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Optimum temperature profile for noncatalytic reaction to produce polyamide hot melt adhesives
Author(s) -
Heidarian J.,
Ghasem N. M.,
Wan Daud W. M. A.
Publication year - 2005
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.22714
Subject(s) - mixing (physics) , materials science , polyamide , reaction rate , composite material , chemical engineering , chemistry , catalysis , organic chemistry , physics , quantum mechanics , engineering
Foaming is a general problem in the manufacturing of fatty polyamides. It is mainly affected by the mixing rate and reaction temperature. The effect of the reaction temperature and rate of mixing on foaming are investigated. Time minimization for the polyamidation reaction to prevent foaming is performed. The process constraints are the rate of temperature increase and the rate of the production of water. It is found that with an increase in the mixing rate, foaming starts at lower temperatures and with a decrease in the mixing rate, foaming only starts at high temperatures. For each mixing rate, with an increase in the temperature, the duration of foaming is shorter because the increase in the rate of foaming ends. Temperature profiles with time for different mixing rates are generated, and it is found that the reaction time decreases with increasing mixing rate. The generated temperature profiles are verified experimentally, and no foaming is observed. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 1817–1822, 2006