Polysiloxanes are of great interest because of their unique properties such as thermal stability, electrical resistance and hydrophobicity. Functional side groups along the polymer chain can have a significant influence on the physical properties of the polymers and act as handles for further synthetic manipulation. A method is described to synthesize new photoswitchable catalyzed polysiloxane architectures. Therefore novel oxasilacycles have been designed, which are able to undergo a photoinduced acid catalyzed ring opening reaction. The opened oxasilacycles can homopolymerize or copolymerize with hydroxyl terminated polydimethylsiloxanes. The synthesized polysiloxane architectures can be further modified via post synthetic crosslinking reactions. Intramolecular hydrosilylation to oxasilacycles with a precisely defined structural motif for the described reactions are reported. Furthermore photoinduced polymerizable telechelic structures leading to new polysiloxane architectures are shown.

Intramolecular hydrosilylation leads to new precursors for photoswitchable poly(siloxane) architectures

244th National Meeting (2012)

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