Second-Generation Ordered Polymers
Abstract
The goals of this research were (1) to understand the structure- property relationships that lead to organic materials with high figures of merit for nonlinear optical (NLO) applications and to develop the processibility and optical utility of such materials, (2) to investigate the effects of temperature and shear on the polymerization kinetics of lyotropic polymers, and (3) to examine the dilute and concentrated solution properties of rigid rod and extended chain poly(benzazoles). During this contract, we synthesized a homologous series of benzazole-containing donor-acceptor compounds that should exhibit high figures of merit in NLO applications. These compounds, called ALHD compounds, are composed of an electron-accepting group, an unsaturated linking group, a conjugated heterocyclic segment, and an electron-donating group E.G., 2-(4-N,N-dimethylaminophenyl)-6-(N-nitrophenylmine) benzoxazole). The reaction kinetics and solution properties of lyotropic poly(benzazoles) have also been investigated. The study of dilute and concentrated solutions of poly(2,6- benzothiazole), or ABPBT, and poly(2,5-benzoxazole), or ABPBO, involved the use of viscometry and low angle light scattering. These polymers can be classified as intrinsically semirigid, with persistence lengths of 130 A for ABPBT and 90 A for ABPBO.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1989
- Accession Number
- ADA216126
Entities
People
- Andrea W. Chow
- Bock H. Loo
- James F. Wolfe
- Janet F. Sandell
- Paul E. Penwell
- Richard D. Hamlin
- Steven P. Bitler
Organizations
- SRI International