z-logo
Premium
High molecular weight hydrolyzed polyacrylamides. III. Effect of temperature on chemical stability
Author(s) -
Muller G.,
Fenyo J. C.,
Selegny E.
Publication year - 1980
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.1980.070250409
Subject(s) - hydrolysis , polyacrylamide , chemistry , degradation (telecommunications) , intrinsic viscosity , viscosity , molar mass distribution , potentiometric titration , polymer , polymer chemistry , chemical engineering , chromatography , organic chemistry , materials science , ion , composite material , telecommunications , computer science , engineering
The effect of temperature (100°C) and heating time (up to 384 hr) on the physicochemical properties of high molecular weight ( M̄ p ≅ 4 × 10 6 ) partly hydrolyzed (τ ≅ 31%) polyacrylamide (HPAM‐25) solutions with initial pH values near 4 and 7, respectively, is reported. Potentiometric and spectroscopy data indicate that upon heating the solutions for 16 days the extent of hydrolysis is increased up to around 90%. The viscosity behavior, especially in the presence of bivalent salt (CaCl 2 ), can be explained by taking such an increase in hydrolysis into consideration. From light scattering data, it is shown that the conformational changes are not correlated with molecular weight degradation.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here