Citation: Yagoub Mansoori, Behzad Koohi-Zargar, Hemayat Shekaari, Mohammad Reza Zamanloo, Gholam HassanImanzadeh. POLYAMIDES WITH PENDANT 1,3,4-OXADIAZOLE AND PYRIDINE MOIETIES[J]. Chinese Journal of Polymer Science, ;2012, 30(1): 112-121. doi: 10.1007/s10118-012-1092-8 shu

POLYAMIDES WITH PENDANT 1,3,4-OXADIAZOLE AND PYRIDINE MOIETIES

Received Date: 14 February 2011
Revised Date: 24 March 2011

Fund Project: This work was financially supported by the Graduate Council of the University of Mohaghegh Ardabili (Iran).

A novel aromatic diamine, 2-(5-(3,5-diaminophenyl)-1,3,4-oxadiazole-2-yl)pyridine (POBD), containing a pyridine ring and a 1,3,4-oxadiazole moiety, was synthesized. It was used in a polycondensation with various aromatic and aliphatic diacid chlorides to generate a series of new aromatic polyamides with pendant 1,3,4-oxadiazole groups. The prepared polyamides were characterized by IR, elemental analysis and through the synthesis of model compounds. Thermo-physical properties of the synthesized polyamides have been studied by DSC, TGA and inherent viscosity measurements. Relatively high inherent viscosity values (0.76-1.62 dL/g, in 0.125% H2SO4 at 25C) were observed for these compounds. Number average molecular weight (Mn) of the polymers was measured by vapor phase osmometry (VPO). The introduction of bulky side chains in the structure of aromatic polyamides led to increased solubility of these polymers in common polar and aprotic solvents, such as DMF, DMSO, NMP and DMAc, which allowed thin films to be cast from polymer solutions. The highest molecular weight (Mn = 51190) was observed for polymer (IX), which was prepared from pyridine-2,6-dichlorocarbonyl.
- Polyamide,
- 1,3,4-Oxadiazole,
- Inherent viscosity,
- Vapor phase osmometry,
- Polycondensation
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