Biopolyethylene/macaíba shell (<i>Acrocomia intumescens</i>) composites compatibilized with <scp>PE‐g‐MA</scp> and <scp>PE‐g‐AA</scp>: Influence of macaíba oil on processing

Marçal, Vitória Sampaio; Luna, Carlos Bruno Barreto; Araújo, Edcleide Maria; Ferreira, Eduardo da Silva Barbosa; Filho, Edson Antônio dos Santos; Siqueira, Danilo Diniz

doi:10.1002/pc.26531

Cited by 5 publications

(13 citation statements)

References 61 publications

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“…28 Therefore, it is necessary to perform HDT test, which evaluates the thermomechanical resistance of the material during heating. 16…”

Section: Resultsmentioning

confidence: 99%

“…The reactivity probably arises from the interaction between the maleic anhydride group of the EPDM-MA and SEBS-MA copolymers and the hydroxyl groups of the macaíba almond, generating a good interaction. 16,20…”

Section: Torque Measurementsmentioning

confidence: 99%

“…28 Therefore, it is necessary to perform HDT test, which evaluates the thermomechanical resistance of the material during heating. 16 HDT results of PP and investigated composites are shown in Table 3. Note that HDT of PP was around 57°C; upon MA* addition, the HDT subtly decreased to 54°C.…”

Section: Heat Deflection Temperature (Hdt)mentioning

confidence: 99%

“…10,13,14 Ibrahim et al 15 investigated the wood powder addition influence in PP; it was observed that, as a result of the interfacial interaction and the adhesive force between the polymeric matrix and the reinforcement, there was an improvement in the mechanical properties and the tribological properties of the neat polymer. Marçal et al 16 researched the effect of macaiba bark and oil on biopolyethylene (BioPE) processing. Although macaiba bark has shown a reduction in impact strength, the oil acted at the phase interface, improving flexibility and impact strength.…”

Section: Introductionmentioning

confidence: 99%

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PP/MACAIBA almond composites: Effect of SEBS-MA and EPDMA-MA compatibilizers on the mechanical properties and biodegradation

Siqueira,

Luna,

Dos Santos Filho

et al. 2023

Journal of Elastomers & Plastics

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There is a need to develop environmentally friendly materials, especially plastics, that minimize environmental pollution. In this sense, polypropylene (PP) composites were produced with 20 wt% of Macaiba almond powder (MA*) and compatibilized with SEBS-MA and EPDM-MA to carry out a biodegradation investigation of these composites. Mechanical properties (impact, tensile), heat deflection temperature (HDT), scanning electron microscopy (SEM), and Fourier transform spectroscopy (FTIR) experiments were performed. These analyses verified that the best plasticization was reached in the composites with 15% of SEBS-MA and EPDM-MA, indicating an interaction between phases. The impact strength and elongation at break of the PP/MA*/EPDM-MA and PP/MA*/SEBS-MA composites increased significantly, suggesting tough behavior. Biodegradation occurred in the soil for 120 days, and both PP/MA*/10EPDM-MA and PP/MA*/15EPDM-MA demonstrated a mass loss of about 4.68% and 4.0%, respectively. Although PP is not biodegradable, the results show that macaíba almond powder can biodegrade in the PP matrix.

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“…28 Therefore, it is necessary to perform HDT test, which evaluates the thermomechanical resistance of the material during heating. 16…”

Section: Resultsmentioning

confidence: 99%

Section: Torque Measurementsmentioning

confidence: 99%

Section: Heat Deflection Temperature (Hdt)mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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PP/MACAIBA almond composites: Effect of SEBS-MA and EPDMA-MA compatibilizers on the mechanical properties and biodegradation

Siqueira,

Luna,

Dos Santos Filho

et al. 2023

Journal of Elastomers & Plastics

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“…greater thermal stability than PA6, its addition did not increase the stability of the blends, suggesting low/weak interaction between phases and possible incompatibility. 45 According to Lamas et al, 16 it is common for the initial stages of degradation of immiscible blends to be influenced by the characteristics of the matrix. In this case, the initial degradation of the blends shows similar behavior to PA6 and not to PE-g-AA.…”

Section: Fourier Transform Infrared Spectroscopymentioning

confidence: 99%

Insights on the processing and thermal degradation kinetics of PA6/PE‐g‐AA blends

Araújo,

Franco,

Barreto

et al. 2024

J of Applied Polymer Sci

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Blends of polyamide 6 (PA6) and polyethylene‐grafted acrylic acid (PE‐g‐AA) in contents 90/10, 80/20, and 70/30 were processed in a torque rheometer. Fourier transform infrared spectroscopy spectra showed secondary hydrogen bond interactions between COOH (PE‐g‐AA) and NCOH (PA6) groups. Addition of PE‐g‐AA did not promote significant changes in the thermal stability of the blends, as evidenced in the torque curves and thermogravimetric plots, which showed weight loss in a single stage for PA6 and PE‐g‐AA, with T0.01 343 and 409°C, and predominant release of CO2, according to thermogravimetric analysis coupled to infrared spectra. The degradation kinetics were adequately modeled using Friedman, Ozawa—Flynn—Wall, and Vyazovkin, with R2 > 0.99, showing a higher value for PE‐g‐AA, occurring in a complex way with three competitive degradation mechanisms, F1, R3, and An.

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Toward the production of biopolyethylene‐based ecocomposites with improved performance: The potential of eggshell particles as an ecological additive

Bezerra,

Wellen,

Barreto Luna

et al. 2024

J of Applied Polymer Sci

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Low‐density biopolyethylene (BioLDPE) ecocomposites added with particles of eggshell (ES) residue were produced using linear low‐density polyethylene grafted with maleic anhydride (LDPE‐g‐MA) as a compatibilizing agent. BioLDPE/ES and BioLDPE/ES/LDPE‐g‐MA compounds were processed in a twin‐screw extruder, and the specimens were injection molded. Torque rheometry increased and melt flow index reduced more prominently for the BioLDPE/LDPE‐g‐MA biocomposite with 20 phr ES, suggesting higher viscosity. Consequently, there was a higher level of ES particles breakdown, generating greater distribution and dispersion, as verified in optical microscopy and scanning electron microscopy images. This finding was supported by Fourier transform infrared spectroscopy, considering the intense absorption band at 871 cm−1 for BioLDPE/ES (20 phr)/LDPE‐g‐MA biocomposite, indicating a higher level of ES particles dispersion in BioLDPE matrix. Therefore, BioLDPE/ES (20 phr)/LDPE‐g‐MA biocomposite increased the elastic modulus, tensile strength, Shore D hardness, and heat deflection temperature by 51.4%, 16.9%, 16.4%, and 14, 6%, respectively, related to BioLDPE. Additionally, the flexibility was kept as seen in the elongation at break and impact strength, including not fractured during the impact test. Reported results for the biocomposites are valuable mainly for the polymer additive sector, since the ES has the potential to improve BioLDPE properties, expanding the range of applications.

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Biopolyethylene/macaíba shell (Acrocomia intumescens) composites compatibilized with PE‐g‐MA and PE‐g‐AA: Influence of macaíba oil on processing

Cited by 5 publications

References 61 publications

PP/MACAIBA almond composites: Effect of SEBS-MA and EPDMA-MA compatibilizers on the mechanical properties and biodegradation

PP/MACAIBA almond composites: Effect of SEBS-MA and EPDMA-MA compatibilizers on the mechanical properties and biodegradation

Insights on the processing and thermal degradation kinetics of PA6/PE‐g‐AA blends

Toward the production of biopolyethylene‐based ecocomposites with improved performance: The potential of eggshell particles as an ecological additive

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