Biodegradation of γ Irradiated Poly 3-hydroxybutyrate (PHB) Films Blended with Poly(Ethyleneglycol) |
| |
Authors: | D F Parra D S Rosa J Rezende P Ponce A B Lugão |
| |
Institution: | 1.Chemical and Environmental Center (CQMA),Nuclear and Energetic Research Institute (IPEN),S?o Paulo,Brazil;2.ABC Federal University,Santo André,Brazil |
| |
Abstract: | 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. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|