Synthesis and Mesomorphic Behavior of Poly((2S, 3S)-(+)-2-Chloro-3- Methylpentyl 4'-(Omega-Vinyloxyalkyloxy)biphenyl-4-Carboxylate)s with Ethyl and Propyl Alkyl Groups

Abstract

The synthesis and cationic polymerization of (2S, 3S)-(+)-2-chloro-3- methylpentyl 4'-(2-vinyloxyethyloxy)biphenyl-4-carboxylate (15-2) and (2S, 3S)- (+)-2-chloro-3-methylpentyl 4'-(3-vinyloxyethyloxy)biphenyl-4-carboylate (15-3) are described. The mesogenic behavior of the resulting polymers is discussed as a function of the molecular weight and spacer length. Based on the second and subsequent heating and cooling scans, poly(15-2)s exhibit an enantiotropic S(x) (unidentified smectic) phase. Poly (15-3)s show an enantiotropic cholesteric phase and an inverse monotropic S(x) phase.

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Document Details

Document Type
Technical Report
Publication Date
Jun 30, 1994
Accession Number
ADA281402

Entities

People

  • Q. Zheng
  • Virgil Percec

Organizations

  • Case Western Reserve University

Tags

Communities of Interest

  • C4I

DTIC Thesaurus Topics

  • Abstracts
  • Alkenes
  • Biphenyl
  • Chromatography
  • Column Chromatography
  • Detectors
  • Glass Transition Temperature
  • Liquid Chromatography
  • Measurement
  • Military Research
  • Molecular Weight
  • Phase
  • Phase Transformations
  • Polymerization
  • Polymers
  • Transition Temperature
  • Transitions

Fields of Study

  • Chemistry

Readers

  • Polymer Science and Technology