Synthesis of silicon-containing vinyl ether monomers and oligomers and their photoinitiated polymerization

摘要: Silicon-containing divinyl ether monomers were synthesized by the addition reaction of glycidyl vinyl (1) with various silyl dichlorides using tetra-n-butylammonium bromide (TBAB) as a catalyst. The 1 diphenyl dichlorosilane gave bis-[1-(chloromethyl)-2-(vinyloxy)-ethyl]diphenyl silane (3a) in 89% yield. Polycondensations 3a terephthalic acid also carried out 1,8-Diazabicyclo[5.4.0]-7-undecene (DBU) to afford silicon-containing polyfunctional oligomers (5). A multifunctional Si-monomer both and methacrylate groups (7) was prepared potassium TBAB phase transfer Photoinitiated cationic polymerizations these compounds proceeded rapidly sulfonium salt, bis-[4-(diphenylsulfonio)phenyl]sulfide-bis-hexafluorophoshate (DPSP), photoinitiator neat mixtures upon UV irradiation. Multifunctional monomer 7 showed hybrid curing properties DPSP radical photoinitiator, 2,4,6-trimethylbenzoyl diphenylphoshine oxide (TPO).