Accession Number : ADA183732

Title :   Liquid Crystalline Polymers Containing Heterocycloalkane Mesogens, Biphasic Side-Chain Liquid Crystalline Polysiloxanes Containing Trans 5-n-undecanyl-2-(4-cyanophenyl)-1,3-Dioxane Side Groups.

Descriptive Note : Technical rept.,

Corporate Author : CASE WESTERN RESERVE UNIV CLEVELAND OH DEPT OF MACROMOLECULAR SCIENCE

Personal Author(s) : Hsu,Chain S ; Percec,Virgil

PDF Url : ADA183732

Report Date : Jan 1987

Pagination or Media Count : 17

Abstract : Polysiloxanes and copolysiloxanes containing the trans 5-(n-undecanyl)-2-(4-cyanophenyl)-1,3-dioxane side group as mesogen were synthesized. Their phase behavior was studied by differential scanning calorimetry and optical polarization microscopy. Homopolymers containing the mesogen and a copolymer containing 33% of the mesogen showed smectic mesomorphism. The copolymers containing the mesogen showed two well defined Tg and thus present strong evidence for a phase separated morphology.

Descriptors :   *POLYMERS, *LIQUID CRYSTALS, *SILOXANES, *PHASE STUDIES, CALORIMETRY, COPOLYMERS, LIQUID CRYSTALS, MICROSCOPY, MORPHOLOGY, OPTICAL ANALYSIS, PHASE STUDIES, POLARIZATION, POLYMERS, SCANNING, SEPARATION, SILOXANES, SYNTHESIS(CHEMISTRY), DIOXANES, PHASE SHIFT, TRANSITION TEMPERATURE, HETEROCYCLIC COMPOUNDS, ALKANES

Subject Categories : Polymer Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE