Accession Number : ADA194194

Title :   Case Western Reserve University Final Report on Contract N00014-86-K-0480,

Corporate Author : CASE WESTERN RESERVE UNIV CLEVELAND OH DEPT OF MACROMOLECULAR SCIENCE

Personal Author(s) : Lando, Jerome B ; Rickert, Scott E

PDF Url : ADA194194

Report Date : 10 Feb 1988

Pagination or Media Count : 13

Abstract : I we have worked on nitrile terminated aliphatic diacetylene dimers. This study was initially focused on the diacetylenic dimer of undeynonitrile: HC=C)CH2)8C(triple bond)N (in order to save space and time, the shorthand notation 8 nitrile dimer was adopted. The 8 nitrile dimer is the nitrile analog to the dimer of 1,11-dodecadiyne which was shown to undergo a topochemical crosspolymerization reaction to yield a semiconducting organic polymer. In order to overcome some difficulties in obtaining large single crystals, we began to investigate the polar nitrile terminator which may undergo solid state polymerization. II. Work has primarily involved and characterization of the previously synthesized a,w-alkyldiyne dimers and their respective solid state polymerized polymers. Dimers of the structure HC=C(CH2)(n)C=C-2 where n=3,4,5,6,7,8 were synthesized via a controlled Glaser oxidative coupling and subsequent high vacuum fractional distillation. There poly(alkyldiyne) macromonomers have been synthesized and characterized: poly(1,6-heptadiyne) (P16H0, poly(1,8-nonadiyne) (p18N), and poly(1,11-dodecadiyne) (P111D). Thermochromic and solvatochromic transitions have been discovered and characterized in the crosspolymerized forms of these systems.

Descriptors :   *NITRILES, *DIMERS, *SINGLE CRYSTALS, POLYMERIZATION, POLYMERS, RESPONSE, SEMICONDUCTORS, YIELD

Subject Categories : Organic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE