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Synthesis and characterization of new 4-vinylsilylbenzocyclobutene/vinylsilylbenzene random copolymers

In this work, a copolymerization of 4-(1′,1′-dimethyl-1′-vinyl) silylbenzocyclobutene (4-DMVSBCB) and CH2=CHSiMe2Ph (DMVSPh), which have similar structure, was performed by the anionic polymerization method, leading to a synthesis of a series of cross-linkable random copolymers. Attractively, the 4-DMVSBCB/DMVSPh ratio in the copolymer was almost consistent with the DMVSPh/4-DMVSBCB feed ratio, which allows the control of polymer structure. Most importantly, the replacement of partial 4-DMVSBCB by DMVSPh units provided relatively economical materials which were capable of preserving almost all the advantages of poly(4-DMVSBCB). Furthermore, the curing dynamic of copolymers can be tuned by varying 4-DMVSBCB incorporation ratio.