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Paper Information

Journal:   JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY)   SUMMER 2006 , Volume 16 , Number 60 (CHEMISTRY ISSUE); Page(s) 12 To 19.
 
Paper: 

SYNTHESIS AND CHARACTERIZATION OF NEW POLYESTERS CONTAINING AZOBENZENE UNITES AND AROMATIC DIOLS IN MAIN CHAIN

 
 
Author(s):  FAGHIHI KH.*, YAZDI ALI
 
* ORGANIC POLYMER CHEMISTRY RESEARCH LABORATORY, CHEMISTRY DEPARTMENT, FACULTY OF SCIENCE, ARAK UNIVERSITY, ARAK, 38156, IRAN
 
Abstract: 

4-Nitrobenzoic acid 1 was reacted with glucose in the presence of sodium hydroxide at 50oC and 4,4' -azodibenzoic acid 2 was obtained in quantitative yield.
Then 4,4' -azodibenzoic acid 2 was converted to 4,4' -azodibenzoyl chloride 3 by reaction with thionyl chloride. Solution polycondensation of this diacid chloride 3 with hydroquinone 4a, 2,7- dihydroxy naphtalene 4b, 4,4'- dihydroxy diphenyl sulfone 4c, bisphenol A 4d, 1,4- dihydroxy antraquinone 4e and phenol phethalein 4f was carried out u in DMAc solvent and in the presence of pyridine as a base. The polycondensation reaction producing a series of new polyesters 5a-f in high yield, and inherent viscosity between 0.20-0.47 dL/g. The resulting polyesters were characterized by elemental analysis, viscosity measurements, thermal gravimetric analysis (TGA and DTG), solubility test and FT-IR spectroscopy. All of the polymers were soluble at room temperature in polar solvents such as N, N- dimethylacetamide (DMAc), N, N- dimethylformamide (DMF), dimethylsulfoxide (DMSO), tetrahydrofurane (THF) and N-methyl-2-pyrrolidone (NMP).

 
Keyword(s): 4,4' -AZODIBENZOYL CHLORIDE, AROMATIC DIOLS, AZOBENZENE MOIETIES, SOLUTION POLYCONDENSATION, INHERENT VISCOSITY
 
References: 
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