Preparation of Highly Regular Poly(1-hydrido-1,3,3,5,5-pentamethyltrisiloxane) and Its Chemical Modification by Hydrosilylation

摘要: High molecular weight poly(1-hydrido-1,3,3,5,5-pentamethyltrisiloxane) (II) with a highly regular microstructure has been prepared by dilithium diphenylsilanediolate-catalyzed ring-opening polymerization of 1,3,3,5,5-pentamethylcyclotrisiloxane. The II was determined 29Si NMR. Chemical modification achieved. Quantitative hydrosilylation benzophenone can be catalyzed activated dihydridocarbonyltris(triphenylphosphine)ruthenium. Karstedt-catalyzed pentafluorostyrene high modified copolymers also have microstructures.