Citation: Hassan Ebadi a, Shahram Mehdipour-Ataei b. HEAT-RESISTANT, PYRIDINE-BASED POLYAMIDES CONTAINING ETHER AND ESTER UNITS WITH IMPROVED SOLUBILITY[J]. Chinese Journal of Polymer Science, ;2010, 28(1): 29-37. shu

HEAT-RESISTANT, PYRIDINE-BASED POLYAMIDES CONTAINING ETHER AND ESTER UNITS WITH IMPROVED SOLUBILITY

Received Date: 4 November 2008
Revised Date: 24 December 2008

A diamine containing ether and ester units, as basic monomer for the preparation of polyamides, was prepared via three consecutive reactions. Nucleophilic substitution reaction of 1,4-dihydroxy benzene with 4-nitrobenzoyl chloride produced 4-hydroxyphenyl 4-nitrobenzoate (HPNB). Reduction of nitro groups to amino groups using Fe and HCl resulted in preparation of 4-hydroxyphenyl 4-aminobenzoate (HPAB). The diamine was synthesized through nucleophilic substitution reaction of HPAB with 2,6-dichloropyridine. The precursors and diamine were fully characterized by common methods, and the diamine was polycondensed with different diacid chlorides in the presence of an acid scavenger to prepare new polyamides. The polyamides were characterized, and their physical properties including thermal stability and behavior, inherent viscosity and solubility were studied.
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