dicumyl peroxide(DCP)and azobisisobutyronitrile(AIBN)were used to initiate polymerization of liquid vinylpolycarbosilane( VHPCS). The curing reaction kinetics of VHPCS/AIBN
VHPCS/DCP systems were studied by non-isothermal differential scanning calorimetry (DSC). The related kinetic parameters were analyzed by Kissinger equation and Crane equation
and the nth-order curing models of both systems were obtained based on these curing kinetic parameters. The curing process temperatures of two systems were determined by the
β
-T extrapolation method. In addition
the cross-linking mechanism of VHPCS and the thermal property of cross-linked products were also studied. The results showed that the activation energy E of VHPCS/AIBN
VHPCS/DCP systems were 72. 17 KJ/mol
94. 11 KJ/mol
and the reaction order
n
were 0. 92
0. 93
respectively. The characteristic temperatures of VHPCS/AIBN
VHPCS/DCP systems were approximate gelling temperature of 55℃
peak temperature of 110℃
107℃
termination temperature of 129. 5℃
134℃
respectively. FTIR result indicated that the cross-linking of VHPCS mainly by self-polymerization of vinyl group. The mass residue of cross-linked products were higher than that of VHPCS.