Spectroscopic and Thermal Studies on Irradiated Poly (Ethylene Maleic Anhydride)

Abstract

Radiation effects in Poly (ethylene maleic anhydride) (MANPE) have been investigated by Electron spin resonance (ESR), Fourier transform infrared (FTIR) and Differential scanning calorimeter (DSC) techniques. The ESR spectra of MNAPE under conditions like radiation dose and temperature have been recorded on irradiation. Alkyl group formed in MANPE which abstract oxygen and convert to peroxy radical on increase of radiation dose. More number of chain cleavages occur producing more number of free radicals which resulted increase in intensities of ESR spectrum. With the increase of temperature the free radical formed in MANPE may react with themselves or with other radical, resulting in the decay of ESR signals at high temperature. The FTIR spectra of irradiated MANPE possess absorption bands at ‐ and positions indicating the presence of OH and C = O groups. The DSC data suggests that on irradiation the melting point slightly increases due to the formation of network structure.