Copolymerization of functional cyclotrisiloxanes – a reactivity comparison (in English)
Polimery 2010, No 7/8, 503
Kinetics of controlled simultaneous copolymerization of hexamethylcyclotrisiloxane (D3) with functional cyclotrisiloxanes was studied using n-BuLi in THF as initiator. Trifunctional (MeXSiO)3 (X3), where X=vinyl, trifluoropropyl or chloropropyl group, and monofunctional monomers [(Me2SiO)2MeXSiO] (D2X), where X=cyanopropyl or n-octyl group, were used as monomers. Reactivity ratios for each pair of comonomers were determined and the possibility of synthesis of gradient copolymers by this method is discussed.
Key words: cyclosiloxanes, polysiloxanes, gradient copolymers, anionic ring opening polymerization, reactivity ratio
Copolymerization of functional cyclotrisiloxanes - a reactivity comparison (in English)