Inorganic/Organic Hybrids with Controlled Topology and Composition

本研究旨在探索通过控制两段聚合制备的无机/有机杂化材料的合成和表征。双嵌段共聚物、三嵌段共聚物、星形共聚物和梳状共聚物将成为混合动力车设计中使用的基本结构。无机部分将采用聚硅氧烷、聚磷腈和聚硅氧烷。苯乙烯、丙烯酸酯和甲基丙烯酸酯的原子转移自由基聚合（ATRP）可以得到具有预定分子量和低多分散性的有机片段。产物的组成、分子量、多分散性和结构将影响组分的混相性、形貌、热性能和力学性能。无机段和有机段的结构参数将系统地变化，以将它们与杂交体的宏观性质联系起来。无机和有机聚合物各有优点，但也有缺点。通过共价键将无机聚合物和有机聚合物结合合成的杂化材料应该能够优化一段的电子、光学、生物和环境性能，同时改善另一段的机械性能和可加工性，并探索杂化结构特有的新性能。* * *

9871450 Matyjaszewski The proposed research explores the synthesis and characterization of inorganic / organic hybrid materials produced by controlled polymerization of both segments. Diblock, triblock, star and comb-like copolymers will be the fundamental architectures utilized in the design of the hybrids. Polysilylenes, polyphosphazenes and polysiloxanes will be used as the inorganic segments. Atom transfer radical polymerization (ATRP) of styrenes, acrylates and methacrylates will afford organic segments with predetermined molecular weights and low polydisperisties. The product composition, molecular weight, polydispersities and architecture of the hybrids will influence component miscibilities, morphologies, thermal and mechanical properties. The structural parameters of inorganic and organic segments will be systematically varied to correlate them with the macroscopic properties of hybrids. %%% Inorganic and organic polymers have several advantages but also some drawbacks specific for each category. The hybrid materials synthesized by combining inorganic and organic polymers via covalent linkages should enable optimization of the electronic, optical, biological and environmental properties of one segment in conjunction with improved mechanical properties and processibility imparted by the other and explore new properties specific for the hybrid structure. ***