Accession Number:

ADA229770

Title:

Molecular Engineering of Liquid Crystalline Polymers by Living Polymerization. 8. Influence of Molecular Weight on the Phase Behavior pf Poly(Omega-((4-cyano-4'Biphenyl)oxy)alkyl Vinyl Ether)s with Ethyl, Propyl and Butyl Alkyl Groups

Descriptive Note:

Technical rept.

Corporate Author:

CASE WESTERN RESERVE UNIV CLEVELAND OH DEPT OF MACROMOLECULAR SCIENCE

Personal Author(s):

Report Date:

1990-10-16

Pagination or Media Count:

31.0

Abstract:

Our investigations on the polymerization of mesogenic vinyl ethers are performed with the initiating system CF3SO3HCH32S which induces a living polymerization at 0C in methylene chloride. Presently, we are performing experiments which provide a complete understanding of the influence of molecular weight on the phase behavior of poly omega-4-cyano-4-biphenyloxyalkyl vinyl ether s with flexible spacers containing from two to eleven methylene units. This paper will describe our results on the influence of molecular weight on the behavior of poly 2-4-cyano-4-biphenyloxyethyl vinyl ether 6-2, poly 3-4- cyano-4-biphenyloxypropyl vinyl ether 6-3 and poly 4-4-cyano-4-biphenyl oxybutyl vinyl ether 6-4. Their phase behavior will be compared to that of the model compounds of their monomeric structural units. TTL

Subject Categories:

  • Organic Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE