| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 5205380 | Polymer Testing | 2017 | 7 Pages |
Abstract
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 PLA 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 rheological 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/PBATÂ +Â CE blend presented the lowest amount of evolved CO2.
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Physical Sciences and Engineering
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Authors
Ana Lúcia Perrone de L. Freitas, Luiz Roberto Tonini Filho, PatrÃcia Schmid Calvão, Adriana M. Catelli de Souza,