以六甲基二硅氧烷、1，3-二乙烯基-1，1，3，3-四甲基二硅氧烷和正硅酸乙酯为原料，通过水解缩合反应制备了乙烯基MQ硅树脂(M为R₃SiO_1/2，Q为SiO_4/2)，考察了聚合条件对产物性能的影响．以该MQ硅树脂为填料，端乙烯基聚二甲基硅氧烷(PVMS)为基础聚合物，聚甲基氢硅氧烷为交联剂，在铂催化剂催化下硫化成型，获得乙烯基MQ硅树脂增强的加成型室温硫化(RTV)硅橡胶，探讨了制备工艺对硫化硅橡胶力学性能和透明性的影响．结果表明：当盐酸浓度为4.0% 、乙醇浓度为1.6%、M/Q摩尔比为0.75时，所制得的MQ硅树脂的补强效果较好；当PVMS/MQ硅树脂质量比为1，si-H和si-Vi摩尔比为1.4、催化剂含量为10μg/g、抑制剂含量为0.3mg/g时，所制得的硫化硅橡胶的拉伸强度可达7.2 MPa，并具有很好的透明性，说明MQ硅树脂的增强作用明显．

Vinyl MQ silicone resin(M and Q respectively represent R₃SiO_1/2 and SiO_4/2)was synthesized via the hydrolytic condensation of hexamethyldisiloxane,1,3-divinyl-1,1,3,3 tetramethyldisil0xane and tetraethyl orthosi-licate,and the effects of polymerization conditions on the properties of the product were investigated.Then,a series of room-temperature vulcanizing(RTV)silicone rubbers reinforced with vinyl MQ silicone resin were prepared from vinyherminated polydimethylsiloxane(PVMS)cured with organohydrogenpolysiloxane under the catalysis of Pt cata-lyst.Finally,the effects of the preparation process on the mechanical properties and transparency of the cured sili-cone rubbers were investigated.The results show that the synthesized MQ silicone resin is of the best reinforcement effeet when HCl and ethanol contents are respectively 4.0% and 1.6% and when the M/Q molar ratio is 0.75,and that,when the mass ratio of PVMS to MQ silicone resin is 1,the molar ratio of Si-H to Si-Vi is 1.4,the catalyst dosage is 10μg/g and the inhibitor dosage is 0.3 m/g,the cured silicone rubbers are of a tensile strength being up to 7.2 MPa and of excellent transparency owing to the reinforcement of MQ silicone resin.