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Preparation, property characterization and UV‐converting application of poly(conjugated azomethine‐urethane)/hydroxyl polyacrylate resin
Author(s) -
Liu CanPei,
Wang ManKai,
Xiao Quan
Publication year - 2013
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.39111
Subject(s) - materials science , thermogravimetric analysis , polyurethane , fourier transform infrared spectroscopy , polymer chemistry , glass transition , thermal stability , fluorescence , isocyanate , polymer , chemical engineering , chemistry , organic chemistry , composite material , physics , quantum mechanics , engineering
A functional polyurethane coating with ultraviolet (UV) rays converting ability of changing higher energy UV rays into lower ones was prepared from poly(conjugated azomethine‐urethane) (CAUP) reacting with hydroxyl polyacrylate resin (HPAR). As an oligomeric isocyanate, CAUP was prepared in a reaction of toluene‐2,4‐diisocyanate with N , N ′‐bis(4‐hydroxyl‐3‐methoxybenzylidene)‐ o , m or p ‐diaminobenzene that was synthesized from vanillin and o ‐phenylenediamine or m ‐phenylenediamine or p ‐phenylenediamine. Fourier transform infrared spectroscopy, 1 H‐NMR, UV–vis, and fluorescence spectra were used to characterize those synthesized products and HPAR/CAUP films. UV‐converting abilities of HPAR/CAUP films had been demonstrated by natural exposure to ageing and the fluorescence emission spectra of HPAR/CAUP films and CAUP solutions. Red‐shift phenomena in the fluorescence emission spectra were due to molecule aggregations and stacks caused by intramolecular and intermolecular interactions such as hydrogen bonding effects. Dynamic mechanical thermal analysis and thermogravimetric analysis techniques were employed to study their mechanical and thermal properties of HPAR/CAUP films. The films exhibited excellent mechanical properties and owned high glass transition temperatures over 97.0°C, and their maximum thermal degradation temperatures were about 176.0°C. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci., 2013