Premium
Improvement of thermal stability of new heteroaromatic poly(azomethine urethane)s
Author(s) -
Issam A. M.,
Ismail J.
Publication year - 2006
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.23461
Subject(s) - hexamethylene diisocyanate , thermogravimetric analysis , thermal stability , differential scanning calorimetry , polymer chemistry , polyurethane , polymer , materials science , crystallinity , fourier transform infrared spectroscopy , methylene , toluene diisocyanate , chemistry , chemical engineering , organic chemistry , composite material , physics , engineering , thermodynamics
New poly(azomethine urethane)s were synthesized in the conventional literature manner by reacting a new bisphenol‐containing azomethine group, N , N ′‐bis(4‐hydroxyl‐3‐methoxy benzylidine)‐2,6‐diaminopyridine (I) with various diisocyanates, such as hexamethylene diisocyanate (HDI) (a), methylene‐4,4′‐diphenyl diisocyanate (MDI) (b), and toluene‐2,4‐diisocyanate (TDI) (c). The resulting polymers I(a–c) were confirmed by 1 H‐NMR, FTIR, UV, and CHN analyses. Thermogravimetric analysis (TGA) revealed that the polymers have high thermal stability. A semicrystalline behavior was noticed for polymers by wide‐angle X‐ray diffraction (WAXD) and differential scanning calorimetry (DSC). © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 1198–1204, 2006