Influence of processing parameters on mechanical and thermal behavior of PLA/PBAT blend

Barbosa, Virnna Cristhielle Santana; Sousa, Atos Alves de; Silva, Ana Lúcia Nazareth da

doi:10.1590/0104-1428.20220018

Cited by 2 publications

(3 citation statements)

References 34 publications

(60 reference statements)

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“…Bands observed at 1264, 1181, and 1080 cm −1 are ascribed to stretching vibrations of the CO groups of COC. The FTIR structural results of PLA and PLAT agree with the literature 60–63 . The PLAT showed roughly the same bands as the untreated PLA, which suggests that the annealing heat treatment did not affect the main absorption bands of PLA.…”

Section: Resultssupporting

confidence: 85%

“…The high-intensity absorption band at C O C. The FTIR structural results of PLA and PLAT agree with the literature. [60][61][62][63] The PLAT showed roughly the same bands as the untreated PLA, which suggests that the annealing heat treatment did not affect the main absorption bands of PLA. However, two small bands appeared in PLAT, as shown in the magnification of the FTIR spectrum in the 900-1250 cm À1 range in Figure 5 (a).…”

Section: Fourier Transform Infrared Spectroscopymentioning

confidence: 99%

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Tuning the mechanical and thermomechanical properties through the combined effect of crosslinking and annealing in poly(lactic acid)/acrylonitrile‐EPDM‐styrene blends

Luna,

Da Silva Barbosa Ferreira,

Do Nascimento

et al. 2024

J of Applied Polymer Sci

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Acrylonitrile‐EPDM‐styrene (AES) was applied as an impact modifier for poly(lactic acid) (PLA), and the combined effect of dicumyl peroxide (DCP) crosslinking and annealing heat treatment was investigated. Torque rheometry, melt flow index (MFI), mechanical properties (impact, tensile, and Shore D hardness), X‐ray diffraction (XRD), infrared spectroscopy (FTIR), heat deflection temperature (HDT), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM) were investigated. There was a considerable torque increment and fluidity drop in the PLA/AES/DCP blends caused by the crosslinking process and the formation of PLA‐g‐AES. Consequently, the impact strength and elongation at break properties improved. As an engineering terpolymer, AES was decisive in maintaining high elastic modulus, Shore D hardness, and HDT values. The PLA/AES/DCP (0.8 phr) composition leaned towards a synergism of mechanical properties, gaining 505.6% and 264.8% in impact strength and elongation at break, respectively, compared to neat PLA. FTIR and XRD analysis revealed high crystallinity, with samples presenting large crystals. The higher crystallinity had a deleterious effect on the mechanical properties of the PLA/AES/DCP blends. However, there was a marked improvement in HDT and higher toughness compared to PLA. The results before and after annealing the PLA/AES/DCP (0.8 phr) blend are promising for constructing new semi‐biodegradable materials for additive manufacturing.

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Section: Resultssupporting

confidence: 85%

Section: Fourier Transform Infrared Spectroscopymentioning

confidence: 99%

Tuning the mechanical and thermomechanical properties through the combined effect of crosslinking and annealing in poly(lactic acid)/acrylonitrile‐EPDM‐styrene blends

Luna,

Da Silva Barbosa Ferreira,

Do Nascimento

et al. 2024

J of Applied Polymer Sci

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“…PBAT is a biodegradable aliphatic polyester that is fully degradable under composting conditions and has excellent ductility and thermal stability [ 17 ]; there exist some complementarities between the physical–mechanical properties of PLA and PBAT; therefore, some researchers have focused on the development of PBAT/PLA blends by traditional processing methods. For example, Barbosa et al [ 18 ] prepared two kinds of PBAT/PLA blends by extrusion and injection molding. For the first blend, both maleic anhydride(MA) and dicumyl peroxide were used as additives; for the second one, no additives were adopted.…”

Section: Introductionmentioning

confidence: 99%

FDM 3D Printing and Properties of PBAT/PLA Blends

Yu,

Li,

Lei

et al. 2024

Polymers

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Biodegradable polylactic acid (PLA) has been widely used in fused deposition modeling (FDM) 3D printing. In order to improve its comprehensive properties in 3D printing, in this study, 0-40% content of polybutylene adipate terephthalate(PBAT) was selected to be blended with PLA in a twin-screw extruder; the resulting pellets were drawn into a homogeneous filament; then, PBAT/PLA samples were prepared by FDM 3D printing, and the effects of the dosage of PBAT on the mechanical properties, thermal behavior, surface wettability and melt flowability of the samples were investigated. The results showed that all the samples could be printed smoothly, and the ductility was slightly improved by the increase in the PBAT dosage; the thermal stability of PLA was enhanced by blending with PBAT, and the crystallinity increased monotonically with the increase in PBAT. After blending with PBAT, the surfaces of the samples were more hydrophilic and flowable. The important conclusion achieved in this work was that the PBAT/PLA blends, especially those containing 30%PBAT, showed great potential to replace petroleum-based plastics and are suitable for use in FDM 3D printing technologies for different applications.

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Influence of processing parameters on mechanical and thermal behavior of PLA/PBAT blend

Abstract: This paper has been partially presented at the 16th Brazilian Polymer Congress,held on-line, 24-28/Oct/2021.

Cited by 2 publications

References 34 publications

Tuning the mechanical and thermomechanical properties through the combined effect of crosslinking and annealing in poly(lactic acid)/acrylonitrile‐EPDM‐styrene blends

Tuning the mechanical and thermomechanical properties through the combined effect of crosslinking and annealing in poly(lactic acid)/acrylonitrile‐EPDM‐styrene blends

FDM 3D Printing and Properties of PBAT/PLA Blends

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