Thermal Properties of Composites Made of Heat-treated Wood and Polypropylene

Kaboorani, Alireza

doi:10.1177/0021998309345291

Cited by 32 publications

(33 citation statements)

References 7 publications

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“…In addition, heat treatment either removes or changes the structure of the most sensitive components of wood (Kaboorani 2009;Xing and Li 2014). The first decomposition peak temperature of heat-treated wood and WPCs produced with the untreated wood flour was around 220 °C and 200 °C, respectively.…”

Section: Thermogravimetric Analysismentioning

confidence: 99%

Technological and Thermal Properties of Thermoplastic Composites Filled with Heat-treated Alder Wood

et al. 2016

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This study investigated the effect of heat-treated wood content on the water absorption, mechanical, and thermal properties of wood plastic composites (WPCs). The WPCs were produced from various loadings (30, 40, and 50 wt%) of heat-treated and untreated alder wood flours (Alnus glutinosa L.) using high-density polyethylene (HDPE) with 3 wt% maleated polyethylene (MAPE) coupling agent. All WPC formulations were compression molded into a hot press for 3 min at 170 ºC. The WPCs were evaluated using mechanical testing, Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). The mechanical property values of the WPC specimens decreased with increasing amounts of the heattreated wood flour, except for the tensile modulus values. The heat treatment of alder wood slightly increased the thermal stability of the WPCs compared with the reference WPCs. The crystallization degree (Xc) and the enthalpy of crystallization of the WPCs slightly decreased with increasing content of the heat-treated wood flour. However, all WPCs containing the heat-treated alder wood flour showed a higher crystallinity degree than that of the virgin HDPE.

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Section: Thermogravimetric Analysismentioning

confidence: 99%

Technological and Thermal Properties of Thermoplastic Composites Filled with Heat-treated Alder Wood

et al. 2016

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“…In addition, heat treatment either removes or changes the structure of the most sensitive components of wood (Kaboorani 2009;Xing and Li 2014).…”

Section: Thermal Propertiesmentioning

confidence: 99%

Influence of Repeated Injection Molding Processing on Some Mechanical and Thermal Properties of Wood Plastic Composites

Kaymakçı¹,

Ayrılmış²

2016

BioResources

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The influence of repeated cycles of injection molding on some mechanical and thermal properties of wood plastic composites (WPCs) was investigated. Pine wood flour (50 wt%) was mixed with HDPE (50 wt%) containing compatibilizing agent (MAPE, 3 wt%) in a co-rotating twinscrew extruder. The test specimens were produced by injection molding from the pellets dried to the moisture content (MC) of 1%. After the mechanical properties of the WPC test specimens were determined, the failed specimens were subsequently pelletized. These pellets were stored and dried for 4 to 6 h until the repeated injection was molded. These processes were repeated seven times. The results revealed that the flexural strength of WPCs increased by about 5.26% from the original granules to the third injection cycle, but further increments in the number of cycles decreased the flexural strength. The tensile strength and tensile modulus of the WPC specimens increased until the third cycle of injection molding while they tended to decrease after the third injection cycle.

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“…This furher reinforces the fact that 4 wt% NaOH concentration may be the optimum concentration at which the thermal stability of NaOH treated WPCs produced from D.niella oliveri wood flour is highest. Hence, it may be inferred that reinforcing vHDPE with alkaline treated wood has increased the thermal resistance of the neat matrix [43]. However, as the concentration of NaOH increases above 4 wt%, the reduction noted in T onset , T 50% and T p could be attributed to the reduced thermal stability of the treated wood flour compared with optimal composite sample [44].…”

Section: Thermal Stabilitymentioning

confidence: 99%

Mechanism of fiber/matrix bond and properties of wood polymer composites produced from alkaline-treatedDaniella oliveriwood flour

et al. 2015

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The effects of sodium hydroxide (NaOH) concentration and time of treatment on the mechanism of fiber/matrix bond and functional properties of Daniella oliveri reinforced wood polymer composites (WPCs) were investigated. The WPCs were evaluated using Fourier transform infrared spectroscopy, mechanical testing, scanning electron microscopy, thermogravimetric analysis (TGA), and differential scanning calorimetry. The fiber/matrix adhesion mechanism could be attributed to the disruption of hydrogen bonding in the D. oliveri wood fiber network structure and the removal of lignin, wax and oils covering the external surface of the fiber cell wall. This leads to an increase in desirable functional properties as alkaline concentrations reached 4 wt%, but subsequently reduced at higher concentrations, while they increased with treatment time. Analysis of the fractographs of the WPCs suggests optimization of interfacial fiber–matrix adhesion and functional properties when D. oliveri wood fiber was treated with a 4 wt% solution of NaOH for 150 min. POLYM. COMPOS., 37:2657–2672, 2016. © 2015 Society of Plastics Engineers

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Thermal Properties of Composites Made of Heat-treated Wood and Polypropylene

Cited by 32 publications

References 7 publications

Technological and Thermal Properties of Thermoplastic Composites Filled with Heat-treated Alder Wood

Technological and Thermal Properties of Thermoplastic Composites Filled with Heat-treated Alder Wood

Influence of Repeated Injection Molding Processing on Some Mechanical and Thermal Properties of Wood Plastic Composites

Mechanism of fiber/matrix bond and properties of wood polymer composites produced from alkaline-treatedDaniella oliveriwood flour

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