Indian Journal of Advances in Chemical Science Volume: 7, Issue :4 , December 2019

ISSN No.: 2320-0898 (Print); 2320-0928 (Electronic)

DOI: 10.22607/IJACS.2019.704003

Research Article

Miscibility Studies of Poly(acrylonitrile)/Poly(vinyl chloride) Blends in Dimethylformamide by Viscometry

V. Balaji, P. Gopal Krishna, K. Chowdoji Rao*

ABSTRACT

Miscibility of poly(acrylonitrile) (PAN) with poly(vinyl chloride) (PVC) was investigated by dilute solution viscometry. Dilute solution viscosity measurements were made on ternary systems, polymer (1)/polymer (2) solvent dimethylformamide for different average molecular weights of PAN and PVC. The intrinsic viscosity and viscometric interaction parameters were determined for binary (solvent/polymer) systems as well as the ternary systems by classical Huggins equation. Degree of miscibility of these polymer systems was estimated on the basis of the three following criteria: (1) The sign of α, (2) the sign of ΔB, and (3) the sign of μ. Based on the sign convention involved in these criteria, miscibility was observed in all of the systems under study. The miscibility of all these systems in accordance with interaction between the unlike polymer chains rather than polymer–solvent interactions was investigated depending on molecular weight of polymer sample.
 

Key words: Viscosity, Hydrophilic polymers, Miscibility.

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