SCHEDULED MAINTENANCE
Metal-free synthesis of alternating silylether–carbosilane copolymers using unsaturated ketones†
*a
and
Masaya
Mitsuishi
*a
Abstract
We report metal-free B(C6F5)3-catalysed hydrosilylation polymerization for alternating silylether–carbosilane copolymers. The reaction was carried out at room temperature using bis(dimethylsilyl)benzene and cyclic and aliphatic unsaturated ketones. It was found that 1,4-conjugation on the unsaturated ketone monomers is important for undergoing hydrosilylation-based polymerization on both C![[double bond, length as m-dash]](https://www.rsc.org/images/entities/char_e001.gif)
O and CC groups. The obtained polymers were characterized by high molecular weight (Mw = 4.23 × 104, PDI = 2.0), tunable Tg (ranging from −7 to 27 °C) and good thermal stability (above 280 °C). Hydrolysis of silylether linkages with an HCl catalyst was demonstrated, revealing an alternating arrangement, which was supported by monitoring the polymerization processes with 1H NMR measurements.
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