CE／HBPSi／GO复合材料的制备与性能

采用硅烷偶联剂表面处理的氧化石墨烯(GO)与氰酸酯树脂(CE)／超支化聚硅氧烷(HBPSi)共混制备了CE／HBPSi／GO复合材料，研究了GO含量对复合材料力学性能、介电性能、热稳定性和吸水率的影响。结果表明，添加适量GO可以有效提高CE／HBPSi的韧性和强度，还可以改善其介电性能、热稳定性和耐湿性。当GO的质量分数为0.8%时，CE／HBPSi／GO复合材料的冲击强度和弯曲强度达到最大值，分别为15.1 kJ／m2和131.6 MPa，并且该体系的介电常数、介电损耗角正切和吸水率均低于CE／HBPSi体系，热稳定性优于CE／HBPSi体系。

Preparation and Properties of Cyanate Resin/Hyperbranched Polysiloxane/Graphene Oxide Composites

Cyanate resin (CE)/hyperbranched polysiloxane (HBPSi)/graphene oxide (GO) composites were prepared with silane treated GO and CE/HBPSi via melting blend method. The effects of mass fraction of GO on the mechanical,dielectric, thermal stability and water absorption of CE/HBPSi/GO composites were studied. The results show that appropriate addition of GO can improve the toughness and strength as well as dielectric,thermal and water resistance properties of CE/HBPSi. When the mass fraction of GO is 0.8%,the impact strength (15.1 kJ/m2) and flexural strength(131.6 MPa) of CE/HBPSi/GO composites achieve the maximum,meanwhile,CE/HBPSi/GO composites exhibit lower dielectric constant,dielectric loss factor and water absorption,and better thermal stability than that of CE/HBPSi system.