The Influence of the Polymer Backbone Flexibility on the Phase Transitions of Side Chain Liquid Crystal Polymers Containing 6-(4-Methoxy-Beta-Metylstyryl) Phenoxy)Hexyl Side Groups

Abstract

The influence of the polymer backbone flexibility on the phase transition temperatures of side chain liquid crystalline polymethacrylate, polyacrylate, polymethylsiloxane, and polyphosphazene containing 6-(4-(4-methoxy-beta-methylstyryl)phenoxy)hexyl side groups is discussed. Flexible backbones enhance the decoupling of the motions of the side chain and main chain and, therefore, increase the rate of side-chain crystallization. Subsequently, the kinetically controlled crystallization process may transform the thermodynamically controlled mesomorphic phases from enantiotropic into monotropic. However, the highest degree of order in the mesophase is exhibited by the polymers based on the most rigid polymer backbone. Liquid crystal polymers, Backbone flexibility, Phenoxy compounds, Methacrylates.

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Document Details

Document Type
Technical Report
Publication Date
May 02, 1989
Accession Number
ADA208821

Entities

People

  • Dimitris Tomazos
  • Reginal A. Willingham
  • Virgil Percec

Organizations

  • Case Western Reserve University

Tags

DTIC Thesaurus Topics

  • Classification
  • Crystallization
  • Crystals
  • Governments
  • Liquid Crystal Polymers
  • Liquid Crystals
  • Macromolecules
  • Military Research
  • Molecular Weight
  • New York
  • Phase
  • Phase Transformations
  • Polymers
  • Security
  • Transition Temperature
  • Transitions
  • United States

Fields of Study

  • Chemistry
  • Materials science

Readers

  • Polymer Science and Technology