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Rheological behavior and morphological and interfacial properties of PLA/TPE blends
Author(s) -
Bernardes Giordano Pierozan,
Rosa Luiz Nathália,
Santana Ruth Marlene Campomanes,
Camargo Forte Maria Madalena
Publication year - 2019
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.47962
Subject(s) - materials science , thermoplastic polyurethane , composite material , izod impact strength test , thermal stability , elastomer , extrusion , thermoplastic elastomer , glycidyl methacrylate , rheology , scanning electron microscope , methyl methacrylate , compatibilization , polymer blend , copolymer , chemical engineering , polymer , ultimate tensile strength , engineering
Rheological and interfacial tension data were employed to predict the morphology and thermal and mechanical properties of noncompatibilized and compatibilized poly(lactic acid) (PLA)/thermoplastic elastomer (TPE) blends. PLA was melt blended with thermoplastic polyurethane (TPU) and ethylene elastomer (EE) and compatibilized by ethylene–butyl acrylate–glycidyl methacrylate (EBG) in an internal mixer chamber. Both TPU and EE TPEs have higher viscosities than PLA, and the interfacial properties evaluated have revealed better adhesion between domains of PLA–TPU. The efficiency of the compatibilizer agent EBG depended on the TPE type inferred by modifications in the scanning electron microscopy images of PLA/TPE blends and by the Izod impact strength (improved by 23%). The EBG was more effective in the PLA/TPU blend. The TPEs and EBG did not affect the PLA thermal stability, and no thermal event was observed in the usual PLA extrusion and injection temperature range. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47962.