Please use this identifier to cite or link to this item:
|標題:||Facile, One-Pot Synthesis of Aromatic Diamine-Based Benzoxazines and Their Advantages Over Diamines as Epoxy Hardeners||作者:||Chang, S.L.
|關鍵字:||crosslinking;ring-opening polymerization;thermosets;high-performance thermosets;main-chain;mechanical characterization;thermal polymerization;click chemistry;cross-linking;polybenzoxazines;monomers;polymers;phthalonitrile||Project:||Journal of Polymer Science Part a-Polymer Chemistry||期刊/報告no：:||Journal of Polymer Science Part a-Polymer Chemistry, Volume 48, Issue 11, Page(s) 2430-2437.||摘要:||
Three aromatic diamine-based benzoxazines were successfully prepared by a facile, clean, one-pot procedure from 1,4-phenylenediamine (1), 4,4'-diaminodiphenyl ether (2), and 4,4'-diaminodiphenyl methane (3), respectively. Their structures were confirmed by NMR spectra and single crystal diffractogram. The effect of the reactivity of diamines on the purity of the resultant benzoxazines was discussed. The resultant benzoxazines were applied as hardeners for cresol novolac epoxy (CNE). The processing window, the latent curing characteristic, and the miscibility of benzoxazine/CNE systems were discussed. Compared with diamines (1 and 3), (1 and 3)-based benzoxazines show latent curing characteristic as epoxy hardeners, and wide processing windows can be obtained. Compared with diamine (2) which is immiscible with CNE in the molten state, (2)-based benzoxazine shows good miscibility with CNE. Dynamic mechanical analysis shows the T(g)s of the benzoxazine/CNE thermosets are as high as 242-243 degrees C. Thermogravimetric analysis shows the outstanding thermal stability of the resultant thermosets. (C) 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 2430-2437, 2010
|Appears in Collections:||化學工程學系所|
Show full item record
TAIR Related Article
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.