Beschreibung:
<jats:p>The kinetics of UV curable thiol-hyperbranched polysilazanes (HBP) was studied by differential photo-scanning calorimeter (DPC) technology. The effects of photo initiator concentration [I], light intensity I<jats:sub>0</jats:sub> and temperature on the UV curing rate and the final unsaturated double bond conversion of thiol-HBP were investigated. The results indicate that the dependence of polymerization rate Rp on [I] and I<jats:sub>0</jats:sub>, respectively, was found to fit with theoretical predictions very well at [I] no more than 0.50wt% and I<jats:sub>0</jats:sub> lower than 19.40mW/cm2. The kinetic parameters were calculated by autocatalytic model, and correspondingly, the total apparent reaction exponent and apparent activation energy are 8.76 and 13.97kJ/mol, respectively.</jats:p>