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Rate characteristics for the reaction of carboxyl‐modified polyamide with potassium hydroxide
Author(s) -
Healy E. M.,
Ramsley A. O.,
Herz M. L.
Publication year - 1981
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.1981.070261010
Subject(s) - potassium hydroxide , polyamide , potassium , nylon 6 , chemistry , kinetics , titration , reaction rate constant , drop (telecommunication) , hydroxide , acrylic acid , sodium hydroxide , polymer chemistry , nuclear chemistry , inorganic chemistry , organic chemistry , polymer , monomer , telecommunications , physics , quantum mechanics , computer science
Nylon 66 fiber, carrying 2.0 meq/g of carboxyl groups from radiation grafting of acrylic acid, was found to display chemical kinetics strongly first order with respect to the potassium hydroxide. The apparent rate constant k' remains nearly unchanged as the initial bath pH is varied from 8.3 to 10.5. At this point, the value of k ' drops sharply, and continues to drop as the initial pH is increased. This discontinuity is attributed to a previously reported morphological transition indicated by a break in titration data at the corresponding equilibrium point of pH 9.2.