas' method has made it possible to visualize on the same map the influence of the forces of interaction. This representation shows that the presence of the vinylidene cyanide unit in styrenic chains implies an increase of δ p and a decrease of δ d , whereas δ h remains roughly constant for the corresponding homopolymer. © 1994 John Wiley & Sons, Inc.