Functional Polymers and Sequential Copolymers by Phase Transfer Catalysis. Synthesis of Thermotropic Side-Chain Liquid Crystalline Polymers Containing a Poly(2,6-Dimethyl-1,4-Phenylene Oxide) Main Chain.

Abstract

Poly(2,6-dimethyl-1,4-phenylene oxide (PPO) containing pendant mesogenic units separated from the polymer main-chain through spacers of three to ten methylene units were synthesized and characterized. The synthetic pathway used for the chemical modification of PPO involved the radical bromination of its methyl groups followed by phase transfer catalyzed esterification of the resulting bromobenzyl groups with potassium omega-(4-oxybiphenyl)alkanoates and potassium omega-(4-methoxy-4'-oxybiphenyl)-alkanoates. Only the resulting polymers containing ten methylene units as spacer and 4,4'-methoxybiphenyl as mesogen present thermotropic liquid crystalline mesomorphism. Keywords: Side-chain thermotropic liquid crystalline polymers.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1986
Accession Number
ADA175086

Entities

People

  • Coleen Pugh
  • Virgil Percec

Organizations

  • Case Western Reserve University

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Alcohols
  • Butyrates
  • Classification
  • Elements
  • Glass Transition Temperature
  • Governments
  • Hydroxides
  • Methanols
  • Methylenes
  • Military Research
  • Phase
  • Polymers
  • Potassium
  • Security
  • Sodium Hydroxide
  • Transition Temperature

Fields of Study

  • Chemistry

Readers

  • Polymer Science and Technology

Technology Areas

  • Microelectronics