多面体低聚倍半硅氧烷杂化丙烯酸树脂的制备及性能  

Preparation and Properties of Polyhedral Oligomeric Silsesquioxane Hybrid Acrylic

作　　者：陈雅 安秋凤[1] 李卫卫 王笑鸽 王玉峰 Ya Chen;Qiufeng An;Weiwei Li;Xiaoge Wang;Yufeng Wang(Shaanxi Key Laboratory of Auxiliary Chemistry&Technology for Chemical Industry Ministry of Education,Shaanxi University of Science&Technology,Xi'an 710021,China)

机构地区：[1]陕西科技大学陕西省轻化工助剂化学与技术重点实验室,陕西西安710021

出　　处：《高分子材料科学与工程》2020年第9期46-53,共8页Polymer Materials Science & Engineering

基　　金：新型氟硅材料制备关键技术(2017YFB0307700)。

摘　　要：采用二次聚合工艺将七异丁基甲基丙烯酰氧丙基POSS(T8^MA/7i-POSS)、八甲基丙烯酰氧丙基POSS(T8^MA-POSS)与甲基丙烯酸甲酯(MMA)进行自由基聚合反应,制备得到POSS/PMMA杂化材料。通过红外光谱、核磁共振氢谱、X射线衍射等手段对聚合物的结构进行了表征,结果表明多面体低聚倍半硅氧烷(POSS)分子成功被引入聚合物链段中;通过原子力显微镜、扫描电镜对杂化材料形貌进行分析,结果表明POSS的引入增加了杂化材料表面粗糙度,出现明显凹凸结构;通过热重分析、差示扫描量热分析对杂化材料热性能进行分析,结果表明当T8^MA/7i-POSS添加量为20%、T8^MA-POSS添加量为5%时,PMMA的玻璃化转变温度从91.73℃提高到129.58℃,表现出良好的热性能。The free radical polymerization of heptaisobutyl methacryloxypropyl polyhedral oligomeric silsesquioxane(T8^MA/7 i-POSS),octamethyl acryloxypropyl polyhedral oligomeric silsesquioxane(T8^MA-POSS)and methyl methacrylate(MMA)by the secondary polymerization process radical copolymerization was applied to prepare the POSS/PMMA hybrid materials.The structure of the polymer was characterized by FT-IR,^1H-NMR and XRD.The results show that POSS molecules were successfully introduced into the polymer chain segments.The morphology of the hybrid material was analyzed by AFM and SEM.The results show that the introduction of POSS increases the surface roughness of the hybrid material and shows an obvious concave convex structure.DSC analysis shows that the glass transition temperature of PMMA is increased from 91.73℃to 129.58℃when the addition of T8^MA/7 i-POSS is 20%and T8^MA-POSS is 5%.

关 键 词：官能化多面体低聚倍半硅氧烷 杂化材料 改性 聚甲基丙烯酸甲酯 自由基聚合反应 

分 类 号：TB332[一般工业技术—材料科学与工程]