Abstract:

Hydrosilylation reaction of 4-vinylbenzocyclobutene(4-VBCB) with 1,1,3,3-tetramethyl-1,3-dihydro-disiloxane(TMHS) was employed to afford the monomer of diethyl tetramethyl disiloxane-bisbenzocyclobutene(DES-bis-BCB). The structures of DES-bis-BCB and the prepolymer prepared from DES-bis-BCB by thermal isomerization ring opening polymerization reaction were characterized and analyzed. The surface morphology and thermal stability of the films were investigated by atomic force microscopy(AFM) and thermogravimetric analysis(TGA), respectively. The results showed that the root-mean square(RMS) roughness was 0.53 nm, and the starting mass loss temperature was about 390 ℃. It indicated that DES-bis-BCB exhibited good film-forming property and excellent thermal stability.

Key words: bisbenzocyclobutene, hydrosilylation reaction, thermal properties, film-forming property.