Zuev, Vjacheslav V.;
Smirnova, Galina S.;
Nikonorova, Natalja A.;
Borisova, Tamara I.;
Skorokhodov, Sergei S.
Chemical modification of polymer main chain — A new path to liquid‐crystalline polyesters with long siloxane segments. Significance of molecular mobility in the formation of the liquid‐crystalline state
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Media type:
E-Article
Title:
Chemical modification of polymer main chain — A new path to liquid‐crystalline polyesters with long siloxane segments. Significance of molecular mobility in the formation of the liquid‐crystalline state
Contributor:
Zuev, Vjacheslav V.;
Smirnova, Galina S.;
Nikonorova, Natalja A.;
Borisova, Tamara I.;
Skorokhodov, Sergei S.
Description:
<jats:title>Abstract</jats:title><jats:p>A new method for the synthesis of polymers incorporating dimethylsiloxane fragments of different length based on chemical modification of liquid‐crystalline poly[oxy(dimethylsilylene)‐methyleneoxycarbonyl‐1,4‐phenyleneoxyterephthaloyloxy‐1,4‐phenylenecarbonyloxymethylene‐(dimethylsilylene)] (polymer <jats:bold>1</jats:bold>) is described. A series of thermotropic LC polymers <jats:bold>2</jats:bold> with extended dimethylsiloxane segments (up to 10 Si atoms per siloxane spacer) was synthesized by means of the reaction of prepolymer <jats:bold>1</jats:bold> with octamethylcyclotetrasiloxane in the presence of a sulfocation exchanger. Investigation of the dielectric properties of the polyesters <jats:bold>2</jats:bold> revealed that there exists a relationship between the ability of the polymers to form a mesophase and their molecular mobility parameters.</jats:p>