Maleated soybean oil as coupling agent in recycled polypropylene/wood flour composites: Mechanical, thermal, and morphological properties

Poletto, Matheus

doi:10.1177/0892705718785707

Cited by 14 publications

(10 citation statements)

References 30 publications

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“…Although the behavior of the thermogravimetric analysis curves showed a similar behavior for all samples, the expected thermal behavior for the composites was the presence of at least two stages of thermal degradation (seen in the DTG). The composite containing natural fiber was expected to present at least two evident degradation peaks as described by Poletto [8], where the first peak with lower temperatures (220 °C and 370 °C), which would be associated with the degradation of cellulose, hemicellulose and lignin, and the second degradation peak would involve thermal degradation mainly of polypropylene at temperatures between 370 °C and 500 °C. However, the peaks were restricted to the peaks of thermal degradation of polypropylene.…”

Section: Thermogravimetric Analysismentioning

confidence: 97%

“…For a composite with interaction and good properties it is necessary to obtain an uniform mixture [5]. The use of coupling agents is the most popular technique for the production of WPC, mainly due to its rapid production, in addition to being a convenient and attractive method, in the sense that it can facilitate the preparation steps by directly melting the mixture of the natural fiber with the thermoplastic polymer [7,8]. As for the renewable coupling agents, glycerol is a byproduct derived from the production of biodiesel, whose production in Brazil is higher than its consumed volume, even though it is an industrially versatile product, therefore, its application in composites would present an alternative to use part of the crude glycerol produced [9].…”

Section: Introductionmentioning

confidence: 99%

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Influence of the use of Renewable Compatibility Agent Wood Plastic Composite (WPC)

Marin

Chiarello²,

Gruber³

et al. 2022

J. Res. Updates Polym. Sci.

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The growing interest in using recycled and natural materials in the application of new composites in recent years implies ecological, economic and versatility benefits. Wood plastic composite (WPC) are considered very attractive materials, as they allow the use of polymers of recycled or virgin origin, associated with forestry by-products. The present work aims to investigate the influence on the mechanical, thermal and morphological resistance of WPC, using oleic acid and glycerol as renewable coupling agents. Composites were also prepared with a commercial compatibility agent in its formulation - maleic anhydride grafted polypropylene (MAPP) - under the same conditions. The composites were prepared in a single-screw extruder, with fixed contents of 5% sawdust with 95% virgin polymer, of this total, 2% were coupling agents: MAPP, oleic acid or glycerol, according to the desired composition. To be evaluated as changes in mechanical properties, tensile and impact strength tests were performed on specimens obtained through the injection molding process. The fracture surfaces of specimens tested in tensile tests were examined using images generated by scanning electron microscopy. The thermal stability of the composites was also investigated by thermogravimetric analysis. The use of glycerol and oleic acid improved the mechanical properties of the composite. An increase in tensile strength is observed when glycerol is added in composite. As for impact strength, the addition of glycerol or oleic acid was around 58% higher in impact strength when compared to without coupling agent. Glycerol and oleic acid are renewable, low-cost alternative to be a potential substitute for the commercial coupling agent MAPP, especially when the main requirement is to obtain better impact resistance properties.

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Section: Thermogravimetric Analysismentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Influence of the use of Renewable Compatibility Agent Wood Plastic Composite (WPC)

Marin

Chiarello²,

Gruber³

et al. 2022

J. Res. Updates Polym. Sci.

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“…As a consequence, there was a balance between the plasticizer effect and the restriction of ller mobility in the BioPE/WP/PE-g-MA/Oil composite, generating an intermediate torque curve between BioPE and the BioPE/WP and BioPE/WP/PE-g-MA systems. The literature [40,41] reports that natural oils have technological potential to interact with wood powder, including to act as a compatibilizer.…”

Section: Torque Rheometrymentioning

confidence: 99%

From Waste to Reuse: Manufacture of Ecological Composites Based on Biopolyethylene/wood Powder with PE-g-MA and Macaíba Oil

et al. 2021

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This work aimed to investigate the biopolyethylene (BioPE)/wood powder (WP) composites compatibilized with polyethylene-grafted maleic anhydride (PE-g-MA), using macaíba oil (OM) as a processing aid. The composites were prepared, initially, in an internal mixer and, later, the crushed akes were molded by injection. Mechanical properties (impact, tensile, exural and Shore D hardness), heat de ection temperature (HDT), Vicat softening temperature, differential scanning calorimetry (DSC), thermogravimetry (TG), water absorption, torque rheometry and scanning electron microscopy (SEM) were evaluated. The addition of 30% wood powder to the BioPE matrix increased the elastic modulus (tensile and exural), Shore D hardness and heat de ection temperature (HDT), compared to neat BioPE. These properties were improved when 10% of the PE-g-MA compatibilizer was added, compared to neat BioPE and the non-compatibilized composite. There was a signi cant reduction in the torque of the composites with the addition of macaíba oil, indicating that it improved the processability. In addition, the incorporation of macaíba oil into the composites helped to reduce water absorption, as well as to increase impact strength. SEM micrographs illustrated a greater degree of interfacial adhesion when PEg-MA and macaiba oil were added.

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“…Soybeans are among the world's main commodities due to their many uses in both the food and biofuel markets; not to mention that soybean oil, in addition to essential micronutrients and vitamins, has excellent culinary properties beneficial to health (GU; WU, 2013;POLETTO, 2019;RUDDLE et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Associative Mapping for Exotic Soybean Germplasm Grain Yield in High Temperatures

Sousa

ASSUNÇÃO

FERREIRA³

et al. 2022

Rev. Caatinga

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Soybeans are among the world’s main crops because they are excellent sources of proteins, micronutrients, and oil. Considering that abiotic stress affects agribusiness, resulting in losses, the grain yield of the crop must be maintained even at high temperatures. In this context, the objective of this study was to select markers related to soybean yield assessed under high temperatures, using associative mapping. The mapping population included 80 soybean PIs and 15 controls. For phenotyping, genotypes were evaluated at high temperatures in an experiment conducted in Teresina (in the state of Piauí) and four characters of interest for agronomy were evaluated: height of the plant when mature, agronomic value, 100-seed weight, and grain yield. Genotyping was carried out using the Affymetrix Platform (180 K Axiom® Soybean Genotyping Array), and the imbalance in the connection between pairs of markers was calculated through the coefficient of determination using the fast permutation test. The analysis of the association between markers and the phenotype of interest was carried out using a generalized linear model approach, including phenotyping data, SNP markers, and information on population structure. The results revealed that 34.06% of loci showed a significant linkage disequilibrium (p < 0.001), and 16 significant associations were found for the four characters related to heat tolerance. These associations can aid breeders that aim to incorporate high temperature tolerance in programs of soybean genetic improvement via selection assisted by markers.

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Maleated soybean oil as coupling agent in recycled polypropylene/wood flour composites: Mechanical, thermal, and morphological properties

Cited by 14 publications

References 30 publications

Influence of the use of Renewable Compatibility Agent Wood Plastic Composite (WPC)

Influence of the use of Renewable Compatibility Agent Wood Plastic Composite (WPC)

From Waste to Reuse: Manufacture of Ecological Composites Based on Biopolyethylene/wood Powder with PE-g-MA and Macaíba Oil

Associative Mapping for Exotic Soybean Germplasm Grain Yield in High Temperatures

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