中文摘要：

发展一有效并且改进增加的热、机械的性质的简历兼容机方法类型液体硅酮橡胶(LSR ) ，一系列修改 LSR 样品被单身地或在里面介绍 octavinyl 多面的 oligosilsesquioxanes (VPOSS ) 和高纯净硅大音阶的第五音准备在橡胶的硬化前的联合。重要关联在 VPOSS 和热性质的装载的率之间被发现。然而，机械性质否定地在试验的范围以内与 VPOSS 内容被相关，它可以被归功于到材料不平的分发和聚集引起的缺点。而且，测试结果同意了介绍确实影响的硅大音阶的第五音由制止材料缺点的聚合物的稳定性由 POSS 分子和改善十字的聚集引起了连接密度。例如，增加硅大音阶的第五音的 10%-20% 进 VPOSS (1.0%) 修改了 LSR 增加将由 43.9%-85.7% 撕抵抗，延伸在由 31.7%-57.3% 碎，在 800 牴湯敧 ? 的残余桰瑯 ' 仪Ｇ矛椶鲾超 _? 浳污敬 ?慢摮朠灡 s

英文摘要：

To develop an efficient and bio-compatible way to improve the thermal and mechanical properties of addition type liquid silicone rubber（LSR）, a series of modified LSR samples were prepared by introducing octavinyl-polyhedral oligosilsesquioxanes（VPOSS） and high purity silicon sol singly or in combination before vulcanization. Significant correlation was found between the loading rate of VPOSS and thermal properties. However, mechanical properties were negatively correlated with VPOSS content within the range experimented, which may be ascribed to material defect caused by uneven distribution and aggregation. Furthermore, test results approved that the introducing of silicon sol indeed affected the stabilities of the polymer by restraining the material defect caused by the aggregation of POSS molecules and improving cross link density. For example, adding 10%-20% of silicon sol into VPOSS（1.0%） modified LSR will increase tear resistance by 43.9%-85.7%, elongation at break by 31.7%-57.3%, residue at 800 ℃ in N2 atmosphere by 32.0%-37.9%, residue at 650 ℃ in air atmosphere by 70.9%-91.6%, respectively. This work proves that, to incorporate VPOSS into LSR by hydrosilylation, and to use silicon sol as dispersant and reinforce filler can become an efficient way to improve the mechanical property, thermal stability and bio-compatibility of LSR in the future.