condensed POSS (CC-POSS) in the main and side chains, respectively. For the substituents on POSS, we used a combination of phenyl and isobutyl groups and investigated their effects on the physical properties by changing this combination. Notably, the thermal and mechanical properties changed in polymers where the substituents of CO-POSS (main chain) and CC-POSS (side chain) were interchanged. This demonstrates
倍半
硅氧烷材料的物理性质通常通过改变具有不同取代基的
硅烷偶联剂的比例来控制。相比之下,笼状倍半
硅氧烷(多面体低聚倍半
硅氧烷,POSS)可以进行精确的分子设计,材料特性可以通过异构体控制,类似于有机材料。在本研究中,我们合成了主链和侧链分别具有开角 POSS (CO-POSS) 和完全缩合 POSS (CC-POSS) 的聚
氨酯。对于 POSS 上的取代基,我们使用了苯基和异丁基的组合,并通过改变这种组合研究了它们对物理性能的影响。值得注意的是,当 CO-POSS(主链)和 CC-POSS(侧链)的取代基互换时,聚合物的热性能和机械性能发生了变化。这表明异构结构显着影响倍半
硅氧烷基材料的性能,并为这些材料提供了重要的设计指南。