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Synthesis of Octa(vinyl)-silsesquioxanes and Copolymerization with Methylmethacrylate

Author: WangShiChen
Tutor: GaoJunGang
School: Hebei University
Course: Polymer Chemistry and Physics
Keywords: Octa(vinyl)-Silsesquioxanes MMA copolymerization
CLC: O634.41
Type: Master's thesis
Year: 2006
Downloads: 204
Quote: 2
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Abstract


The polyhedral silsesquioxanes offer access to new materials with well-defined properties for applications ranging from models of silica surfaces. Of particular interest are the cubic silsesquioxanes (simply as ’cubes’), which offer up to eight reactive sites, one at each vertex, In principle, each site can be functionalized differently, thus cubes can be prepared with diverse sets of functional groups. The resulting multifunctional cubes might serve as precursors to inorganic-organic hybrid materials with highly delineated properties. To realize this potential, we are exploring methods of preparing polyfunctional, processable and polymerizable cubeOcta(vinyl)-Silsesquioxane(OVS) were synthesized by hydrolyze reaction with trimethoxyvinylsilane and tetramethylammonium as raw materals and characterized by means of elemental analysis, FT-IR,1H NMR,13C NMR,29Si NMR.The monomer octa(vinyl)silsesquioxanes was copolymerized with methylmethacrylate-(MMA) by free radical polymerization method. Effect of different polymeric conditions to yield such as temperature, solvent, reaction time and catalysts were investigated in detail. The optimize polymeric conditions were obtained. The structures and properties of hybrid polymers were characterized with IR, DSC, TGA.

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CLC: > Mathematical sciences and chemical > Chemistry > Polymer chemistry ( polymer ) > Elements of the organic polymer > Section IV group elements of organic polymers > Silicone polymer
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