Betting Sites Not On GamstopBest Non Gamstop Casinos 2025Kasino OnlineCasino Not On GamstopNon Gamstop Casinos
Journal of the Iranian Chemical Society (JICS)
Published by the Iranian Chemical Society P.O.Box: 13145-887, Tehran, Iran Tel: (+98) 21 66908032-33 Fax: (+98) 21 66908030
Home About Editorial Board Instructions to Authors Subscription Archive Submission Citation Data Advertising Feedback
Quick Search

Article info. : 2004; 1(2) (pp 141~151)

Synthesis and Characterization of New Aromatic Poly(amide-imide)s Derived from Bis(3-trimellitimidophenyl) Phenyl Phosphine Oxide and Various Aromatic Diamines

A. Banihashemi*, B. Tamami and A. Abdolmaleki

Department of Chemistry, College of Sciences, Shiraz University, Shiraz 71454, Iran

(Received 31 August 2003, Accepted 1 March 2004)

����� New aromatic poly(amide-imide)s with high inherent viscosities were prepared by direct polycondensation reaction of diimide-diacid (I) and aromatic diamines using triphenyl phosphite in N-methyl-2-pyrrolidone (NMP)/pyridine solution containing dissolved CaCl2. The bis(3-trimellitimidophenyl) phenyl phosphine oxide (I) was readily obtained by the condensation reaction of bis(3-aminophenyl) phenyl phosphine oxide (BAPPO) with trimellitic anhydride. The resulting poly(amide-imide)s showed high thermostability. Their decomposition temperatures at 10% weight loss in nitrogen atmosphere were above 532 �C and the anaerobic char yield at 800 �C ranged from 56% to 74%. Almost all the poly(amide-imide)s showed high glass transition temperature above 233 �C by differential scanning calorimetry (DSC) measurements. These polymers were readily soluble in various organic solvents and by their casting into transparent, tough and flexible films can be easily achieved.

Keywords: Aromatic poly(amide-imide)s, Polycondensation, Characterization, Thermostability

2005 � Copyright JICS , Iranian Chemical Society