Evaluation of the Mechanical, Thermal and Rheological Properties of Recycled Polyolefins Rice-hull Composites

Orji, Berlinda O.; McDonald, Armando G.

doi:10.3390/ma13030667

Cited by 16 publications

(13 citation statements)

References 40 publications

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“…Double run experiments were performed from 23 to 200 • C at a constant rate of 10 • C•min −1 (nitrogen flow of 50 mL•min −1 ). The degree of crystallinity (Xc) was measured using the enthalpy of fusion (H f ) and rHDPE weight fraction (ω) in the composite, as shown in Equation ( 6) [31]. Theoretical melting enthalpy (H o f ) for completely crystalline HDPE is 293 J•g −1 .…”

Section: Differential Scanning Calorimetry (Dsc)mentioning

confidence: 99%

Processability and Physical Properties of Compatibilized Recycled HDPE/Rice Husk Biocomposites

Rigail-Cedeño

Lazo

Gaona

et al. 2022

JMMP

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The circular economy promotes plastic recycling, waste minimization, and sustainable materials. Hence, the use of agricultural waste and recycled plastics is an eco-friendly and economic outlook for developing eco-designed products. Moreover, new alternatives to reinforce recycled polyolefins and add value to agroindustrial byproducts are emerging to develop processable materials with reliable performance for industrial applications. In this study, post-consumer recycled high-density polyethylene (rHDPE) and ground rice husk (RH) of 20% w/w were blended in a torque rheometer with or without the following coupling agents: (i) maleic anhydride grafted polymer (MAEO) 5% w/w, (ii) neoalkoxy titanate (NAT) 1.5% w/w, and (iii) ethylene–glycidyl methacrylate copolymer (EGMA) 5% w/w. In terms of processability, the addition of RH decreased the specific energy consumption in the torque experiments with or without additives compared to neat rHDPE. Furthermore, the time to reach thermal stability in the extrusion process was improved with EGMA and MAEO compatibilizers. Tensile and impact test results showed that using coupling agents enhanced the properties of the RH composites. On the other hand, thermal properties analyzed through differential scanning calorimetry and thermogravimetric analysis showed no significant variation for all composites. The morphology of the tensile fracture surfaces was observed via scanning electron microscopy. The results show that these recycled composites are feasible for manufacturing products when an appropriate compatibilizer is used.

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Section: Differential Scanning Calorimetry (Dsc)mentioning

confidence: 99%

Processability and Physical Properties of Compatibilized Recycled HDPE/Rice Husk Biocomposites

Rigail-Cedeño

Lazo

Gaona

et al. 2022

JMMP

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“…Moreover, hybridization of such composites by replacing the recycled carbon fiber with kenaf fiber, was reported to reduce the bending strength of the composites from 274.1 to 114.3 MPa 49 . The incorporation of small‐size RH particles (<0.5 mm) enhances the composite properties such as viscosity, flexural strength, moduli, water absorption, and thermal stability of rHDPE composites 31 . Moreover, sisal/rHDPE composites show 22% increase in their Izod impact strength compared to the pure HDPE 37 .…”

Section: Characterization Of Materials Propertiesmentioning

confidence: 99%

Progress and challenges in sustainability, compatibility, and production of eco‐composites: A state‐of‐art review

Nassar

Alzebdeh

Pervez

et al. 2021

J of Applied Polymer Sci

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Owing to economic and environmental benefits, new generations of materials/commodities follow “from waste to wealth” strategy. Recently, there has been a huge upsurge in research on the development of eco‐composites using recycled plastic polymers and agro‐residues because the eco‐composites satisfy the stringent environment regulations and are cost‐effective. Herein, we present a detailed review on the potential use of several types of natural fillers as an efficient reinforcement for recycled plastic polymers. In particular, the characterization of different categories of eco‐composites according to their morphological, physical, thermal, and mechanical properties is extensively reviewed and their results are analyzed, compared, and highlighted. Furthermore, a framework to produce functional eco‐composites, which includes functionalization of ingredients, critical issues on microstructural parameters, processing, and fabrication methods, is outlined and supported with sufficient data from the literature. Finally, the review outlines the emerging challenges and future prospects of eco‐composites to be addressed by interested researchers to bridge the gap between research and commercialization of such a class of material. Overall, the acquired knowledge will guide researchers, scientists, and manufacturers to plan, select, and develop various forms of eco‐composites with enhanced properties and optimized production processes.

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“…Compared to polyethylene alone, for which MFR = 3.3 ± 0.1 g/10 min, a statistically significant decrease in the index value occurred from 10% in the case of fractions with grain size 0.4 mm and 0.4-0.6 mm, while for the 0.6-0.8 mm fraction from the content of 5%. The decrease in the value of the mass melt flow rate with increasing the filler content is the obvious effect of the increase in the viscosity of the composition due to the presence of fine particles dispersed in the polymer matrix [50,73,[87][88][89]. A clear proportional decrease in the MFR value was observed, on average by 0.16 g/10 min with a 5% increase in the content of the two bran fractions 0.4 mm and 0.4-0.6 mm.…”

Section: Mass Melt Flow Ratementioning

confidence: 99%

Analysis of Selected Properties of Biocomposites Based on Polyethylene with a Natural Origin Filler

2020

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The study investigates the effect of the content and size of wheat bran grains on selected properties of a lignocellulosic biocomposite on a polyethylene matrix. The biocomposite samples were made by injection method of low-density polyethylene with 5%, 10% and 15% by weight of wheat bran. Three bran fractions with grain sizes <0.4 mm, 0.4–0.6 mm and 0.6–0.8 mm were used. The properties of the mouldings (after primary shrinkage) were examined after their 2.5-year natural aging period. Processing properties, such as MFR (mass flow rate) and processing shrinkage, were determined. Selected physical, mechanical and structural properties of the produced biocomposite samples were tested. The results allowed the determination of the influence of both the content of bran and the size of its grains on such properties of the biocomposite as: color, gloss, processing shrinkage, tensile strength, MFR mass flow rate, chemical structure (FTIR), thermal properties (DSC, TG), p-v-T relationship. The tests did not show any deterioration of the mechanical characteristics of the tested composites after natural aging.

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Evaluation of the Mechanical, Thermal and Rheological Properties of Recycled Polyolefins Rice-hull Composites

Cited by 16 publications

References 40 publications

Processability and Physical Properties of Compatibilized Recycled HDPE/Rice Husk Biocomposites

Processability and Physical Properties of Compatibilized Recycled HDPE/Rice Husk Biocomposites

Progress and challenges in sustainability, compatibility, and production of eco‐composites: A state‐of‐art review

Analysis of Selected Properties of Biocomposites Based on Polyethylene with a Natural Origin Filler

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