Abstract
This paper reviews different methods of synthesis of polysilalkylene or silarylene siloxanesthat are sometimes called “hybrid” silicones. This special type of silicone has beendeveloped to avoid the drawback of the depolymerization of classical polysiloxanes in certain conditionsand to obtain elastomers with enhanced thermal and fuel resistance properties. These silicones havebeen prepared through two main routes: the polycondensation of α,ω-bis silanol monomers(prepared either via an organometallic route or via hydrosilylation of α,ω-dienes) andthe polyhydrosilylation of α,ω-dienes with dihydrodisiloxanes or oligosiloxanes.