Synthesis of Side Chain Liquid Crystal Polymers by Living Ring Opening Metathesis Polymerization. 3. Influence of Molecular Weight, Interconnecting Unit and Substituent on the Mesomorphic behavior of Polymers with Laterally Attached Mesogens

Abstract

Norbornene derivatives containing laterally attached 2,5-bis(4'-n- alkoxybenzoyl OXY) mesogens were polymerized by controlled ring opening metathesis polymerization to provide polymers in high yield with 5-100 repeat units and narrow molecular weight distributions. Monomers with n>l displayed monotropic or enantiotropic nematic mesophases. All polymers displayed enantiotropic nematic mesophases regardless of the spacer, molecular weight or length or the n-alkoxy substituent. Constitutional isomers of poly(5-carbo(2', 5'-bis-4( methoxybenzoyloxy)benzyloxy)bicyclo(2.2.1)hep t-2-ene)s containing laterally attached mixed phenylester/benzylester units are amorphous. Side chain liquid crystal polymers (SCLCPs), living ring opening metathesis polymerization.

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Document Details

Document Type
Technical Report
Publication Date
Apr 08, 1992
Accession Number
ADA248698

Entities

People

  • Coleen Pugh
  • Richard R. Schrock

Organizations

  • Massachusetts Institute of Technology

Tags

Communities of Interest

  • Weapons Technologies

DTIC Thesaurus Topics

  • Alcohols
  • Alkenes
  • Chemical Synthesis
  • Chemistry
  • Crystals
  • Glass Transition Temperature
  • Liquid Crystal Polymers
  • Liquid Crystals
  • Military Research
  • Molecular Weight
  • Organic Chemistry
  • Phase Transformations
  • Polymeric Films
  • Polymers
  • Standards
  • Structural Isomers
  • Transition Temperature

Fields of Study

  • Chemistry

Readers

  • Polymer Science and Technology