Jung Youngsuk, Byun Sunjung, Park Sungjun, Lee Hyunmi
Analytical Science Group, Samsung Advanced Institute of Technology , Suwon, Gyeonggi 443-803, Korea.
ACS Appl Mater Interfaces. 2014 May 14;6(9):6054-61. doi: 10.1021/am405099r. Epub 2014 Feb 7.
Through hydrolysis and polycondensation of amino-silane with alkyl bridged silane, a new type of polysilsesquioxane (PSSQ) was obtained. Here we use amine functionalized silane and bis(silyl)ethane to synthesize alkyl chain linked PSSQ. Compared to conventional polyhedral oligomeric silsesquioxane (POSS), this new silane compound has both enhanced thermal stability and improved compatibility with poly(amic acid). Gelation of this silane compound with poly(amic acid) provides polyimide-organosilicate composite materials. We show that films made from solutions of the composites exhibit higher optical transparency and superior dimensional stability during thermal treatment than films of pure polyimide or of polyimide composites with conventional POSS. Bridging of POSS and chemical bonding between POSS and polyimide chains significantly enhance the physical properties. These results provide useful information for designing molecular architecture for the fabrication of high-performance plastic substrates in the future display devices.
通过氨基硅烷与烷基桥联硅烷的水解和缩聚反应，制备了一种新型的聚倍半硅氧烷（PSSQ）。在此，我们使用胺官能化硅烷和双（硅烷基）乙烷来合成烷基链连接的PSSQ。与传统的多面体低聚倍半硅氧烷（POSS）相比，这种新型硅烷化合物兼具增强的热稳定性和与聚（酰胺酸）改善的相容性。该硅烷化合物与聚（酰胺酸）的凝胶化反应提供了聚酰亚胺 - 有机硅酸盐复合材料。我们表明，由复合材料溶液制成的薄膜在热处理过程中比纯聚酰亚胺薄膜或含有传统POSS的聚酰亚胺复合材料薄膜表现出更高的光学透明度和优异的尺寸稳定性。POSS的桥连以及POSS与聚酰亚胺链之间的化学键合显著增强了物理性能。这些结果为未来显示器件中高性能塑料基板制造的分子结构设计提供了有用信息。
