Abstract
High molecular weight copolymers, referred to as polysilalkylene siloxanes or hybrid silicones, were prepared using anionic ROP of 1,1,3,3,14,14,16,16-octamethyl-2,15-dioxa-1,3,14,16-tetrasilacyclohexacosane (II) and octamethylcyclotetrasiloxane (D4) mixtures. The resultant gum-like polymers were characterized by 1H NMR, 13C NMR, 29Si NMR, FTIR, GPC, TGA and FTIR. It was determined that the resultant polymers possessed a ratio of alkylene to dimethylsiloxane units similar to that expected from the original monomer ratio. Number averaged molecular weights ranged from 111,000 to 160,900 g/mol in yields of 75% to 78%. In addition, the thermal stability of the poly(decanylene-co-dimethylsiloxane)s were similar to that of the homopolymer based on II.
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