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Studies of the Polymerization of Vinyl Acetate in the Aqueous Solutions of Partially Acetylated Polyvinyl Alcohol. II. On the Change of Huggins' Constant k ′ with the Variation of the Composition of the Mixed Solvent
Author(s) -
Lin ChenChong
Publication year - 1960
Publication title -
journal of the chinese chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.329
H-Index - 45
eISSN - 2192-6549
pISSN - 0009-4536
DOI - 10.1002/jccs.196000007
Subject(s) - chemistry , solvent , methanol , aqueous solution , polyvinyl alcohol , viscosity , polymer , polymer chemistry , vinyl acetate , vinyl alcohol , polymerization , organic chemistry , thermodynamics , copolymer , physics
The change of Huggins' constant k ′ of the graft polymer solution brought about by varying the composition of the solvent was studied. The graft polymer solution studied was prepared according to the method described in the author's previous paper, (1) and k ′ was obtained from viscosity measurements of the solvent with varying methanol contents. The following results were obtained: (1) The Huggings' constant was found to change with the variation in the methanol content of solvent. (2) The minimum value for k ′ was attained when the solvent contained 75% methanol. (3) The first interaction coefficients a 2 were determined and the critical point was also observed under the same conditions.