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

Report Date:

1987-01-01

Pagination or Media Count:

17.0

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