N-Acryloyl-o-aminobenzoic Acid and Styrene Copolymer-III. Application of Different Methods for Intrinsic Viscosity and Viscosity Constant Determination

Abstract

A high molecular weight copolymer of N-acryloyl-o-aminobenzoic acid (OAB) and styrene has been prepared by radical polymerization using benzoyl peroxide initiator in dioxane solvent. The copolymer has been fractionated by fractional precipitation and the fractions characterized by viscometry, vapour pressure osmometry and gel permeation chromatography. Mark-Houwink-Kuhn-Sakurada (MHKS) relationships are developed for three different solvents. Both the intrinsic viscosities and the viscosity constants of eight PO-PS fractions were obtained by the Huggins, Kraemer, Martin and Schulz-Blaschke methods in dimethyl formnamide, toluene and tetrahydrofuran solvents. It was concluded that the values obtained by these four methods are in close agreement.

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