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The synthesis and characterization of thermotropic liquid crystalline copolyesters

The synthesis of polyesters and copolyesters containing the bicycl o[2. 2.2]octane ring and 1,4-cycl ohexanedi acetic acid and 1,4-cyclohexanedimethanol spacers are discussed. The following homopolyesters were synthesized: poly[oxy(2-methyll, 4-phenylene)oxycarbonyl-l,4-bicyclo[2.2.2]octylenecarbonyl] I; and poly[oxy(2-chloro-l,4-phenylene)oxycarbonyl-l,4-bicyclo[2.2.2]octy-1 enecarbonyl] II. The following copolyesters were synthesized: poly[oxy (2-chl oro- 1,4-phenyl ene )oxycarbonyl-l ,4-bi cycl o[2. 2. 2]octyl enecarbonyl-co-oxy- (2-chloro-1,4-phenylene)oxysebacoyl] III; poly[oxy(2-methyl-l,4- phenylene)oxycarbonyl-l,4-bicyclo[2.2.2]octylene-co-oxy(2-methyl-l,4- phenyl ene)oxysebacoyl] IV; poly[oxy(2-methyl-l,4-phenylene)oxyterephthaloyl- co-oxy(2-methyl-l,4-phenylene)oxy-l,4-cyclohexanediacetoyl] V; poly[oxy(2-methyl-1,4-phenylene)oxyterephthaloyl-co-oxymethylene-1,4 cyclohexylenemethyleneoxyterephthaloyl] VI; and poly[oxy(2-chloro-1,4 phenylene)oxyterephthaloyl-co-oxymethylene-1,4 cyclohexylenemethyleneoxyterephthaloyl]VII. The resulting homopolyesters and copolyesters were characterized by proton NMR, DSC, TGA, IR, solution viscosity, and polarizing optical microscopy.

Identiferoai:union.ndltd.org:auctr.edu/oai:digitalcommons.auctr.edu:dissertations-4787
Date01 July 1985
CreatorsOnwumere, Fidelis C.
PublisherDigitalCommons@Robert W. Woodruff Library, Atlanta University Center
Source SetsAtlanta University Center
Detected LanguageEnglish
Typetext
Formatapplication/pdf
SourceETD Collection for AUC Robert W. Woodruff Library

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