Photooxidation of Polyphasic Ethylene-Propylene Polymers

  • Jean-Luc Gardette
  • Patrick Delprat

Abstract

The oxidation photoproducts resulting from the UV irradiation of a polyphasic polymer P-E/EPR in conditions of artificial accelerated exposure have been identified by different analytical methods. These methods included FTIR analysis of the polymeric matrix coupled with derivatization reactions. The identification of the low molecular weight photoproducts was carried out by chromatography and mass spectroscopy analysis. It was shown that the oxidation photoproducts were those of the polypropylene phase, which is by far the most oxidizable. Moreover our results showed unambiguously that the formation of the photoproducts was resulting from the oxidation of the tertiary carbon atom, which is consistent with the expected reactivities.

Keywords

Mass Spectroscopy Analysis Levulinic Acid Isotactic Polypropylene Derivatization Reaction Tertiary Carbon Atom 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    J.H. Adams, Analysis of the non volatile oxidation products of polypropylene. I. Thermal oxidation, J. Polym. Sci. A-l 8:1077 (1970).CrossRefGoogle Scholar
  2. 2.
    DJ. Carlsson, and D.M. Wiles, The photodegradation of polypropylene films, Macromolecules 2:597 (1969).CrossRefGoogle Scholar
  3. 3.
    J.M. Ginhac, J.L. Gardette, R. Arnaud, and J. Lemaire, Influence of hydroperoxides on the photothermal oxidation of polyethylene, Makromol. Chem. 182:1017 (1981).CrossRefGoogle Scholar
  4. 4.
    J. Lacoste, D. Vaillant, and D. Carlsson, Gamma-photo and thermally initiated oxidation of isotactic polypropylene, J. Polym. ScL, Polym. Chem. Ed 31:715 (1993).CrossRefGoogle Scholar
  5. 5.
    P. Delprat, X. Duteurtre, and J.L. Gardette, Photooxidation of unstabilized and HALS-stabilized polyphasic ethylene-propylene polymers, Polym. Deg. Stab. 50:1 (1995).CrossRefGoogle Scholar
  6. 6.
    R.P. Singh, R. Mani, S. Sivaram, J. Lacoste, and J. Lemaire, Thermooxidative degradation of heterophasic ethylene-propylene copolymers and their fractions, Polym. Int. 32:189 (1993).CrossRefGoogle Scholar
  7. 7.
    J.L. Philippart, F. Posada, and J.L. Gardette, Mass spectroscopy analysis of volatile photoproducts in photooxidation of polypropylene, Polym. Deg. Stab. 49:285 (1995).CrossRefGoogle Scholar
  8. 8.
    P. Delprat, and J.L. Gardette, Analysis of photooxidation of polymer materials by photoacoustic Fourier transform infrared spectroscopy, Polymer 34:933 (1993).CrossRefGoogle Scholar
  9. 9.
    P. Galli, T. Simonazzi, and D. Del Duca, New frontiers in polymer blends: the synthesis alloys, Acta Polym. 39:81 (1988).CrossRefGoogle Scholar
  10. 10.
    J. Lemaire, R. Arnaud, and J.L. Gardette, Le vieillissement des polymères. II. Principes d’étude du photovieillissement, Rev. Gen. Caoutch. Plast. 613:87 (1981).Google Scholar
  11. 11.
    X. Jouan, and J.L. Gardette, Development of a micro(FTIR) spectrometric method for characterization of heterogeneities in polymer films, Polymer 28:329 (1987).Google Scholar
  12. 12.
    D.J. Carlsson, R. Brousseau, C. Zhang, and D.M. Wiles, Identification of products from polyolefin oxidation by derivatization reactions, ACS Symp. Ser. 364:676 (1988).Google Scholar
  13. 13.
    W. Smith, The chemistry of sulfur tetrafluoride, Angew. Chem. Internation. Edit. 1:467 (1962).CrossRefGoogle Scholar
  14. 14.
    C. Wilhelm, and J.L. Gardette, Infrared identification of carboxylic acids formed in polymer photooxidation, J. Appl. Polym. Sci. 51:1411 (1994).CrossRefGoogle Scholar
  15. 15.
    J.L. Gardette, and J. Lemaire, Advantages and limits of hydroperoxide titration methods in solid polymers, J. Polymer Photochem. 7:409 (1986).CrossRefGoogle Scholar
  16. 16.
    J. Lacoste, and D.J. Carlsson, Gamma-, photo-and thermally-initiated oxidation of linear low density polyethylene: a quantitative comparison of oxidation products, J. Polym. Sci, Polym. Chem. 30:493 (1992).CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • Jean-Luc Gardette
    • 1
  • Patrick Delprat
    • 1
  1. 1.Laboratoire de Photochimie Moléculaire et Macromoléculaire, UMR CNRS 6505Université Blaise Pascal (Clermont-Fd)Aubière CedexFrance

Personalised recommendations