Radiolytic stabilization of poly(hydroxybutyrate)

Stabilization against gamma irradiation effects on Brazilian poly(hydroxybutyrate) (PHB) films was investigated by using commercial additives. With the most effective additive the G value of main chain scissions decreased from 8.6 to 1.5 scissions/100 eV in the absorbed dose range up to 35 kGy. Irra...

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Bibliographic Details
Published in:Radiation physics and chemistry (Oxford, England : 1993) England : 1993), 2009-02, Vol.78 (2), p.85-91
Main Authors: Santos, Renata F.S., Araujo, Elmo S., Ferreira, Carlas R.C., Ribeiro, Abene S.
Format: Article
Language:English
Subjects:
Additives
Biodegradation
Gamma irradiation
NMR
PHB
Stabilization
X-ray diffraction
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Summary:Stabilization against gamma irradiation effects on Brazilian poly(hydroxybutyrate) (PHB) films was investigated by using commercial additives. With the most effective additive the G value of main chain scissions decreased from 8.6 to 1.5 scissions/100 eV in the absorbed dose range up to 35 kGy. Irradiation increased the biodegradability of the samples, whereas the additives-induced reduction in biodegradability. Irradiation treatment did not influence the degree of crystallinity. Protonic nuclear magnetic resonance (NMR- 1H) analysis revealed formation of hydroxyl-terminal groups upon irradiation.
ISSN:0969-806X
1879-0895
DOI:10.1016/j.radphyschem.2008.09.002