Effect of montmorillonite and chain extender on rheological, morphological and biodegradation behavior of PLA/PBAT blends
N/D
Tipo de produção
Artigo
Data de publicação
2017
Texto completo (DOI)
Periódico
Polymer Testing
Editor
Texto completo na Scopus
Citações na Scopus
74
Autores
Freitas A.L.P.D.L.
Tonini Filho L.R.
Calvao P.S.
Souza A.M.C.D.
Orientadores
Resumo
© 2017 Elsevier LtdThe 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/PBAT + CE blend presented the lowest amount of evolved CO2.
Citação
FREITAS, ANA LÚCIA PERRONE DE L.; TONINI FILHO, LUIZ ROBERTO; CALVÃO, PATRÍCIA SCHMID; SOUZA, ADRIANA M. CATELLI DE. Effect of montmorillonite and chain extender on rheological, morphological and biodegradation behavior of PLA/PBAT blends. POLYMER TESTING, v. 62, p. 189-195, 2017.
Palavras-chave
Keywords
Biodegradation; Chain extender; Montmorillonite clay; PLA/PBAT blends
Assuntos Scopus
Chain extenders; Complex viscosity; Crystallinities; Dispersed phase; Montmorillonite clay; Rheological property; Shear-thinning behavior; Soil burials