Production of PLA/NR blends compatibilized with EE-g-GMA and POE-g-GMA: an investigation of mechanical, thermal, thermomechanical properties and morphology

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

doi:10.1007/s10965-023-03504-0

Cited by 12 publications

(3 citation statements)

References 74 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Its outstanding properties include being highly rigid, biodegradable, biocompatible, renewable, and recyclable [ 2 , 6 , 7 , 8 ]. Consequently, it is an interesting biodegradable polymer with major applications in packaging, automotive, and biomedical fields [ 9 , 10 , 11 , 12 , 13 ]. Unfortunately, PLA is too brittle and has low impact resistance at room temperature due to its quite low glass-transition temperature, limiting its utilization.…”

Section: Introductionmentioning

confidence: 99%

“…Unfortunately, PLA is too brittle and has low impact resistance at room temperature due to its quite low glass-transition temperature, limiting its utilization. Many researchers have attempted to improve the toughness of PLA by incorporating a rubbery phase into PLA, a process known as rubber toughening [ 12 , 14 , 15 , 16 ]. The dispersion of rubber micro or nanoparticles in a brittle polymer can provide energy absorption through the initiation of local yielding [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Modified Natural Rubber on the Mechanical and Thermal Properties of Poly(Lactic Acid) and Its Composites with Nanoparticles from Biowaste

Injorhor,

Inphonlek,

Ruksakulpiwat

et al. 2024

Polymers

View full text Add to dashboard Cite

The brittle behavior of poly(lactic acid) (PLA) and PLA composites with inorganic filler limits their applications; the addition of a toughening agent, such as a rubbery phase, was selected to transform the brittle to ductile behavior for versatility in various applications. This work aims to study the properties of PLA and PLA composite with filled nanosized hydroxyapatite (nHA) after adding modified natural rubber (MoNR), which acts as a toughening agent. MoNR refers to poly(acrylic acid-co-acrylamide)-grafted deproteinized natural rubber. nHA was prepared from fish scales. Its characteristics were investigated and was confirmed to be comparable to those of commercial grade. PLA-MoNR at various MoNR contents and PLA/nHA composites with/without MoNR were prepared by melt mixing. Their morphology, mechanical, and thermal properties were observed and investigated. Samples with MoNR added showed the dispersion of spherical particles, indicating incompatibility. However, the mechanical properties of PLA-MoNR, which had MoNR added at 10 phr, showed toughening behavior (increased impact strength by more than two times compared to that of neat PLA). The PLA/nHA composite with MoNR showed the same result. The addition of MoNR in the composite increased its impact strength by 1.27 times compared to the composite without MoNR. MoNR can be a stress concentrator, resulting in toughened PLA and PLA/nHA composite.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Modified Natural Rubber on the Mechanical and Thermal Properties of Poly(Lactic Acid) and Its Composites with Nanoparticles from Biowaste

Injorhor,

Inphonlek,

Ruksakulpiwat

et al. 2024

Polymers

View full text Add to dashboard Cite

show abstract

“…In addition, the growing importance of sustainable industry has increased the need to improve PLA performance, aiming to replace commodity polymers for practical applications. There are several current reports on alternatives to address PLA deficiencies, such as heat treatments [32][33][34] to increase its thermomechanical stability, production of blends [35][36][37] to improve impact strength, ductility, and thermal stability, as well as in the development of eco-composites. 38,39 Although PLA costs more than commodity polymers, consumption is increasing rapidly.…”

Section: Introductionmentioning

confidence: 99%

On the Production of Poly(Lactic Acid) (PLA) Compounds with Metallic Stearates Based on Zinc, Magnesium and Cobalt. Investigation of Torque Rheometry and Thermal Properties

Cordeiro,

Luna,

da Silva

et al. 2023

Journal of Elastomers & Plastics

Self Cite

View full text Add to dashboard Cite

The addition effects of zinc (Zn), cobalt (Co), and magnesium (Mg) based metallic stearates into poly (lactic acid) (PLA) matrix were investigated through torque rheometry, thermogravimetry (TG) and in the Differential Scanning Calorimetry (DSC). PLA compounds/metallic stearates were processed using an internal laboratory mixer with 0.25 wt% Zn, Co, and Mg. Torque rheometry results indicated that PLA/stearate compounds showed higher thermomechanical degradation during processing related to PLA. PLA viscosity is reduced upon stearates addition, especially in the compound with Zn. This behavior suggested PLA chain scission in the presence of metallic stearates during processing, corroborating the decrease in the torque plots. PLA/Zn started to lose weight at lower temperatures than the other compounds, indicating higher pro-oxidant potential. It was observed that Co and Zn significantly reduced the glass transition temperature (Tg), as well as PLA’s crystalline parameters, which suggests PLA’s molecular scission during processing, heading to greater flexibility and reducing Tg. Zn stearate was the most aggressive to PLA’s thermomechanical degradation, suggesting a stronger pro-degradant effect.

show abstract

Tailoring the performance of poly(lactic acid)‐based reactive blends: The effect of vinyl acetate and dicumyl peroxide content

Ferreira

Nascimento

Luna

et al. 2023

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

Poly(lactic acid) has been gaining prominence in academia and industry, mainly due to being a biopolymer and biodegradable material. Nevertheless, mainly due to its high fragility, work has been carried out in order to seek alternatives to improve this drawback. Hence, this work aims to evaluate the effect of the vinyl acetate content using two types of EVA (EVA1 with 28% and EVA2 with 19%) in dynamically vulcanized PLA/EVA blends, using several dicumyl peroxide (DCP) contents, that is, 0.3, 0.5, and 0.7 phr. Blends were produced using an internal mixer, and the tensile, impact and HDT specimens were injection molded. By FTIR and torque rheometry, it was verified that, upon DCP addition, there was evidences of reticulation, resulting in crosslinked PLA, crosslinked EVA, as well as PLA‐g‐EVA. Through tensile and impact strength tests, it was observed substantial increases in the elongation at break, and in impact strength, mainly for the compounds with higher content of vinyl acetate (EVA1). Impact specimens made with PLA/EVA120 0.7 DCP, PLA/EVA130 0.5 DCP, and 0.7 DCP, did not completely break, due to the probable development of the in situ PLA‐g‐EVA compatibilizer among the present phases. Therefore, it is believed that a more homogeneous microstructure was obtained, as observed by SEM images, highlighted upon the DCP content increase. It was verified that the highest vinyl acetate content is of paramount importance for obtaining PLA/EVA blends with better compatibility as well as EVA1 being more susceptible to crosslinking using DCP, resulting in blends with greater toughness.

show abstract

Production of PLA/NR blends compatibilized with EE-g-GMA and POE-g-GMA: an investigation of mechanical, thermal, thermomechanical properties and morphology

Cited by 12 publications

References 74 publications

Effect of Modified Natural Rubber on the Mechanical and Thermal Properties of Poly(Lactic Acid) and Its Composites with Nanoparticles from Biowaste

Effect of Modified Natural Rubber on the Mechanical and Thermal Properties of Poly(Lactic Acid) and Its Composites with Nanoparticles from Biowaste

On the Production of Poly(Lactic Acid) (PLA) Compounds with Metallic Stearates Based on Zinc, Magnesium and Cobalt. Investigation of Torque Rheometry and Thermal Properties

Tailoring the performance of poly(lactic acid)‐based reactive blends: The effect of vinyl acetate and dicumyl peroxide content

Contact Info

Product

Resources

About