Premium
Partially imidized, water‐soluble polymeric amides. I. Partially imidized polyacrylamide and polymethacrylamide
Author(s) -
Shepitka J. S.,
Case C. E.,
Donaruma L. G.,
Hatch M. J.,
Kilmer N. H.,
Khune G. D.,
Martin F. D.,
Ward J. S.,
Wilson K. V.
Publication year - 1983
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.1983.070281202
Subject(s) - polyacrylamide , hydrolysis , dissolution , polymer , stiffening , viscosity , brine , chemical engineering , polymer chemistry , materials science , chemistry , composite material , organic chemistry , engineering
Five to six million molecular weight polyacrylamide and polymethacrylamides of comparable post‐alkaline hydrolysis viscosities were imidized by dissolution and heating in 6 N HCl. After alkaline hydrolysis, the imidized polymers demonstrated significantly better retention of viscosity to 2% NaCl than did similar partially hydrolyzed polymers. Viscosities in 0.01% NaCl and resistance to shear were not markedly affected by this modification. It is assumed that this improved performance in brine is the result of chain stiffening due to intrachain imide rings.