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| Synthesis and characterization of new polyesters based on 2,5-bis[(4-chloro carboxyanilino) carbonyl] pyridine and aromatic diols |
| Khalil Faghihi |
| Polymer Research Laboratory, Department of Chemistry, Faculty of Science, Islamic Azad University, Branch Arak, Arak, Iran |
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Abstract Six new polyesters 7a-f were synthesized through the solution polycondensation reaction of diacid chloride 5 with six aromatic diols 6a-f in N,N-dimethyl acetamide (DMAc) as solvent in the presence of pyridine as base. The polycondensation reaction produced a series of novel polyester containing pyridyl moiety in the main chain in high yields with inherent viscosities between 0.35 and 0.54 dL/g. The resulted polymers were fully characterized by means of FT-IR spectroscopy, elemental analyses, inherent viscosity and solubility tests. Thermal properties of these polymers were investigated by using thermal gravimetric analysis (TGA) and differentional thermal gravimetric (DTG). The glass-transition temperatures of these polyesters were recorded between 130 and 170℃ by differential scanning calorimetry (DSC) and the 10% weight loss temperatures were ranging from 390 to 450℃ under nitrogen.
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Received: 30 March 2009
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Corresponding Authors:
Khalil Faghihi,E-mail address:k-faghihi@araku.ac.ir.
E-mail: k-faghihi@araku.ac.ir.
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