Evaluation of physico-chemical properties of electron beam-irradiated polycarbonate film

摘要

In this work,polycarbonate(PC)film samples were irradiated with 10MeV electrons at different doses ranging from 25 to 250 kGy.Characterization techniques viz.thermogravimetric analysis(TGA),Fourier transform infra-red spectroscopy(FTIR),X-ray diffraction analysis(XRD)and electron paramagnetic resonance(EPR)were exploited to understand the induced changes in the physico-chemical properties of the polymer.An increase in the decomposition temperature with increasing dose was observed,while the crystallinity remained unchanged as a result of the formation of cross-link bond.EPR technique characterized the stability of the free radicals in the irradiated PC.The result showed that cross-linking process occurs at low absorbed doses,whereas polymer degradation happens at higher doses.