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Preparation and solid‐state polyamidation of hexamethylenediammonium adipate: The effect of sodium 5‐sulfoisophthalic acid
Author(s) -
Vouyiouka S. N.,
Koumantarakis G. E.,
Papaspyrides C. D.
Publication year - 2007
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.25762
Subject(s) - adipate , hexamethylenediamine , polyamide , thermogravimetric analysis , salt (chemistry) , polymer chemistry , polymerization , materials science , solid state , chemistry , chemical engineering , precipitation , nuclear chemistry , polymer , organic chemistry , physics , meteorology , engineering
The effect of sodium 5‐sulfoisophthalic acid (NaSIPA) on the solid‐state polymerization of hexamethylenediammonium adipate was studied. In particular, different polyamide salt grades, such as a model salt of hexamethylenediamine and NaSIPA and a polyamide 6,6 salt containing NaSIPA, were prepared through alternative procedures based on the solution–precipitation technique. Furthermore, selected salt grades were solid‐state‐polymerized in a thermogravimetric analysis chamber under static and flowing nitrogen. Critical reaction parameters, such as the reaction temperature, surrounding gas, and presence of NaSIPA, were investigated to determine the rate‐controlling mechanism of the process. More specifically, NaSIPA significantly influenced solid‐state polyamidation by reducing the reaction rate and changing the prevailing mechanism. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 104: 1609–1619, 2007