Effect of gamma irradiation on tensile strength and pyrolysis behavior of polyvinyl chloride

Pyrolysis-Gas chromatography (Py.GQ technique has been used for the rapid characterization of polyvinyl chloride (PVC). The pyrolysis of the PVC starts as soon as the sample is inserted in the hot zone. The carrier gas rapidly swept the primary products from hot zone to the chromatographic column, so the secondary decomposition is largely eliminated and the pyrolysis products give accurate information about the nature,composition and structure of the polymeric material. The productions of hydrocarbons from PVC are monitored. The effect of the variation of temperature (600-800 degrees C), sample size (0.5-3) mg, pyrolysis atmosphere Nitrogen and Helium, residence time (0.365-1.827) seconds and gamma irradiation on the distribution of products were studied. The effect of gamma irradiation oil tensile strength was also studied. The observed products from PVC were Ethane/Ethene, Propane/Propene, 1.3-Butadiene, 1-Butene, Benzene and Toluene. The yield of these products showed an increase with an increase in temperature from 600-800 degrees C. Gamma irradiation of PVC at doze rate higher than 1 KGry was to decrease the tensile strength and the yield of Ethane/Ethene, propane/propene, 13 Butadiene, and I-Butene decrease, while the yield of Benzene and Toluene remains constant.