V-POSS/UPR非等温固化动力学与物理性能

为了提高不饱和聚酯树脂(UPR)的性能，本文中以乙烯基笼型倍半硅氧烷(V-POSS)改性不饱和聚酯树脂，用非等温 DSC法研究了UPR和5% V-POSS/UPR体系的固化反应动力学以及表观反应活化能与转化率之间的关系，测定了玻璃钢层压板的力学性能和电性能。结果表明，加入V-POSS固化反应E_a随反应程度增加而降低，通过使用两参数Šesták-Berggren(S-B)模型描述固化反应过程，得到了反应动力学方程。当V-POSS质量分数为5%时玻璃钢层压板拉伸强度达到最大值，提高了17.6 MPa，冲击强度随V-POSS加入量增加而降低，但在10%时冲击强度有所上升。层压板电性能随 V-POSS加入量增加而提高，其中体积电阻率和表面电阻率提高1～2个数量级。

Non-isothermal cure kinetics of V-POSS/UPR and physical properties

In order to improve the performance of unsaturated polyester resin (UPR)，the polyhedral oligomeric silsesquioxane containing vinyl group (V-POSS) was used to modify the unsaturated polyester resins. The curing kinetics and the relationship of apparent activation energy (Ea) with conversionαwere studied by non-isothermal DSC. The properties of mechanics and electricity for the fiberglass-reinforced laminate were determined. The results show that the Ea decreases with increase of conversion α. The curing reaction could be described by autocatalyticŠesták-Berggren (S-B) model and kinetic equations of curing reaction were obtained. The tensile strength of the fiberglass-reinforced laminate increases 17.6 MPa when the mass fraction of V-POSS is up to 5%. The impact strength is lower with V-POSS increase. The electric properties increase with increasing the content of V-POSS，while volume resistivity and surface resistivity rise by 1～2 orders of magnitude.