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Effect of sorbed water on dielectric and mechanical properties of polyion complex

✍ Scribed by Okimichi Yano; Yasaku Wada

Publisher
John Wiley and Sons
Year
1980
Tongue
English
Weight
532 KB
Volume
25
Category
Article
ISSN
0021-8995

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✦ Synopsis

Abstract

Effect of sorbed water on dielectric and mechanical properties is studied for three kinds of polyion complex (PIC) membranes formed from equal moles of polyanion [poly(sodium 4‐vinylbenze‐sulfonate)] and three polycations of different structural isomerisms [poly(4‐vinylphenethyltriethylammonium bromide), poly(3‐vinylphenethyltriethylammonium bromide), and random copolymer of these monomers]. Sorption isotherms and swelling characteristics indicate that PIC of parapolycation includes more water microphases than PIC of meta‐polycatio. Complex dielectric constants of three PICs with varied water contents are measured at frequencies from 10 Hz to 100 kHz and the relaxation is analyzed in terms of the heterogeneous structure. Stress–elongation relationships of PICs equilibrated with water and aqueous NaBr indicate that yield and break stresses are higher for PIC of meta‐polycation than that of para‐polycation and decrease with increasing NaBr concentration above 0.1__M__.

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