Dilute Solution Properties of Poly(methacrylonitrile-co-styrene) and Poly(acrylonitrile-co-styrene) |
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| Authors: | G Venkataramanareddy K S V Srinivasan M Santappa |
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| Institution: | 1. Department of Physical Chemistry , University of Madras , Madras, 25, India;2. Central Leather Research Institute , Adyar, Madras, 20, India |
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| Abstract: | Poly(methacrylonitrile-co-styrene) (PMANS) and Poly(acrylo-nitrile- co- styrene) (PANS) having 1:1 composition were prepared with free-radical initiators. The polymers were fractionated into fractions having narrow molecular weight distribution. The dilute solution properties of the fractionated copolymers were studied by light scattering, viscometry, and osmometry in solvents (methyl ethyl ketone, dimethylformamide, and acetone), n]-M w and(r2)w l/2?M w relationships have been established. The validity of the various graphical methods for the determination of Flory′s constant, K θ were observed. From the values of the steric factors it was noticed that the copolymer coil of PANS is stiffer than that of PMANS. |
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