Cross-linkable Poly(methyl vinyl)siloxane and Poly(dimethylsiloxane-co-methyl-vinylsiloxane) were synthesized via ring-opening polymerization which was initiated by a superbase 1-tertButyl-4,4,4-tris(dimethylamino)-2, 2-bis [tris(dimethylamino)-phosphoranylidenamino]- 2Λ5, 4Λ5-catenadi(phosphazene). The cyclic oligosiloxane monomers used in the preparation of the polysiloxanes were 2,4,6,8-tetramethyl-2,4,6,8-tetravinylcyclo-tetrasiloxane (DV4) and octamethyl-cyclotetrasiloxane (D4), while 1,3-divinyl tetramethyl-disiloxane was used as the end-capping reagent. Fourier transform infrared spectroscopy, 29Si and 1H nuclear magnetic resonance spectroscopy, gel permeation chromatography, and traditional viscometry were employed to characterized the synthesized polysiloxanes. It was found that the synthesized polymers possessed a narrow molecular weight distribution with their polydispersity values less than 2, and the synthesized copolymers had a random microstructure formed by random combination of Si-dimethyl unit from D4 and Si-methylvinyl unit from DV4.
Anionic Ring-opening Polymerization, Cross-linkable, Polysiloxane, Superbase Catalyst
Horng-Jer Tai , Nan-Ming Yeh , Zhi-Hong Gao "Synthesis And Properties Of Cross-linkable Polysiloxane Using A Super Base Catalyst" Iconic Research And Engineering Journals Volume 3 Issue 8 2020 Page 42-45
Horng-Jer Tai , Nan-Ming Yeh , Zhi-Hong Gao "Synthesis And Properties Of Cross-linkable Polysiloxane Using A Super Base Catalyst" Iconic Research And Engineering Journals, 3(8)