Acacia bark residues as filler in polypropylene composites

Taflick, Ticiane; Maich, Élida Gonçalves; Ferreira, Laís Dias; Bica, Clara Isméria Damiani; Rodrigues, Silvia Rosane Santos; Nachtigall, Sônia Marlí Bohrz

doi:10.1590/0104-1428.1840

Cited by 15 publications

(8 citation statements)

References 24 publications

(28 reference statements)

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“…The degree of crystallinity of the specimens increased from 42.5% to 49.6% up to third cycle, but it decreased to 38.6% from the third to the seventh cycle. High crystallization temperature and crystallinity are interesting properties for thermoplastic processors since they reduce the production time, saving costs (Taflick et al 2015). As the WPCs were injected three times, the second melting enthalpy increased from 59.8 to 70.6 J/g, but it decreased to 56.2 J/g as the number of the reinjection cycles was increased from three to seven.…”

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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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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“…Extensive knowledge has been developed for short/long fibre reinforced thermoplastic composites on the optimization and processing of product performance [19] . However, the development of continuous and woven fabric reinforced composites is still not up to the mark.…”

Section: Introductionmentioning

confidence: 99%

Investigation on influence of stamp forming parameters on formability of thermoplastic composite

Suresh

Kumar

2018

Polímeros

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Advanced fabric reinforced polymer composites find extensive applications in aerospace and structural fields due to their high mechanical properties. A novel stamp forming technique finds extensive use in the hemispherical forming of thermoplastic composites. This study investigates the influence of stamp forming parameters on the formability of thermoplastic composite using Taguchi's robust design and grey relational analysis. Taguchi's orthogonal array was used for designing the forming experiments. Responses such as forming ratio and logarithmic thickness strain were considered for the assessment of sheet formability through single and multi-response optimization. Analysis of variance was used for the determination of the contribution of each parameter on formability and it was identified that the die temperature acts as a prominent factor, followed by blank holder force and blank temperature. The confirmation test was conducted at optimum parameter levels and the obtained experimental grade was seen within the confidence interval of the predicted value.

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“…Over time, the swelling and shrinking of WPCs creates microcracks that allow biological degradation by decay fungi, termites, molds, algae, and marine borers (Hosseinaei et al 2012;Samaniego et al 2013;Tascioglu et al 2013). Among the various modification methods used to enhance the biological durability and dimensional stability of wood, heat treatment has recently gained industrial importance (Correa et al 2003;Tschegg et al 2009), but there is very limited information about the heat treatment of alder wood (Alnus glutinosa L.). Alder is one of the most important tree species in Turkey; it is a fast growing species that spreads over a wide area of the country (Huş 1962).…”

Section: Introductionmentioning

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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Acacia bark residues as filler in polypropylene composites

Cited by 15 publications

References 24 publications

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

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

Investigation on influence of stamp forming parameters on formability of thermoplastic composite

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

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