Microwave-Induced Synthesis of Aromatic Polyamides by the Phosphorylation Reaction

Paula Carretero; Ricardo Sandin; Regis Mercier; Angel E. Lozano; Jose G. de la Campa; Javier de Abajo

doi:10.1071/CH08460

RESEARCH FRONT

Microwave-Induced Synthesis of Aromatic Polyamides by the Phosphorylation Reaction

Paula Carretero ^A , Ricardo Sandin ^A , Regis Mercier ^B , Angel E. Lozano ^A , Jose G. de la Campa ^A and Javier de Abajo ^A ^C

+ Author Affiliations

- Author Affiliations

^A Instituto de Ciencia y Tecnología de Polímeros, CSIC, 28006, Madrid, Spain.

^B Laboratoire de Matériaux Organiques à Propriétés Spécifiques (CNRS), UMR5041, 69360, Solaize, France.

^C Corresponding author. Email: deabajo@ictp.csic.es

Australian Journal of Chemistry 62(3) 250-253 https://doi.org/10.1071/CH08460
Submitted: 24 October 2008 Accepted: 27 February 2009 Published: 20 March 2009

Abstract

This paper reports an optimization of the Yamazaki–Higashi method of direct polyamidation from aromatic diacids and aromatic diamines. As a model reaction, the polycondensation between 4,4′-oxydianiline and isophthalic acid was studied in the presence of a phosphorylation agent and under microwave irradiation. This experimental study revealed that optimal results can be attained by using a great excess of pyridine as catalyst (pyridine-to-monomer ratio of 7), at moderate radiation intensity (200 W), and up to 25% (w/v) monomer concentration. Although the inherent viscosity achieved by microwave and by conventional heating was comparable, an exceptional reaction rate under microwave irradiation yielded a polyamide inherent viscosity of around 1 dL g^–1 in only a few minutes.

Acknowledgements

Financial support provided by the Spanish Ministerio de Ciencia e Innovación, project MAT2007-62392 is gratefully acknowledged. P. Carretero kindly acknowledges an I3P fellowship awarded by the Spanish Ministerio de Ciencia e Innovación.

References

Microwave-Induced Synthesis of Aromatic Polyamides by the Phosphorylation Reaction

Abstract

Acknowledgements

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