Compatibilization and reinforcement of highly filled wood flour/polyethylene composites via peroxide‐induced grafting and crosslinking

Polymer Composites, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 17, 2025

Abstract The industrialized development of biocomposites effectively promotes the high‐value utilization waste biomass resources, generating substantial economic benefits. However, in highly filled systems (≥50 wt.%), wood flour agglomeration and poor interfacial compatibility between components significantly degrade performance final biocomposites, thus restricting their applications. In this work, we developed a low‐maleic anhydride grafted microcrosslinking polyethylene matrices specialized for (50–70 wt.%) enhancing mechanical properties. successful grafting maleic (MAH) onto molecular chains formation crosslinked structure were evidenced by characteristic infrared absorption peak at 1792 cm −1 new torque peak. Grafting matrix with MAH enhanced adhesion matrix, as well dispersion within matrix. Adding small amount peroxide (0.09 improved tensile, flexural, impact strengths composites up to 120%, 125%, 209%, respectively, compared unmodified composites. This study proposes simple cost‐effective method low modification innovative application system yields significant results expands applications construction materials. Highlights Matrix enhances compatibility. Initiator‐induced crosslinking plastic deformation. properties Fine particles enhance energy

Language: Английский

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Development of lightweight and thermally insulative crosslinked polypropylene via rotomolding

Polymer Engineering and Science, Journal Year: 2025, Volume and Issue: unknown

Published: March 25, 2025

Abstract In this study, lightweight and thermally insulative crosslinked polypropylene (xPP) parts were successfully produced for the first time using a straightforward dicumyl peroxide (DCP) crosslinking technique via rotational molding. A novel cellular structure was achieved by incorporating varying DCP contents (0.5–2.5 phr) during rotomolding process. An increase in content led to corresponding both gel crosslink density, while leading lower density. particular, addition of 2.5 phr significantly increased cell size 33% (528–704 μm) density 540% (1.5–9.6 × 10 3 cells/cm ), decreasing 58% (0.902–0.378 g/cm ). Moreover, thermal conductivity resistivity (insulation power) analyzed over temperature range (23–120°C) different applications. The results show that porous substantially improved resistance (691%) with very low (0.055 W/m K) at room temperature. This innovative approach not only represents significant progress development materials but also sets benchmark future research field polymer foams, opening door wide applications, especially rotomolded parts. Highlights effect on final properties studied. incorporation into PP within process structures. Lightweight highly structures obtained. Temperature‐dependent studied various enhanced

Language: Английский

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Sustainability in rotational molding: a study on recycling and the influence of additives

International Polymer Processing, Journal Year: 2025, Volume and Issue: unknown

Published: April 22, 2025

Abstract The rationale for recycling in the rotational molding community is arguably stronger than other sectors of polymer industry since process more likely to produce extremely large parts and regardless whether scrap generated from an end-of-life situation or off-spec production, this material often too much valuable diversion landfill. It therefore important establish test methods knowledge on how keep these polymeric materials within a circular economy. There unfortunately little experimental data by rotomolding processors understand feasibility reclaiming their which study aims address. molded commercial-grade reactor-grade polyethylene were examined over several repeated cycles, each case with between 10 50 % reclaim content, then quality indicators based mechanical rheological properties, part color surface void content. stabilized resin showed negligible changes four recycle passes, except yellowness, while unstabilized minor signs change second pass. A narrow examination followed contributions antioxidants versus UV stabilizers performance witnessed trials. Overall, shows that robust very possible grades, especially those intended process.

Language: Английский

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An Upcycling Strategy for Polyethylene Terephthalate Fibers: All-Polymer Composites with Enhanced Mechanical Properties

Journal of Composites Science, Journal Year: 2024, Volume and Issue: 8(12), P. 527 - 527

Published: Dec. 14, 2024

In this work, an effective route for achieving high-performance all-polymer materials through the proper manipulation of material microstructure and starting from a waste is proposed. particular, recycled polyethylene terephthalate (rPET) fibers discarded safety belts were used as reinforcing phase in melt-compounded high-density (HDPE)-based systems. The formulated composites subjected to hot- cold-stretching obtaining filaments at different draw ratios. performed characterizations pointed out that morphology can be profitably modified application elongational flow, which was proven able promote significant microstructural evolutions rPET dispersed domains, eventually leading obtainment micro-fibrillated composites. Furthermore, tensile tests demonstrated hot-stretched and, especially, cold-stretched show significantly enhanced modulus strength compared unfilled HDPE filaments, likely due formation highly oriented anisotropic microstructure.

Language: Английский

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