Syntheses and Characterization of Polycarbonates Based on 1,1′-dihydroxyethyl-2,2′-biimidazole

Author

Harvest L. Collier, Missouri University of Science and TechnologyFollow
Il Young Cho

Abstract

Polycarbonates containing 2,2′-biimidazole were synthesized by the transesterification reaction of 1.1′-dihydroxyethyle-2,2′-biimidazole (HEB) and diphenyl carbonate (DPC). The experimental conditions for polymerization were also investigated in terms of the catalyst types. such as NaOMe and TiCl4. The maximum number average molecular weight (Mn=24.800) of polymer was attained in case of equimolar ratio of HEB to DPC with 0.2% TiCl4 as a catalyst and DMSO as solvent. When MaOMe was used as a catalyst, there was no significant difference in the molecular weight (13,000) compared with no catalyst case (10,900). FTIR and NMR spectal characterizations showed that the isolated polymer exhibited a linear structure with regular incorporation of 2,2′-biimidazole units. The polymer decomposition was less than 9% at 200°C in air.

Recommended Citation

H. L. Collier and I. Y. Cho, "Syntheses and Characterization of Polycarbonates Based on 1,1′-dihydroxyethyl-2,2′-biimidazole," Korea Polymer Journal, The Polymer Society of Korea, Jan 1997.

Department(s)

Chemistry

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 1997 The Polymer Society of Korea, All rights reserved.

Publication Date

01 Jan 1997