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Molecular weight characterization of poly(acrylamide‐ co ‐sodium acrylate). I. Viscometry
Author(s) -
Wu X. Y.,
Hunkeler D.,
Hamielec A. E.,
Pelton R. H.,
Woods D. R.
Publication year - 1991
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/app.1991.070420736
Subject(s) - viscometer , acrylamide , copolymer , polyacrylamide , acrylate , polymer chemistry , intrinsic viscosity , molecular mass , materials science , hydrolysis , butyl acrylate , viscosity , polymer , chemistry , organic chemistry , composite material , enzyme
Mark–Houwink constants for polyacrylamide and poly(acrylamide‐ co ‐sodium acrylate) in 0.2M Na 2 SO 4 were measured using eight fractionated samples of polyacrylamide and 26 hydrolyzed polyacrylamide samples. The dependence of K and a on the copolymer compositions was found for the range of acrylate content 6 ∼ 40 mol %. A relationship between intrinsic viscosity and acrylate content in the form of square root law was found. Molecular weights of copolymer samples with various compositions were estimated using viscometry with Mark–Houwink equations established in this work. The molecular weights of narrow MWD copolymer samples could be measured with an error of ±5%, whereas those of broad MWD copolymer samples with an error of ±8%.