笼型倍半硅氧烷形态分析及对杂化材料相容性和机械性能的影响

采用水解缩合方法制备了八乙烯基笼型倍半硅氧烷(OVPOSS), 并将其引入到聚甲基丙烯酸甲酯(PMMA)自凝树脂中, 得到有机-无机杂化材料. 通过傅里叶变换红外光谱(FTIR)、X射线衍射(XRD)、透射电子显微镜(TEM)、扫描电子显微镜(SEM)、差示扫描量热仪(DSC)、塑料球压痕硬度计、高温高速摩擦磨损测试仪和悬臂梁冲击实验等对其形貌和性能进行了研究. 结果表明, OVPOSS以晶体状态存在于PMMA树脂中. 通过DSC热性能曲线、FOX方程和Gordon-Talyor方程曲线发现, 当POSS含量较高时, PMMA-POSS杂化体系能够发生相分离, 对杂化材料的机械性能有一定的影响.

Morphology Analysis of POSS and the Influence on Compatibility and Mechanical Properties of the Hybrid Materials

Octavinyl-polyhedral oligosilsesquioxanes(OVPOSS) was synthesized via hydrolysis and condensation reaction.The organic-inorganic hybrid materials were produced with OVPOSS and polymethylmethacrylate(PMMA) self-curing resins.The hybrid materials were characterized with FTIR,XRD,TEM,SEM,DSC,plastic ball indentation hardness tester,high-temperature friction,wear tester and memory-type cantilever beam impact testing machine.Particularly,morphology and compatibility properties of hybrid materials and OVPOSS particles were discussed.The results indicated that the size of OVPOSS crystal structure began to reduce with the addition particles in the hybrid materials.The compatibility properties show that phase separation occurs in the hybrid systems with higher content of POSS.