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Indexed by:期刊论文

Date of Publication:2004-04-15

Journal:JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY

Included Journals:Scopus、SCIE、EI

Volume:42

Issue:8

Page Number:2026-2030

ISSN No.:0887-624X

Key Words:polycondensation; high performance; synthesis

Abstract:A series of novel aromatic diamines (2-4) containing the alkyl-, aryl, or chloro-substituted group of phthalazinone segments were synthesized via two synthetic steps starting from 4-(3-R-4-hydroxyphenyl)-2,3-phthalazinone-1 (R = Ph, CH3, Cl). Three series of aromatic polyamides containing phthalazinone moieties were prepared through diamines 2-4 reacting with different aromatic dicarboxylic acids via a direct Yamazaki-Higashi phosphorylation polycondensation reaction. The resulting aromatic polyamides had inherent viscosities in the range of 0.40-0.76 dL/g. The thermal property of the polyamides was examined with DSC and thermogravimetric analysis. The glass-transition temperatures of these polyamides ranged from 298 to 340 degreesC. The 10% mass-loss temperature was above 405degreesC under nitrogen. Structures of monomers 2-4 and the polymers were confirmed by Fourier transform infrared spectroscopy, H-1 NMR, and mass spectrometry. Good solubility of these polymers in polar solvents such as N-methylpyrrolidone, dimethylformamide, dimethylacetamide (DMAc), and m-cresol was observed, and tough, flexible films were obtained from the polymer's DMAc solutions. The effect of the substituted group on the physical property of polymers was also investigated. (C) 2004 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 42: 2026-2030,2004.