Synthesis and Characterization of Biphasic Liquid Crystalline Polysiloxanes Containing 4-Undecanyloxy-4'-Cyanobiphenyl Side-Groups.

Abstract

The synthesis and characteristization of liquid crystalline polysiloxanes and copolysiloxanes containing 4-undecdanyuloxy-4' cyanobiphenyl side groups is presented. The polysiloxane presents a single glass transition temperature followed by an SC and an SA mesophase. Copolysiloxanes presenting around 50% weight fraction of side groups exhibit two glass transition temperatures i.e., one due to the independent motion of the main chain and the other due to the cooperative but independent motion of the side groups, and in addition to the SC and SA phases exhibited by the homopolymer, present also side-chain crystallization.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1986
Accession Number
ADA183826

Entities

People

  • Chain S. Hsu
  • Virgil Percec

Organizations

  • Case Western Reserve University

Tags

DTIC Thesaurus Topics

  • Availability
  • Classification
  • Copolymers
  • Glass
  • Glass Transition Temperature
  • Heat Capacity
  • Heating
  • Low Temperature
  • Materials
  • Military Research
  • Phase
  • Polymers
  • Security
  • Spine
  • Transition Temperature
  • Transitions
  • United States Government

Fields of Study

  • Materials science

Readers

  • Polymer Science and Technology