Title : Studies on sprosiloxane oligomers and polysila hydrocarbons

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035__|a(IN-AhILN)th_454419
040__|aMGND_686560|dIN-AhILN
041__|aeng
100__|aDevapal, Deepa|eResearcher
110__|aSchool Of Chemical Sciences|bMahatma Gandhi University, Kottayam|dKottayam|ein
245__|aStudies on sprosiloxane oligomers and polysila hydrocarbons
260__|aKottayam|bMahatma Gandhi University, Kottayam|cAugust 2006
300__|a303p.|c-|dNone
500__|aReferences given chapters wise
502__|bPhD
518__|dn.d.|oDate of Award
518__|dn.d.|oDate of Registration
520__|aBoron and silicon containing polymers/oligomers have gained importance, in recent years, as they offer many advantages compared to polymers containing only boron/silicon. On pyrolysis in inert atmosphere they give mixed non-oxide ceramics, which possess better high temperature properties and oxidation resistance compared to simple non-oxide ceramics. Hence, they are used as high temperature coatings, thermal protective systems, matrix resins and high temperature elastomers. The aim of the work embodied in the thesis has been to develop thermally stable borosiloxane oligomers and evaluate them as precursors for ceramics and study their end-uses for space applications. Another class of preceramic polymers is polysilahydrocarbons, which contain silicon and carbon in the backbone. In addition to the investigation on borosiloxane oligomers, the present thesis focuses on the thermal degradation behavior of polysilahydrocarbons and their evaluation as atomic oxygen resistant coating for low earth orbit space struc
650__|aPhysical and Basic Sciences|2AIU
653__|aoxidation resistant coatings
653__|aatomic oxygen resistant materials
653__|aglass coating
653__|aceramic matrix composite
653__|aChemistry
653__|aBorosiloxane oligomers
653__|apolysilahydrocarbons
653__|athermal degradation kinetics
653__|apreceramic polymers
653__|aprecursors for ceramics
700__|aPackirisamy, S|eGuide
700__|aNinan, K N|eGuide
856__|uhttp://shodhganga.inflibnet.ac.in/handle/10603/6756|yShodhganga
905__|afromsg

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