Rheological properties of concentrated polyacrylonitrile co-polymer and lignin blend solution

Porkodi, P and Abhilash, JK and Shukla, HK and Rawat, J (2020) Rheological properties of concentrated polyacrylonitrile co-polymer and lignin blend solution. Polymer Bulletin, 77 (8). pp. 3937-3951. ISSN 01700839

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Abstract

Polyacrylonitrile copolymers with different molecular weights (Mws) are synthe-sised by aqueous free-radical redox polymerisation technique. Polyacrylonitrile (PAN) and lignin-blended solutions are prepared in dimethyl sulphoxide solvent by varying the polyacrylonitrile/lignin content. The effect of lignin addition to PAN copolymer having different weight-average Mws on the rheological properties is explored. Rheological measurements indicate that the solution viscosity reduces with the increase in the lignin content. The Cole–Cole plot or Han plot and Cas-son plot are used to characterise the solution homogeneity. The slope value of the plot suggests that the molecular-level homogeneity of the solution is not affected much by the addition of lignin. Thermal-induced gelation of concentrated solution has been rheologically investigated to avoid overheating of solution during the dis-solution, storage and transportation for further wet spinning process.

Item Type: Article
Uncontrolled Keywords: Polyacrylonitrile, Viscosity, Rheological, Gelation, Lignin
Subjects: CHEMISTRY AND MATERIALS > Chemistry and Materials (General)
Depositing User: Smt Bhagya Rekha KA
Date Deposited: 23 Nov 2021 11:36
Last Modified: 23 Nov 2021 11:36
URI: http://nal-ir.nal.res.in/id/eprint/13420

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