Heterophasic polypropylene and wood flour composites: processing and properties

Pereira, Camila Ariana Becker; Pisanu, Luciano; Barbosa, Josiane Dantas Viana; Azevedo, Joyce Batista; Almeida, Tatiara G.; Fook, Marcus Vinícius Lia; Wellen, Renate Maria Ramos; Canedo, Eduardo L.

doi:10.1088/2053-1591/ab1fc6

Cited by 8 publications

(4 citation statements)

References 21 publications

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“…One such theory involves effects of the reinforcements on the degree of crystallinity of the matrix material when it cools from a melt. Various studies have reported evidence for increased crystallinity in the presence of nano-sized cellulose-based reinforcements (Mokhena and Luyt 2014;Boran et al 2016;Sun 2018;Pereira et al 2019;Peric et al 2019;Wang et al 2019a). Such effects would be expected to be related to the surface area of the reinforcements, which is much higher in the case of nanomaterials.…”

Section: Positive Aspects Of Using Cellulose-based Nanoparticlesmentioning

confidence: 99%

From nanocellulose to wood particles: A review of particle size vs. the properties of plastic composites reinforced with cellulose-based entities

Hubbe¹,

Grigsby²

2020

BioRes

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This review article considers published evidence regarding effects of particle size on mechanical properties of plastic matrix materials filled with cellulose-based reinforcements. Cellulosic or wood-based reinforcements in plastic matrices can contribute to higher modulus, lower density, and less tendency to sag in comparison with the matrix phase by itself, while still allowing the resulting material to be cut or milled. Although cellulosic materials are generally too hydrophilic to adhere well to common thermoplastic materials such as polyethylene, such deficiencies can be overcome by use of compatibilizers, e.g. polyethylene-maleic anhydride. Recently many researchers have evaluated nanocellulose in plastic composites. The higher surface areas of nanocellulose generally imply a higher cost of compatibilizer to achieve good interfacial adhesion. This review first examines results of a large number of studies all involving highdensity polyethylene as the matrix. Then, to get a more detailed mechanistic view, studies are considered that compare different particle sizes of cellulose-based reinforcements within the same conditions of preparation of composites prepared with various matrix polymers. To summarize the findings, there does not appear to be any consistent and dependable advantage of using nano-sized cellulosic reinforcements when trying to achieve higher values of composite strength or modulus.

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Section: Positive Aspects Of Using Cellulose-based Nanoparticlesmentioning

confidence: 99%

From nanocellulose to wood particles: A review of particle size vs. the properties of plastic composites reinforced with cellulose-based entities

Hubbe¹,

Grigsby²

2020

BioRes

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“…The share of wood polymer composites (WPCs) resistant to moisture and temperature extremes has been growing on the market of polymer products in recent years. WPC production is based on mixing plant filler with polymer binders [1][2][3][4][5][6][7][8][9][10][11]. In most cases, the polymer binder is low-pressure polyethylene, since it has high processability and high physical and mechanical properties [2,3,11].…”

Section: Introductionmentioning

confidence: 99%

Development of Thermoplastic Composite Tube from HDPE/Barley Straw Fibers Using Extrusion Method

Kuzmin

Ayrılmış

Chalganov

2022

KEM

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This paper was devoted to the technological process of manufacturing a biocomposites tube made of low-density polyethylene and barley straw fibers. 50% of HDPE, 42% barley straw, 5% of shungite (mineral filler), 2% Maleid F (N, N-metaphenylenediamine) as coupling agent, and 1% Hexol CLA as lubricant were pre-mixed before compounding. The compounding of the raw materials was carried out on a co-rotating twin-screw extruder. The resulting granules were fed into the single screw extruder to obtain thermoplastic composite tubes. The temperature regime for the HDPE/barley straw composite processing was in the range of 145-160 °C and the screw rotation speed was 50 rpm. The tensile strength and modulus were found to be 27.7 MPa and 1687 MPa, respectively. The water absorption (24-h) and density of the specimens were 1.43% and 1.158 g/cm3, respectively. Based on the findings obtained from the present study, it can be said that the barley straw can be efficiently used in the production of tube formed HDPE composites.

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“…It has both a homopolymer PP matrix and dispersed ethylene/propylene particles. Generally, copolymer PP is used in applications that require high impact strength, such as industrial containers [8]. At present, Brazil is one of the largest PP producers worldwide, and it has the largest industrial park in Latin America for the production of industrial containers [9].…”

Section: Introductionmentioning

confidence: 99%

From Disposal to Technological Potential: Reuse of Polypropylene Waste from Industrial Containers as a Polystyrene Impact Modifier

et al. 2020

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The practice of recycling over the years has been increasingly encouraged, with the aim being the manufacturing of materials that contribute to sustainable development. In light of this, the present work evaluated the potential of mixtures of polystyrene (PS)/recycled copolymer polypropylene (PPr), using styrene-(ethylene/butylene)-styrene (SEBS) as a compatibilizing agent. Initially, the mixtures were prepared in a co-rotational twin-screw extruder, and, afterwards, the extruded granules were molded by injection. The properties of torque rheometry, impact strength, tensile properties, differential scanning calorimetry (DSC), heat deflection temperature (HDT), and scanning electron microscopy (SEM) were evaluated. The formulation PS/PPr/SEBS (70/20/10 %wt.) demonstrated an increase in viscosity, corroborating with an increase of 123% and 227% in the elongation at break and impact strength, respectively, compared to neat PS. Though the elastic modulus and tensile strength suffered losses, the reduction was not drastic. Furthermore, the addition of a semi-crystalline recycled material in the amorphous matrix (PS) contributed to an increase in thermomechanical strength, as seen in the HDT. The morphology revealed that SEBS is effective in making PS/PPr mixtures compatible because the dispersed phase is well adhered to the PS matrix and promotes greater morphological stability. Thus, it is possible to add value to discarded material and reduce the costs of the final product, which can reduce pollution.

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Heterophasic polypropylene and wood flour composites: processing and properties

Cited by 8 publications

References 21 publications

From nanocellulose to wood particles: A review of particle size vs. the properties of plastic composites reinforced with cellulose-based entities

From nanocellulose to wood particles: A review of particle size vs. the properties of plastic composites reinforced with cellulose-based entities

Development of Thermoplastic Composite Tube from HDPE/Barley Straw Fibers Using Extrusion Method

From Disposal to Technological Potential: Reuse of Polypropylene Waste from Industrial Containers as a Polystyrene Impact Modifier

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