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Viscosity‐temperature relationship of dilute solution of poly(vinyl chloride) in cyclohexanone and in its blends with xylene
Author(s) -
Gupta Kartick,
Yaseen M.
Publication year - 1997
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19970926)65:13<2749::aid-app18>3.0.co;2-s
Subject(s) - cyclohexanone , vinyl chloride , polyvinyl chloride , thermodynamics , solvent , viscosity , xylene , arrhenius equation , activation energy , materials science , polymer , polymer chemistry , intrinsic viscosity , chemistry , organic chemistry , toluene , copolymer , catalysis , physics
Absolute viscosities of dilute solutions of poly(vinyl chloride) (PVC) in cyclohexanone and in its blends with xylene were determined at temperatures ranging from 5 to 50°C and in THF at 5–30°C. The simple Arrhenius reaction kinetics equation, used by Anrade to analyze the viscosity data of liquids and later by Moore for dilute polymer solutions, was used to estimate the thermodynamic parameters for the flow of PVC solutions and the quality of solvents. This relationship was also used to calculate thermodynamic parameters for PVC in binary solvent systems. The data of the activation energy of the viscous flow and preexponential factor were further analyzed by using the empirical relationships suggested by Moore for flexible polymer chains. The parameters obtained from these relationships are used to estimate and compare the solvency power of solvents and solvent blends. A blend of 1 : 1 cyclohexanone and xylene is found to have better dissolution characteristics for PVC than have cyclohexanone and other blends. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65: 2749–2760, 1997