Cross-Linking of Poly 1-hexene-1,5 hexadiene Copolymer (HHC) by Dicumyl Peroxide (DCP)

1-hexene-1,5-hexadiene Copolymer(HHC) was crosslinked by dicumyl peroxide (DCP) at various temperatures (130–2000C). four concentrations of DCP in range 0.4–0.7 wt % were investigated. cross-linking was studied by rubber process analyzer (RPA) and by differential scanning calorimetry (DSC). From RPA data analysis real part modulus G , tan&, and reaction rate were investigated as a function of peroxide content and temperature. The highest G max and the lowest tan & were found for 0.7% of DCP at 1500C. Chain scission was analyzed by slope analysis of conversion ratio, X in times after reaching the maximum. Less susceptible to chain scission are temperatures in range 130–1700C and peroxide levels 0.4–0.6%. Heat of reaction was analyzed by DSC at various heating rates (5–900C min-1). It was found to be exothermic. By projection to zero heating rate, the reaction was found to start at 1300c with the maximum at 1800c