Date of Award

12-1-1988

Degree Type

Thesis

University or Center

Atlanta University (AU)

Degree Name

M.S.

Department

Chemistry

First Advisor

Professor Malcolm B. Polk

Abstract

Four random copolyesters were synthesized by the polycondensation technique. The first copolymer, poly[oxy(2-bromo-l,4-phenylene)oxyterephthaloyl- co-oxy(2,2'-biphenylene)oxyterephthaloyl], PU1, was made by polyesterification of o,o'-biphenol, bromohydroquinone and tere phthaloyl chloride in a molar ratio of 2:1:3. Bromohydroquinone was substituted by phenylhydroquinone in the preparation of PU2. All other conditions remained the same. No remarkable differences were found between PU1 and PU2 in thermal properties.

PU3 and PU4 followed similar synthetic routes. In the synthesis of PU3, bromohydroquinone, terephthaloyl chloride, and 1,4-phenylenediacetyl chloride were reacted in a molar ratio of 2:1:1. Chlorosubstituted hydroquinone was used in the making of PU4. The polymers were characterized by IR and NMR spectroscopy, solubility, DSC, optical polarizing microscopy, GPC and viscometry.

Included in

Chemistry Commons

Share

COinS