Preparation and characterization of nanocomposite films by hybrid cationic ring opening polymerization of glycidyl-POSS

摘要: Abstract Epoxy-polyhedral oligomeric silsesquioxanes (G-POSS) monomers were synthesized from 3-glycidyloxypropyl-trimethoxysilane (GTMS) by hydrolytic condensation. The G-POSS-containing nanocomposite film was prepared hybrid cationic ring-opening polymerization G-POSS and GTMS. curing reaction kinetics, dynamical mechanical properties, thermal degradation properties morphological structures of G-POSS/GTMS system investigated non-isothermal DSC, dynamic analysis (DMA), TGA, AFM SEM. results show that the activation energy Ea decrease when GTMS is added into system, kinetics can be simulated Sestak–Berggren (S–B) model. DMA TG glass transition temperature Tg initial decomposition Tid materials 4 65 °C higher than pure polymerized G-POSS, respectively, content 2 wt%. shows membrane surface has uniform distribution less 1.76 nm high protrusion. SEM have spherical particle on with about 20–25 nm diameter.