• Media type: E-Article
  • Title: Photo Polymerization of Thiol-Hyperbranched Polysilazanes
  • Contributor: Song, Jia Le; Hao, Peng Wei; Ye, Chao Qiang; Chen, Li Xin; Li, Wei Guang
  • imprint: Trans Tech Publications, Ltd., 2013
  • Published in: Advanced Materials Research
  • Language: Not determined
  • DOI: 10.4028/www.scientific.net/amr.683.266
  • ISSN: 1662-8985
  • Keywords: General Engineering
  • Origination:
  • Footnote:
  • Description: <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>