Abstract
Ethyl-
N-phenylmaleimide-4-carboxylate (ENPMC), has been studied as a stabilizer for poly (vinyl chloride), (PVC) against laser radiation. The effects of ENPMC concentration and laser radiation dose on the thermal properties of the polymer have been studied. The results reveal a great improvement in the thermal stability of the polymer in the presence of the organic material. This thermal stability is shown by both thermal gravimetric analysis and the rate of dehydrochlorination of the polymer. The effective concentration for the protection of the polymer against thermal degradation was found to be 10 mmol ENPMC per 100 g PVC. The effect of laser pulses on the polymer stabilized with this concentration of ENPMC have been studied using UV spectroscopy, infra red spectroscopy and thermal gravimetric analysis