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A new route to the functionalization of polysiloxanes is described. Polysiloxanes having pendant silyl ketene acetals are synthesized through hydrosilation of poly(methylhydrosiloxane) with a terminal olefin bearing a silyl ketene acetal. The functionalized polysiloxanes can be reacted with electrophiles such as p-nitrobenzenesulphenyl chloride, affording derivatives having highly polar pendants. These materials have dielectric constants as high as 9 and dissipation factors as low as 0.02-0.06 at 100 kHz at room temperature. The temperature dependencies of the dielectric constants are a function of polar pendant group concentration

Посилання на статтю:

Synthesis and reactions of silyl ketene acetal-modified polysiloxanes. Preparation and preliminary dielectric characterization of some new polysiloxanes / Chia-Yu Yang and Gary E. Wnek // Polymer. – 1992. – Vol 33. – P. 4191-4196.

Synthesis and reactions of silyl ketene acetal-modified polysiloxanes. Preparation and preliminary dielectric characterization of some new polysiloxanes - Завантажити.