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Chinese Journal of Polymer Science

, Volume 30, Issue 1, pp 112–121 | Cite as

Polyamides with pendant 1,3,4-oxadiazole and pyridine moieties

  • Yagoub MansooriEmail author
  • Behzad Koohi-Zargar
  • Hemayat Shekaari
  • Mohammad Reza Zamanloo
  • Gholam Hassan Imanzadeh
Article

Abstract

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. Thermophysical 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 25°C) 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.

Keywords

Polyamide 1,3,4-Oxadiazole Inherent viscosity Vapor phase osmometry Polycondensation 

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Copyright information

© Chinese Chemical Society, Institute of Chemistry, Chinese Academy of Sciences and Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Yagoub Mansoori
    • 1
    Email author
  • Behzad Koohi-Zargar
    • 1
  • Hemayat Shekaari
    • 1
  • Mohammad Reza Zamanloo
    • 1
  • Gholam Hassan Imanzadeh
    • 1
  1. 1.Department of Applied Chemistry, College of ScienceUniversity of Mohaghegh ArdabiliArdabilIran

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