Journal of Polymers and the Environment

, Volume 18, Issue 4, pp 600–607 | Cite as

Effect of γ-Dose rate on Biodegradation of γ-Sterilized Biomedical Polyolefins

  • Sameh A. S. AlariqiEmail author
  • R. P. Singh
Original Paper


The aim of the present study is to study the effect of γ-dose rate on the biodegradation of γ-sterilized polyolefins. Films of isotactic polypropylene, high density polyethylene and ethylene-propylene (EP) copolymer were sterilized under γ-radiation with doses of 10 and 25 kGy. Two different 60Co sources were used with dose rate 600 and 780 Gy h−1. Neat and sterilized samples were incubated in compost and fungal culture environments. The changes in functional groups, surface morphology and intrinsic viscosity in polymer chains were characterized by FT-IR spectroscopy, SEM and viscometric measurements, respectively. It was observed that both γ-degradation and biodegradation processes depend on the dose rate of γ-source. It was found that the biodegradation of γ-sterilized polyolefins in composting and microbial culture environments increased with decreasing the γ-dose rate.


Polyolefins Sterilization γ-Dose rate Biodegradation Composting and fungal culture 



The authors are grateful Dr. S. Sivaram, Director of National Chemical Laboratory, Pune, for his fruitful discussion and valuable suggestions for this work. Dr. Sameh AS Alariqi is grateful to University of Taiz for financial support.


  1. 1.
    Booth AF (1979) Sterilization of medical devices. Interpharm Press, Buffalo Grove, IllinoisGoogle Scholar
  2. 2.
    Tidjani A, Watanabe Y (1996) J Appl Polym 60:1839CrossRefGoogle Scholar
  3. 3.
    Scott G (1995) Degradable polymers principles and applications. Chapman and Hall, LondonGoogle Scholar
  4. 4.
    Pandey JK, Singh RP (2001) Biomacromolecules 2(3):880CrossRefGoogle Scholar
  5. 5.
    Singh RP, Pandey JK, Pratheepkumar A (2003) Macromol Symp 197:411CrossRefGoogle Scholar
  6. 6.
    Alariqi SAS, Pratheep Kumar, Rao BSM, Singh RP (2006) Polym Degrad Stab 91:1105CrossRefGoogle Scholar
  7. 7.
    Carlsson DJ, Chmela S (1983) Degradation and stabilization of polymers. Elsevier, AmsterdamGoogle Scholar
  8. 8.
    Alariqi SAS, Pratheep Kumar, Rao BSM, Singh RP (2009) Polym Degrad Stab 94:272CrossRefGoogle Scholar
  9. 9.
    Alariqi SAS, Rao BSM, Singh RP (2010) Arabian J Sci Eng (AJSE) (in press)Google Scholar
  10. 10.
    Gillen KT, Clough RL (1985) J Polym Sci Polym Chem Ed 23:2683CrossRefGoogle Scholar
  11. 11.
    Imai M, Gong Xu L, Ametani K, Tutiya M (1989) J Polym Sci Part A Polym Chem 27:1763CrossRefGoogle Scholar
  12. 12.
    Mani R (1994) A study of thermal and photodegradation of polyolefins. Ph.D. Thesis, University of Pune, IndiaGoogle Scholar
  13. 13.
    Eldsater C, Karlsson S, Albertsson AC (1999) Polym Degrad Stab 64:177CrossRefGoogle Scholar
  14. 14.
    Carlsson DJ, Chemela S, Lacoste J (1990) Macromol 23(23):4934CrossRefGoogle Scholar
  15. 15.
    Costa L, Luda MP, Trossarelli L, Brach del Prever EM, Crova M, Gallinavo P (1998) Biomaterials 19(7–9):659CrossRefGoogle Scholar
  16. 16.
    Grima S, Bellon-Maurel V, Feuilloley P, Silvestre F (2000) J Polym Environ 8(4):195CrossRefGoogle Scholar
  17. 17.
    Colak Afri M (2004) J Biotechnol 3(9):456Google Scholar
  18. 18.
    ASTM Method G2170 (1984a) Standard practice for determining resistance of synthetic polymer materials to fungi.

Copyright information

© Springer Science+Business Media, LLC 2010

Authors and Affiliations

  1. 1.Department of Chemistry, Faculty of Applied ScienceUniversity of TaizTaizYemen
  2. 2.Division of Polymer Science and EngineeringNational Chemical LaboratoryPuneIndia

Personalised recommendations