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Thermal degradation of some polymaleamides

D. ROSU1,* , D. IVANOV1

Affiliation

  1. Institute of Macromolecular Chemistry “Petru Poni” 41A Alley Gr, Ghica Voda , Iasi-70487, Romania

Abstract

This study is an investigation on the thermal stability of some unsaturated polymaleamides with aliphatic and aliphaticaromatic structure. The polymaleamides were synthesized by ring opening polyaddition of N,N’-hexamethylen-bisisomaleamide with both an aliphatic-diamine (hexamethylendiamine) and some aromatic diamines (1,4-pheneylenediamine, 4,4’-diaminodiphenyl sulfone, 4,4’-diamino diphenyl methane and 4,4’-diaminodiphenyl ether). The thermal stability of the polymaleamides was examinated in atmospheric air by thermogravimetric analyses, heating the samples from 20 to 6000C with 120C min-1. The thermograms of the studied polymaleamides show a slight increase of the mass samples (0.1-0.5%) with increase of temperature in the interval 30-60 0C. This behaviour was associated with the absorption of oxygen and formation of hydroperoxy structures during the thermal treatment. Thermogravimetric analyses show the presence of three main decomposition stages, which are partial superposed..

Keywords

Polymaleamides, Thermal degradation, Kinetics, Thermal stability.

Submitted at: Aug. 23, 2006
Accepted at: July 15, 2007

Citation

D. ROSU, D. IVANOV, Thermal degradation of some polymaleamides, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 7, pp. 2145-2147 (2007)