Cooperative Motion of Side Groups in Amorphous Polymers: Dipolar Interactions.

Abstract

Two ester-type monomers with different polarity, BEM and NBEM, copolymerize with the azo-containing monomer DR1M in random fashion and form amorphous copolymers. The polarity of BEM is comparable to the polarity of DR1M, and the electronic spectra confirm that BEM and DR1M interact with each other more strongly than NBEM and DR1M do. A nonlinear increase of the photoinduced birefringence as a function of azo content is found in DR1M copolymers with the polar BEM group, while the increase is linear in copolymers with the nonpolar NBEM group. Comparison between the two copolymer series suggests that the dipolar association between BEM and DR1M is the major factor causing cooperative motion in these amorphous copolymers enhancing the photoinduced birefringence. jg p.2

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Document Details

Document Type
Technical Report
Publication Date
Nov 06, 1995
Accession Number
ADA301932

Entities

People

  • Almeria L. Natansohn
  • Christopher L. Barrett
  • Paula A. Rochon
  • Xianghai Meng

Organizations

  • Queen's University

Tags

Communities of Interest

  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Absorption Spectra
  • Birefringence
  • Chemical Synthesis
  • Chemistry
  • Copolymers
  • Dipole Moments
  • Esters
  • Films
  • Military Research
  • National Security
  • Polarity
  • Polymeric Films
  • Polymers
  • Spectra
  • United States
  • United States Government
  • Universities

Readers

  • Polymer Science and Technology

Technology Areas

  • Microelectronics