PC/POSS复合材料的制备及热性能  

Preparation and Thermal Properties of PC/POSS Composites

作　　者：蔡华轮[1,2] 许凯[1] 刘欢[1,2] 苏江勋[1,2] 刘新[1,2] 付子恩[1,2] 陈鸣才[1] 

机构地区：[1]中国科学院广州化学所,电子有机聚合物材料省重点实验室,广东广州510650 [2]中国科学院研究生院,北京100039

出　　处：《高分子材料科学与工程》2011年第12期114-118,共5页Polymer Materials Science & Engineering

摘　　要：合成及表征了八苯基倍半硅氧烷（PH-POSS）、γ-甲基丙烯酰氧丙基倍半硅氧烷（MA-POSS）,并利用差示扫描量热（DSC）和热重分析（TGA）分别研究其在聚碳酸酯（PC）体系中对体系热性能的影响。研究结果表明,复合材料Tg随着PH-POSS含量的增加而降低;而随着MA-POSS含量的增加基本不受影响。在氮气中,复合材料起始降解温度（T5%）比PC略低,随后其降解速率变慢,最大失重温度（Tmax）提高1℃~15℃。在空气中,复合材料T5%、Tmax均高于PC相应温度,且MA-POSS复合材料的Tmax随MA-POSS添加量的增加而升高22℃~50℃;且两种复合材料700℃残余率增加了5%~12%。Octaphenylsilsesquioxane（PH-POSS） and γ-methacryloxypropyl silsesquioxane（MA-POSS） were prepared and characterized respectively.And then the thermal properties of polycarbonate（PC）/polyhedral oligomeric silsesquioxane（POSS） composites were studied with differential scanning calorimetry and thermogravimetric analysis.The results show that： glass transition temperatures of composites decrease with PH-POSS content increasing;while no insignificant change with MA-POSS content increasing.The degradation temperatures（T5%） of composites under the nitrogen are slightly lower than that of pristine PC,but later composites degradation rates are slower than it and the largest mass loss temperatures（Tmax） of composites are higher than that of PC at a range of 1 ℃～15 ℃.In air,T5% and Tmax of composites are all higher than that of PC,and Tmax of PC/MA-POSS composites increases at a range of 22 ℃～50 ℃ with MA-POSS content increasing,furthermore,the chars of two composites are improved at a range of 5%～12%.

关 键 词：聚碳酸酯 复合材料 笼型倍半硅氧烷 热稳定性 

分 类 号：TQ323.41[化学工程—合成树脂塑料工业]