Study On Cyanate-Epoxy Ester Resin (CE-EP)Copolymer And Polyhedral Oligomeric Silsesquixane (POSS) Hybrid Materials

Cyanate ester resin (CE) possesses very low dielectric constant and dielectric loss in a wide temperature and frequency range. It has also balanced heat resistance and processing properties. As a consequence, CE is suggested to be a potential resin for high performance composites. However, the toughness and modulus of CE are not satisfied. The purpose of this work is to develop a new kind of CE-based composite with excellent mechanical, thermal and dielectric properties. It is also of value to provide a broad understanding about the modification of other thermoset polymer systems.This dissertation is composed of three parts. First, study on the properties of cyannate-epoxy ester resin (CE-EP) copolymer; second, study on thermal properties of CE/polyhedral oligomeric silsesquioxane (POSS) composites; third, further study on morphology, thermal and mechanical properties of CE-EP/POSS composites.In the first part, the influence of different kinds of metal catalyst on co-curing reaction of EP-CE copolymer was studied by differential scanning calorimetry (DSC). In addition, thermal, electric and mechanical properties of co-curing system was also studied by DSC thermal gravimetric analyses (TGA) and thermal mechanical analyses (TMA). The results showed that manganous octanolate catalyst can obviously accelerate the curing of the resin to decrease the curing...