Polycarbosilanes as Precursors to Ceramics and as Functional Polymeric Materials

伦纳德·英特兰特教授和合作伙伴托马斯M. Apple和Chang Ryu都来自Rensselaer Polytechnic Institute，他们的研究得到了无机，生物无机和有机化学计划的支持，重点是合成和研究一类含有由亚甲基桥接的Si原子的有机硅聚合物。 采用固体核磁共振谱、光学显微镜等方法，对SiC/BN陶瓷混合物的聚合物相分离、交联和热解过程进行了监测。此外，将探索聚（甲硅烯基乙烯）的接枝共聚物和含有聚（碳硅氧烷）的嵌段共聚物，以实现以介孔固体、可控形状和尺寸的纳米颗粒或陶瓷相在基底表面上的点或线的有序阵列的形式制备Si基陶瓷。 拟议的研究旨在扩展对聚合物（特别是接枝和嵌段共聚物）相分离的理解，以包括含聚碳硅烷和聚碳硅氧烷的聚合物，并探讨了利用这种相分离方法制备纳米Si-2 O-3的前景。聚合物陶瓷前体的研究将扩展对接枝和嵌段的理解，共聚物相分离以包括含聚碳硅烷和含聚碳烷的聚合物。 同时，还将探讨利用这种相分离技术获得具有可预测和可控制的微观结构或最终形态的纳米结构硅基陶瓷材料的前景。 这项研究将提供合成路线的金属或陶瓷纳米复合材料，可能有各种应用，包括低k膜，热和化学稳定的弹性体，和离子电解质材料。 研究生，本科生和博士后助理将在跨学科无机化学计划中接受合成材料方法学和陶瓷材料聚合物前体研究的优秀培训。

Prof. Leonard Interrante, and coPIs Thomas M. Apple and Chang Ryu, all of Rensselaer Polytechnic Institute, are supported by the Inorganic, Bioinorganic and Organometallic Chemistry program for their research that focuses on the synthesis and study of a class of organosilicon polymers that contain Si atoms bridged by methylene groups These precursors have possible applications as precursors to ceramics and as functional polymeric materials. Solid-state NMR spectroscopy, optical microscopy and other methods, will be used to monitor the processes of polymer phase separation, cross-linking and pyrolysis to SiC/BN ceramic mixtures. Additionally, the graft copolymers of poly(silylenemethylene)s and block copolymers containing poly(carbosiloxane)s will be explored to achieve the preparation of Si-based ceramics in the form of mesoporous solids, nanoparticles of controlled shapes and sizes, or as ordered arrays of the ceramic phase as dots or lines on a substrate surface. The proposed research seeks to extend the understanding of polymer, particularly graft and block copolymer, phase separation to include polycarbosilane- and polycarbosiloxane-containing polymers, and to explore the prospect that such phase separation can be used to obtain nanostructured Si-based ceramic materials with predictable and controlled microstructures or final forms.This study of polymer precursors to ceramics will extend the understanding of graft and block copolymer phase separation to include polycarbosilane- and polycarbosiloxane-containing polymers. Also, the prospect that such phase separation can be used to obtain nanostructured Si-based ceramic materials with predictable and controlled microstructures or final forms will be explored. This research will provide synthetic routes to metal- or semiconductor-containing ceramic nanocomposites that may have a variety of applications including low-k films, thermal and chemically stable elastomers, and ionic electrolyte materials. Graduate students, undergraduate students and postdoctoral associates will receive excellent training in synthetic materials methodology and the study of polymeric precursors to ceramic materials in an interdisciplinary inorganic chemistry program.