Article

Organic Phosphites as Polymer Stabilizers

  1. Wolf D. Habicher1,
  2. Ingmar Bauer1,
  3. Jan Pospíšil2

Article first published online: 2 JUN 2005

DOI: 10.1002/masy.200550712

Issue

Macromolecular Symposia

Macromolecular Symposia

Special Issue: Polymers in Novel Applications

Volume 225, Issue 1, pages 147–164, May 2005

Additional Information

How to Cite

Habicher, W. D., Bauer, I. and Pospíšil, J. (2005), Organic Phosphites as Polymer Stabilizers. Macromol. Symp., 225: 147–164. doi: 10.1002/masy.200550712

Author Information

  1. 1

    Dresden University of Technology, Institute of Organic Chemistry, Mommsenstr. 13, D-01062 Dresden, Germany, Fax: (+49) 351 463 34093

  2. 2

    Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, Heyrovsky Sq 2, 162 06 Prague 6, Czech Republic

Publication History

  1. Issue published online: 2 JUN 2005
  2. Article first published online: 2 JUN 2005

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Keywords:

  • degradation;
  • stabilization

Abstract

The antioxidative action of phosphonites and phosphites depends on their structure, the nature of the polymer to be stabilized and the aging conditions. Phosphorus compounds can act in different ways: as hydroperoxide decomposers (secondary antioxidants), as free-radical scavengers (primary antioxidants), as well as metal-complex forming agents. The stabilizing action of phosphites and phosphonites is due to three basic mechanisms: oxidation by hydroperoxides, substitution by alkoxyl radicals and hydrolysis to acidic phosphorus compounds and phenols. Modification of phosphites with additional functional groups such as hindered amine moieties leads to new stabilizing properties. An intramolecular synergistic effect is observed.

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