有机硅/聚醚胺复合固化剂改性环氧树脂及其性能研究

Synthesis and Properties of Silicone/ polyether amine cured Epoxy Resin

摘要:

以二甲基二乙氧基硅烷、γ-氨丙基三乙氧基硅烷、二苯基二甲氧基硅烷为单体，通过水解、缩聚制备了含有氨基活性功能基团的有机硅低聚物（PS），然后以PS与聚醚胺与环氧树脂进行固化交联得到机硅改性环氧树脂，研究探讨了PS含量对改环氧树脂耐热性、力学性能及吸水性能的影响。结果表明：当PS添加量为基体树脂的30%时，改性树脂的耐热性能有明显提高，800oC残留量为26.45%，拉伸强度为68.27MPa，弯曲强度为81.68MPa，与水表面接触角为109.3°，吸水率为2.59%，比未改性树脂分别提高了17.24% ,6.6%，17.3%，21.3%和降低了0.12%。

Abstract:

Silicone with functional amino group was synthesized by several silicone monomers though hydrolysis and condensation. Different content of silicones modified epoxy resin was prepared though curing reaction of silicone and epoxy resin and curing agent. The influences of different silicone content on the properties of the modified epoxy resin were investigated. The results indicated that: with 30% addition, the tensile strength was 68.27MPa, bending strength was 81.68MPa, 800 oC residues was 26.45%, contact angle was 109.3°, 24h water absorption was 2.59%, which was 17.24%, 6.6%, 17.3%, 21.3% much higher and 0.12% lower than the original resin.