Electrical and thermal behavior of proton irradiated polymeric blends

摘要

Polymeric blends of polyvinyl chloride (PVC) and polyethylene terephthalate (PET) have been irradiated with 3 MeV proton beam at different fluences. The radiation induced changes in electrical and thermal properties were investigated by the LCR meter in the frequency range 0.1-100 kHz, thennogravimetric analysis (TGA), differential scanning calorimetry (DSC) and Fourier transform infrared (FTIR) spectroscopy. It is found that AC conductivity increases exponentially with log of frequency. The dielectric constant/loss are observed to change significantly due to the irradiation. TGA study indicates the degradation of polymer under proton irradiation and makes it to start decompose earlier than pristine sample. The DSC measurements exhibit significant change in their melting behavior. FTIR spectra reveal that material suffers serious degradation through bond breaking at the fluence of 10(14) ions/cm(2) and above.