Synthesis of a Bio-based and Biodegradable Poly(ethylene-co-isosorbide [2,2′-bithiophene]-5,5′-dicarboxylate) with Enhanced Thermal and Degradability Properties

Lesly Dasilva Wandji Djouonkep and Naomie Beolle Songwe Selabi
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Lesly Dasilva Wandji Djouonkep: Department of Petroleum Engineering, Applied Chemistry in Oil and Gas fields, Yangtze University, Wuhan, 43010, China; Institute of fine organic chemistry and new organic materials, Wuhan University of Science and Technology, Wuhan, 430081, China;
Naomie Beolle Songwe Selabi: Institute of advanced materials and Nanotechnology, Wuhan University of Science and Technology, Wuhan, 430081, China;

International Journal of Research and Scientific Innovation, 2021, vol. 8, issue 10, 01-08

Abstract: A synthetic biopolymer was prepared from bithiophene (C8H6S2) monomer, isosorbide (C6H10O4) and ethylene glycol (C2H6O2) was synthesized via melt polycondensation process. The results show that the polyester has good thermal and mechanical properties. The bithiophene monomer (2,2′-dithiophene)-5,5′-dicarboxylic acid was prepared by direct coupling of combined phosphine-free palladium ligand with polyethylene glycol palladium (Pd/PEG) as catalyst. This method can effectively polymerize bithiophene monomer with isosorbide and ethylene glycol. The series of polyesters display good heat resistance, crystallinity and high-tensile modulus. In addition, the bithiophene monomer coupled with isosorbide units increased the glass transition temperature of the polyesters. These polyester films exhibit excellent oxygen/water barrier properties, which are interestingly superior to those of polyethylene terephthalates, and has a significant degradation in soil degradation under the influence of microorganisms.

Date: 2021
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