采用八甲基环四硅氧烷(D4 )、甲基二乙氧基乙二胺丙基硅烷(DL 602)为单体,以六甲基二硅氧烷(MM)为封端剂合成不同粘度的侧氨基聚硅氧烷(SAPS),并用合成的侧氨基聚硅氧烷来改性环氧树脂(E 44),制备一系列的样品.通过动态机械热分析(DMTA)、接触角仪、电子拉力试验机以及扫描电镜(SEM)对其进行研究.结果表明对于含固定侧氨基比例的聚硅氧烷,其与环氧树脂的相容性随着聚硅氧烷的粘度先增大后减小;含侧氨基聚硅氧烷能有效增韧环氧树脂,而且SAPS粘度越大,被改性的环氧基体的抗冲击强度就越高.A series of polysiloxane with side amino (SAPS) and various viscosities were synthesized.Epoxy resin was modified with SAPS and a series of samples were prepared.They were characterized by using dynamic mechanical thermal analysis(DMTA)、tensile and impact、contact angle measurement and SEM techniques.DMTA data illustrates that the T_g of the matrix decreases when it is modified with SAPS.The results show that the compatibilities of SAPS and Epoxy are changed with viscosities of SAPS.When the viscosities of SAPS are moderate,they are more compatible with epoxy.The results of mechanical test and measurement show that SAPS can elasticize epoxy resin,and impact strength can be largely improved.SAPS of larger viscosities can elasticize epoxy better.The larger the viscosities are,the greater the phase separation between the two compositions.In addition,the result of contact angle measurement indicates that the enrichment of polysiloxane on the resin surface is not affected with the different viscosities of SAPS
