Interactive Influence of Biofiber Composition and Elastomer on Physico-Mechanical Properties of PLA Green Composites

Soleimani, Majid; Tabil, Lope G.; Oguocha, I. N. A.; Fung, Jimmy

doi:10.1007/s10924-017-0967-8

Cited by 9 publications

(2 citation statements)

References 29 publications

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“…1–6 Many efforts have been made to improve the PLA toughness and this subject is still a knowledge gap to be investigated. 7–13…”

Section: Introductionmentioning

confidence: 99%

“…Thermoplastics modified with elastomers have aroused great interest from researchers and industries due to the attractive cost/benefit ratio and the possibility of a significant increase of the toughness under impact of fragile polymers with the incorporation of a dispersed rubbery phase. 8–14 Li and Shimizu studied the incorporation of polyurethane (PU) elastomer in the PLA matrix. 15 They concluded that as increased PU content, the blend showed a decrease in tensile strength and elastic modulus; however, the elongation at break and the impact strength were significantly increased, indicating the toughening effects of the PU elastomer on the PLA.…”

Section: Introductionmentioning

confidence: 99%

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Toughness improvement of poly(lactic acid) by the addition of pre-crosslinked powdered nitrile rubber/CaCO₃ for thermoforming molding

Almeida

Oliveira

Sousa

et al. 2020

Journal of Elastomers & Plastics

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Polylactide (PLA) is an eco-friendly biodegradable thermoplastic with excellent processability, demanding less energy to be produced compared to the petroleum-based polymers. However, PLA has drawbacks that impose some restrictions of uses use such as poor toughness property. Blending PLA with other polymers is a more practical and economic way to improve its toughness. The present study assessed the effect of the addition of the pre-crosslinked powdered nitrile rubber (NBR) containing calcium carbonate (CaCO3) and extruder screw rotation on the mechanical, rheological, morphological and thermal properties of polylactide (PLA) by using a Central Composite Rotatable Design (CCRD) analysis, which provides statistical support for the experimental data. The results showed that NBR/CaCO3 can be used as toughness modifier for PLA. This property improved due to the increase in energy expended to deform the material and generate cracks, as showed in the impact and morphological analyzes. Despite this improvement, the presence of CaCO3 caused a slight decline in the thermal resistance of the composites. The influence of rubber (NBR/CaCO3) content in PLA matrix on rheological properties, such as elongation viscosity, melt strength and drawability was also investigated. The results showed that the composition PLA/NBR/CaCO3 with higher NBR/CaCO3 content can be used in thermoforming applications.

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“…1–6 Many efforts have been made to improve the PLA toughness and this subject is still a knowledge gap to be investigated. 7–13…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Toughness improvement of poly(lactic acid) by the addition of pre-crosslinked powdered nitrile rubber/CaCO₃ for thermoforming molding

Almeida

Oliveira

Sousa

et al. 2020

Journal of Elastomers & Plastics

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Fabrication of nonextruded recycled rubber–polyethylene composites

Soleimani

Cree

Olson

et al. 2020

J of Applied Polymer Sci

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This study was conducted to investigate the possibility of one‐stage molding process skipping compounding extrusion for the fabrication of cross‐linked polyethylene (PE)‐ground tire rubber (GTR) composites. The process resulted in a wide range of composites with various properties. Response surface methodology technique based on central composite design was employed with variables: polyethylene content (PE: % per polymer fraction), dicumyl peroxide (DC: % per polymer fraction), molding residence time (RT: min), and filler content (F: % per total mass). A quadratic model was able to significantly describe tensile strength, elongation at break (EB), and impact resistance/energy of the composites as a function of PE, DC, RT, and F. Tensile strength (TS) was positively affected by PE, DC, and RT; however, it was negatively affected by the filler content. Tensile EB and impact resistance of the composites were improved by DC and RT, while reduced by PE and filler increment. Composites with TS, ultimate elongation, and impact resistance of 11.5 MPa, 140%, 244 MJ/m2, respectively, were obtained under optimized conditions. The nonextrusion molding process is recommended for the fabrication of PE‐GTR composites due to the higher stiffness/tensile modulus and a slightly lower strength of nonextruded composites compared to the extruded composites.

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Exploring biofiber properties and their influence on biocomposite tensile properties

Oyedeji,

Hess,

Zhao

et al. 2024

Polymer International

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Biofibers serve as effective reinforcements for neat polylactic acid (PLA) in biocomposites, offering an attractive opportunity to decarbonize the manufacturing sector of the United States by displacing fossil‐based reinforcement fibers such as carbon fibers. Also, biofiber production can stimulate economic growth in rural economies, fueling sustainable development. PLA resins are commonly compounded with biofibers to create biocomposites suitable for additive manufacturing. PLA‐biofiber composites often exhibit better overall material properties than neat (pure) PLA, but the associations between biofiber properties and the material properties of their biocomposites remain largely unexplored. Hence, this research delves into a comprehensive exploration of diverse biofibers, scrutinizing their physical and chemical attributes, including size, shape, ash content and biochemical composition. The study meticulously analyzes the flow properties of each biofiber and elucidates the ultimate tensile strengths and Young's modulus of corresponding biocomposite samples. Noteworthy correlations between biofiber and biocomposite tensile properties are uncovered, shedding light on critical interrelationships. The study introduces an approach employing regression models to predict the ultimate tensile strength and Young's modulus of biocomposites. These models, validated with a cross‐validation technique, exhibit remarkable predictive accuracy, particularly in estimating ultimate tensile strength. © 2024 Oak Ridge National Laboratory managed by UT‐Battelle, LLC and The Author(s). Polymer International published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.

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Interactive Influence of Biofiber Composition and Elastomer on Physico-Mechanical Properties of PLA Green Composites

Cited by 9 publications

References 29 publications

Toughness improvement of poly(lactic acid) by the addition of pre-crosslinked powdered nitrile rubber/CaCO₃ for thermoforming molding

Toughness improvement of poly(lactic acid) by the addition of pre-crosslinked powdered nitrile rubber/CaCO₃ for thermoforming molding

Fabrication of nonextruded recycled rubber–polyethylene composites

Exploring biofiber properties and their influence on biocomposite tensile properties

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Interactive Influence of Biofiber Composition and Elastomer on Physico-Mechanical Properties of PLA Green Composites

Cited by 9 publications

References 29 publications

Toughness improvement of poly(lactic acid) by the addition of pre-crosslinked powdered nitrile rubber/CaCO3 for thermoforming molding

Toughness improvement of poly(lactic acid) by the addition of pre-crosslinked powdered nitrile rubber/CaCO3 for thermoforming molding

Fabrication of nonextruded recycled rubber–polyethylene composites

Exploring biofiber properties and their influence on biocomposite tensile properties

Contact Info

Product

Resources

About

Toughness improvement of poly(lactic acid) by the addition of pre-crosslinked powdered nitrile rubber/CaCO₃ for thermoforming molding

Toughness improvement of poly(lactic acid) by the addition of pre-crosslinked powdered nitrile rubber/CaCO₃ for thermoforming molding