Accession Number : ADA316020

Title :   Epoxy Based Nonlinear Optical Polymers from Post Azo-Coupling Reaction.

Descriptive Note : Technical rept. 1 Jun 95-30 Sep 96,

Corporate Author : MASSACHUSETTS UNIV LOWELL DEPT OF CHEMISTRY

Personal Author(s) : Wang, X. ; Kumar, J. ; Tripathy, S. K. ; Li, L. ; Chen, J. -I.

PDF Url : ADA316020

Report Date : 18 SEP 1996

Pagination or Media Count : 35

Abstract : A series of novel second order nonlinear optical (NLO) polymers have been developed based on a precursor polymer prepared from the diglycikyl ether of Bisphenol A and aniline. The precursor polymer was post- functionalized by azo coupling reaction and tricyanovinylation to form a number of NLO polymers with different conjugation lengths and electron acceptors. Post azo coupling reaction enabled the introduction of chromophores and extension of the conjugation lengths of the chromophores to take place in a single step reaction. The chromophores introduced in the polymer system through covalent bonding not only define the NLO properties but also significantly modify other physical properties of the polymers. In this work, the correlation between chromophore structure and NLO polymer properties was extensively studied and the knowledge base was used to optimize polymer properties at the same time. The d33 value of 66 pm/V at 1.542 micrometers was determined for a representative polymer of the class containing tricyanovinyl azo chromophores. The NLO properties of these polymers exhibit long term stability at 80 C.

Descriptors :   *COUPLING(INTERACTION), *POLYMERS, *NONLINEAR OPTICS, *EPOXY COMPOUNDS, CHROMOPHORES, PHYSICAL PROPERTIES, PRECURSORS, COVALENT BONDS, CHEMICAL BONDS, ETHERS, ELECTRON ACCEPTORS, ANILINES.

Subject Categories : Polymer Chemistry
      Physical Chemistry
      Laminates and Composite Materials
      Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE