Dilute solution properties of methyl methacrylate—acrylonitrile copolymer (MA2)

Kashyap, AK and Kalpagam, V (1979) Dilute solution properties of methyl methacrylate—acrylonitrile copolymer (MA2). In: Journal of Polymer Science Part A: Polymer Chemistry, 17 (1). pp. 225-236.

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Abstract

This article deals with studies of the dilute solution properties of methyl methacrylate-acrylonitrile (MMA-AN) copolymer of 0.415 mole fraction (mf) of acrylonitrile composition. Mark—Houwink parameters for this copolymer have been evaluated in acetonitrile (MeCN), 2-butanone (MEK), dimethyl formamide (DMF), and γ-butyrolactone (γ-BL). The Mark-Houwink exponent a in all four solvents at all temperatures is larger than the corresponding values of the parent homopolymers. The solvent power is in the order of DMF < γ–BL < MEK < MeCN; [η] decreases with an increase in temperature, which is behavior characteristic of polymers in good solvent. The unperturbed dimensions (K0) values, obtained by the Stockmayer–Fixman method, are lower than those for the parent homopolymers and depend on solvent as well as temperature. The solute—solvent interaction parameter X1 values are close to 0.5; X1 is independent of temperature. The excess interaction parameter XABvalues are negative. The results for this copolymer system in regard to low second virial coefficient A2, large X1, and high a values suggest that the large extension of these copolymer chains is due to the unusual short-range interactions.

Item Type:	Journal Article
Publication:	Journal of Polymer Science Part A: Polymer Chemistry
Publisher:	John Wiley and Sons
Additional Information:	Copyright of this article belongs to John Wiley and Sons.
Department/Centre:	Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited:	16 Dec 2010 06:28
Last Modified:	16 Dec 2010 06:28
URI:	http://eprints.iisc.ac.in/id/eprint/34531

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