Biodegradation of γ Irradiated Poly 3-hydroxybutyrate (PHB) Films Blended with Poly(Ethyleneglycol)

Biodegradation of γ Irradiated Poly 3-hydroxybutyrate (PHB) Films Blended with Poly(Ethyleneglycol)

Poly(3-hydroxybutyrate) (PHB) was evaluated in blends with poly(ethyleneglycol) (PEG) of different weight average molecular weight (Mw = 300, 600, 1,000 and 6,000). Irradiation of the PHB/PEG films was carried out to different levels of irradiation doses (5 and 10 kGy) and the effects were investiga...

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Veröffentlicht in:Journal of polymers and the environment 2011-12, Vol.19 (4), p.918-925
Hauptverfasser: Parra, D. F., Rosa, D. S., Rezende, J., Ponce, P., Lugão, A. B.
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Chemistry
Chemistry and Materials Science
Environmental Chemistry
Environmental Engineering/Biotechnology
Industrial Chemistry/Chemical Engineering
Materials Science
Original Paper
Polymer Sciences
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container_end_page 925
container_issue 4
container_start_page 918
container_title Journal of polymers and the environment
container_volume 19
creator Parra, D. F.
Rosa, D. S.
Rezende, J.
Ponce, P.
Lugão, A. B.
description Poly(3-hydroxybutyrate) (PHB) was evaluated in blends with poly(ethyleneglycol) (PEG) of different weight average molecular weight (Mw = 300, 600, 1,000 and 6,000). Irradiation of the PHB/PEG films was carried out to different levels of irradiation doses (5 and 10 kGy) and the effects were investigated talking into consideration: thermal properties by differential scanning calorimetry (DSC), perforation resistance, water vapor transmission rate and biodegradation in simulated soil. The addition of plasticizer alters thermal stability and crystallinity of the blends. The improvement in perforation resistance due to irradiation was regarded to be a result of the crosslinking effect. Also, biodegradation assays resulted in mass retention improvements with increases in PEG molar masses, PEG concentration and irradiation dose. The irradiation process was shown to hamper the biodegradation mechanism.
doi_str_mv 10.1007/s10924-011-0353-x
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subjects Chemistry
Chemistry and Materials Science
Environmental Chemistry
Environmental Engineering/Biotechnology
Industrial Chemistry/Chemical Engineering
Materials Science
Original Paper
Polymer Sciences
title Biodegradation of γ Irradiated Poly 3-hydroxybutyrate (PHB) Films Blended with Poly(Ethyleneglycol)
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