Accession Number:

ADA281374

Title:

Smart Materials Based Upon Oligomeric Molecules

Descriptive Note:

Final technical rept. 15 Mar 1991-14 Mar 1994

Corporate Author:

AKRON UNIV OH INST OF POLYMER SCIENCE

Report Date:

1994-06-01

Pagination or Media Count:

12.0

Abstract:

Macromolecular smart materials and structures were designed and characterized. The designs were based on oligomeric modules, each of which is responsible for a particular function in the smart material, or in the structure of which it is a part. Liquid crystals and block copolymers were also characterized for potential use as modules. Computer modeling of molecular architecture and motion was used to identify oligomers that can provide useful functions in a smart molecule system. Networks of oligomers, polymers, and block copolymers with well defined structures were identified and synthesized. Functional groups at specific locations were used to create the networks. Molecular scale assemblies were attached to mica or graphite and observed by atomic force microscopy or scanning tunneling microscopy. Rubbery networks containing strain sensitive chromophores were characterized by optical spectroscopy. Functions performed by the various oligomers that were examined include attachment of the oligomer to a graphite or mica surface, incorporation of a chromophore into an elastomeric network, piezochromic effects, formation of bonds that can be broken predictably by forces that do not break the backbone chain, and maintenance of a force transmitting connection between a reinforcing fiber and the polymer matrix in the presence of high strain. Smart materials, Oligomeric molecules, Liquid crystals, Computer modeling, Oligomers, Macromolecular smart materials, Rubbery networks, Elastic networks

Subject Categories:

  • Polymer Chemistry
  • Laminates and Composite Materials
  • Crystallography
  • Atomic and Molecular Physics and Spectroscopy

Distribution Statement:

APPROVED FOR PUBLIC RELEASE