FUNCTIONALIZATION AND CROSS-LINKING OF PO LY(SILYLENEMETHYLENES)

Functionalized 1,3-disilacyclobutanes (RSiX-CH2)(2) have been prepared by protodesilylation of aminosubstituted 1,3-disilacyclobutanes with triflic acid and by conversions with nucleophiles. The ring-opening po lymerisations of these compounds lead to novel high molecular weight p oly(silylenemethylenes), which are characterized by a linear structure and alternating silicon and carbon atoms in the main chain. The hydro silylation reaction between the poly(silylenemethylenes) (RSiH-CH2)(n) and (RSiVi-CH2)(n) results in a polymer network which may serve as an interesting preceramic material. The structures of the polymers were proven by NMR spectroscopy (Si-29,C-13, H-1).