Accession Number:

ADA243634

Title:

Molecular Composites from Rod and FlexiblePolyquinolines

Descriptive Note:

Final rept. 1 Aug 86-31 Jul 90,

Corporate Author:

COLORADO STATE UNIV FORT COLLINS DEPT OF CHEMISTRY

Report Date:

1991-11-01

Pagination or Media Count:

51.0

Abstract:

The properties of blends of two polyquinolines and block copolymers of the same polymers have been studied as the basis for a molecular composite. The polyquinolines differ only in the presence or absence of an oxygen atom in the chain backbone. The chain conformation is found to be extended, with a persistence length of 20 nm without the oxygen linkage. The chain adopts a flexible conformation when the oxygen is present. Both forms, and their copolymer, were synthesized in this study. The results show that although the thermodynamically expected phase separation can be partially frustrated in the preparation of blends of the two polymers, the enhanced mobility at the elevated temperatures needed for processing the solid blend leads to substantial phase separation, with consequent deterioration of mechanical properties.

Subject Categories:

  • Polymer Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE