SILYL AND SILOXYL SUBSTITUTED CARBORANE COMPOSITIONS WITH UNSATURATED ORGANIC END GROUPS

摘要

A precursor composition includes: (1) at least one cross-linking compound represented by formula (I) wherein: u and x are independently selected positive integers, v and w are independently selected integers greater than or equal to zero, R<1>, R<2>, R<3>, R<4>, R<5>, R<6>, R<7> and R<8> are independently selected from the group consisting of alkyl, aryl, alkylaryl, haloalkyl, haloaryl, and mixtures thereof; A and E are independently selected from the group consisting of O, an aliphatic bridge, an aryl bridge and mixtures thereof; and R<9> and R<10> are unsubstituted or substituted vinyl or ethynyl groups; (2) at least one organosilicon compound containing at least two silicon hybride moieties per molecule, and (3) a hydrosilation catalyst. A cross-linked polymer is formed by reacting the cross-linking compound of formula (I) with the organosilicon compound via a hydrosilation reaction. A thermoset polymer is formed by thermally curing the cross-linked polymer. A boron-carbon-silicon ceramic formed by pyrolyzing the cross-linked polymer.