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Conversion of polyester into heat‐resistant polyamide by reacting with aromatic diamine compound
Author(s) -
Kim Yangsoo,
Roh HangDuk,
Lee HyungChan
Publication year - 2003
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.13418
Subject(s) - polyamide , amide , diamine , catalysis , polymer chemistry , chemistry , polyester , fourier transform infrared spectroscopy , reactivity (psychology) , solvent , ethylene , organic chemistry , chemical engineering , medicine , alternative medicine , pathology , engineering
The ester–amide exchange reaction between poly(ethylene terephthalate) and p ‐phenylenediamine in n ‐dodecylbenzene as a solvent in the absence of catalyst was carried out to obtain heat‐resistant polyamide. The observation of the amide group generated in the reaction product was made by FTIR analysis and the relative extent of reaction was estimated by the amidation ratio from FTIR and the nitrogen content determined from elemental analysis. The effect of chemical structure in the homologous series of aliphatic and aromatic diamines on the reactivity of ester–amide exchange reaction was studied. How reaction variables such as time, temperature, and the amount of diamine used affected the extent of reaction and the heat‐resistant property of polyamide obtained was thoroughly studied. Finally, a search for an efficient catalyst among metal acetates was attempted. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 91: 2502–2512, 2004