This study applies the Taguchi method to investigate relationship between ultimate tensile strength, hardness and process variables in a squeeze casting 2017 A wrought aluminium alloy. The effects of various parameters including pressure, melt temperature die were studied. Therefore, objectives for are establish optimal combination reduce variation quality only few experiments. experimental results show that pressure significantly affects microstructure mechanical properties Al

The characterization of the dielectric properties wood–polymer composites (WPCs) is essential to understand their interaction with electromagnetic fields and evaluate potential use for new applications. Thus, spectroscopy monitored evolution WPCs over a wide frequency range 1 MHz GHz. were prepared using mixtures different proportions (40%, 50%, 60%) wood bark fibers from various species, high-density polyethylene, maleated polyethylene (3%) by two-step process, extrusion compression...

In the modern era of Internet Things, potential role flexible piezoelectric generators (PEG) reflects rapid increase in self-powered devices and wearable technologies. this study, a casting process to elaborate polydimethylsiloxane (PDMS)/barium titanate (BaTiO3) composite has been presented. The addition 15 wt % BaTiO3 microparticles into PDMS polymer greatly enhances coefficient (d31 = 24 pC N–1), leading an increased output voltage approximately 4 V under finger tapping force. proposed...

Poor interfacial adhesion between vegetable fibers and bio-based thermoplastics is recognized as a serious drawback for biocomposite materials. To be applicable large-scale production, one should consider appropriate methods of natural fiber handling. This study presented poly(lactic acid) (PLA) reinforced with Alfa short four types treatment were selected. The effect these treatments on the tensile properties morphology biocomposites was studied. Composite samples produced using twin-screw...

Thermal treatments such as torrefaction and fast pyrolysis are commonly employed methods to produce biofuels with high-energetic properties. In this study, wood chips were heat-treated at different temperatures of (315 °C) (400 454 form energetic pellets. Three softwoods, jack pine (JP), balsam fir (BF), black spruce (BS), evaluated. Pellets produced using 20% moisture content 15% pyrolytic lignin a binder. Untreated- treated-wood residues characterized by surface chemistry, elemental...

Abstract The effect of successive injection moldings on the thermal, rheological, and mechanical properties a polypropylene impact copolymer (PP) was investigated. crystal content decreased as molecular weight due to chain scission with repeated molding. Young modulus yield stress remained constant, despite drop in strain break. Virgin recycled PP matrix were filled nanosized calcium carbonate (CaCO 3 ) particles. morphology thermal nanocomposites virgin CaCO particles also studied. strongly...

Abstract The present work is a comparative study of the impact different Alfa fiber modifications on properties, as well polylactic acid (PLA) composites behaviors. A specific process that combines successively mechanical, chemical, and enzymatic treatments (xylanase pectinase) was employed to optimize performances fibers. reduced levels lignin, hemicellulose, pectin in This reduction associated with rise defibrillation degree, an increase cellulose content enhancement thermal stability,...

The physical and mechanical properties of wood (WPC) biochar polymer composites (BPC) obtained at different pyro-gasification temperatures fiber proportions were investigated. Composite pellets made from chips or thermoplastic polymers (polypropylene high-density polyethylene) by twin-screw extrusion, test specimens prepared injection molding. Results showed that BPCs more dimensionally stable compared to WPCs, but their decreased with increasing due the poor adhesion between biochar....

This study investigated the influence of fiber loading and maleated polyethylene (MAPE) coupling agent on structural, thermal, mechanical, morphological properties, torque rheology high-density (HDPE) reinforced with Posidonia oceanica (POF) composites. HDPE/POF composites, both without MAPE, were manufactured using a two-step process: composite pellets extrusion, followed by test samples injection molding various POF loadings (0, 20, 30, 40 wt%). composites higher (40 wt%) exhibit superior...

Currently, ultrasonic measurement is a widely used nondestructive approach to determine wood elastic properties, including the dynamic modulus of elasticity (DMOE). DMOE determined based on density and wave velocity measurement. The use average estimate introduces significant imprecision: Density varies due intra-tree intra-ring differences differing silvicultural treatments. To ensure accurate assessment, we developed prototype device measure with same resolution as that provided by X-ray...

The present article investigates the recycling effect on properties of dilute suspension HDPE reinforced by SGF without coupling agents. This at different proportions loading was produced melt compounding cycles with a single screw extruder. differential scanning calorimetry results have shown an increase in crystallinity proportion and number extrusions. varies from 8.2% for neat 5 extrusions to 13.3% 10% 3 Besides, rheological measurements decrease viscosity matrix 33,800 Pa.s 24,500 after...

This article studies the potential of deinking paper sludge (DPS) and recycled high density polyethylene (RHDPE) for biocomposites (DPS/RHDPE). Different DPS loadings (0 to 20 wt%) compatibilizer content 4 were used in (DPS/RHDPE) formulations. A commercial wet‐strength agent polyamideamine‐epichlorohydrin resin (PAE) was as binder. The effects composition PAE on RHDPE/DPS performance studied. First, chemical composition, morphology thermal behavior characterized using X‐ray diffraction,...