Tailoring PLA/ABS Blends Compatibilized with SEBS-g-MA through Annealing Heat Treatment

Tailoring PLA/ABS Blends Compatibilized with SEBS-g-MA through Annealing Heat Treatment

In this work, blends based on poly (lactic acid) (PLA)/acrylonitrile-butadiene-styrene (ABS) compatibilized with maleic anhydride-grafted (SEBS-g-MA) were prepared in a co-rotational twin-screw extruder by varying the concentrations of the compatibilizing agent. The influence of the compatibilizing...

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Bibliographic Details
Published in:Polymers Vol. 15; no. 16; p. 3434
Main Authors: Costa, Anna Raffaela de Matos, Luna, Carlos Bruno Barreto, do Nascimento, Emanuel Pereira, Ferreira, Eduardo da Silva Barbosa, Costa, Claudia de Matos, de Almeida, Yeda Medeiros Bastos, Araújo, Edcleide Maria
Format: Journal Article
Language:English
Published: Basel MDPI AG 01-08-2023
MDPI
Subjects:
ABS resins
Acrylonitrile
Acrylonitrile butadiene styrene
Annealing
Butadiene
Compatibility
Compatibilizers
compatibilizing
Crystallization
Diffraction
Filaments
Hardness
Heat resistance
Heat treatment
Impact strength
Injection molding
Maleic anhydride
Mechanical properties
Modulus of elasticity
Morphology
poly (lactic acid)
Polylactic acid
Polymer blends
Polymers
Rheological properties
Rheology
SEBS-g-MA
Tensile strength
Thermal stability
Thermomechanical properties
Three dimensional printing
Twin screw extruders
Viscosity
X-rays
Brazil
Massachusetts
United States > US
Germany
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Summary:In this work, blends based on poly (lactic acid) (PLA)/acrylonitrile-butadiene-styrene (ABS) compatibilized with maleic anhydride-grafted (SEBS-g-MA) were prepared in a co-rotational twin-screw extruder by varying the concentrations of the compatibilizing agent. The influence of the compatibilizing agent on the morphology, mechanical, thermal, thermomechanical, and rheological properties of the prepared materials was analyzed. The effect of annealing on the properties of the blends was also investigated using injection-molded samples. The X-ray diffraction (XRD) results proved that the increments in crystallinity were an effect of annealing in the PLA/ABS/SEBS-g-MA blends, resonating at higher heat deflection temperatures (HDTs). The impact strength of the PLA/ABS blends compatibilized with 10 wt% SEBS-g-MA was significantly increased when compared to the PLA/ABS blends. However, the hardness and elastic modulus of the blends decreased when compared to neat PLA. The refined morphology shown in the scanning electron microscopy (SEM) analyses corroborated the improved impact strength promoted by SEBS-g-MA. The torque rheometer degradation study also supported the increased compatibility between SEBS-g-MA, PLA, and ABS. The TGA results show that the PLA/ABS and PLA/ABS/SEBS-g-MA blends are more thermally stable than the neat PLA polymer at higher temperatures. The results showed that the ideal composition is the heat-treated PLA/ABS/SEBS-g-MA (60/30/10 wt%), given the high impact strength and HDT results. The results of this work in terms of mechanical improvement with the use of compatibilizers and annealing suggest that the PLA/ABS/SEBS-g-MA system can be used in the production of 3D-printing filaments.
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ISSN:2073-4360
2073-4360
DOI:10.3390/polym15163434