Hyperbranched polycarbosilanes, polycarbosiloxanes, polycarosilazenes and copolymers thereof

摘要

Hyperbranched polycarbosilanes, polycarbosiloxanes, polycarbosilazenes and copolymers thereof are prepared by reacting a difunctional or polyfunctional monomer having functional groups of one type (A) without any other functional groups capable of reacting significantly during polymerization, and a difunctional or polyfunctional monomer having functional groups of another type (B) without any other functional groups capable of reacting significantly during polymerization, wherein each A-functional group is reacted with a B-functional group, and wherein at least one of the monomers has a functionality of at least three. The process enables hyperbranched polycarbosilanes, polycarbosiloxanes, polycarbosilazenes and copolymers thereof to be prepared at a lower cost than with conventional synthesis processes, and provides greater flexibility in the preparation of a larger variety of different types of hyperbranched polycarbosilanes, polycarbosiloxanes, polycarbosilazenes and copolymers thereof.