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Zhidk. krist. ikh prakt. ispol'z. = Liq. Cryst. and their Appl., 2009, 4, 75—83.
Influence of Stereoregularity in Comb-Shaped Cyclolinear Methylsiloxane Copolymers on LC State Formation
A. V. Tal'drik, N. V. Chizhova, N. N. Makarova
Author affiliations A. N. Nesmeyanov Institute of Organoelement Compounds. Russian Academy of Sciences
Vavilova Str. 28, 119991, Moscow, Russia E-mail: email@example.com
Abstract Stereoregular cyclolinear methylsiloxane copolymers were synthesized by the reaction of heterofunctional polycondensation of E or Z 2,8-dihydroxy-2,4,4,6,6,8,10,10,12,12-decamethylcyclohexasiloxanes with methyldichlorsilane and methylvinildichlorsilane. New stereoregular comb-shaped polymers with main cyclolinear chain were synthesized by the reaction of hydrosilylation of methylsiloxane copolymers with (4'-cyanobiphen-4-yl)undec-10-anoat, (4'-cyanobiphenoxy)-propylene and their HSiMe2OSiMe2-derivatives in presence of Karsted catalyst. By the NMR 1H, 29Si, IR-spectroscopy and GPC methods the structure of the main chain and side groups was confirmed. By the DSC, optic microscopy, SAXS methods the phase behavior was investigated and chain-to-chain distance of stereoregular comb-shaped cyclolinear methylsiloxane copolymers was determined.