期刊
POLYMER TESTING
卷 62, 期 -, 页码 189-195出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymertesting.2017.06.030
关键词
PLA/PBAT blends; Biodegradation; Chain extender; Montmorillonite clay
资金
- CAPES
- FEI [PBIC 128/14]
The effect of montmorillonite clay (MMT) and/or chain extender (CE) on rheological, morphological and biodegradation properties of PLA/PBAT blend was investigated. The biodegradation behavior was evaluated by CO2 evolution in soil burial. CE incorporation resulted in an increase in the complex viscosity of PLA/PBAT-blends, an increase in PIA crystallinity and a decrease in the dispersed phase diameter. MMT incorporation resulted in an increase in the complex viscosity, more pronounced shear-thinning behavior and a decrease in the dispersed phase diameter. CE incorporation resulted in a slight effect in the Theological properties of PLA/PBAT blend in the presence of MMT. Unfilled PLA/PBAT blend presented the highest amount of evolved CO2, and the micrographs indicated that degradation tends to occur on the surface. MMT delayed biodegradation of PLA/PBAT blends even although their surfaces presented some cracks and holes in a few localized regions. PLA/PBAT CE blend presented the lowest amount of evolved CO2. (C) 2017 Elsevier Ltd. All rights reserved.
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