Effects of Antioxidants Content on the Physical and Mechanical Properties of Wood Plastic Composites

We investigated the effects of amount of antioxidants variability on selected mechanical and physical properties of wood plastic composites. Recycled high density polyethylene (rHDPE) and natural fibers were compounded into pellets by compounder, then the pellets were extruded using co-rotating twin-screw extruder and test specimens were prepared by hot and cold press process. From the study, samples with 0.5 wt% of antioxidants produce the highest strength and elasticity of composites. The effect of antioxidants presence on water uptake is minimal.

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Effects of Premixing Wood Flour with Compatibilizer with Different Characteristics on the Physical and Mechanical Properties of Wood/Plastic Composites

Forest Products Journal ◽

10.13073/fpj-d-18-00040 ◽

2019 ◽

Vol 69 (2) ◽

pp. 141-147

Author(s):

Kazushige Murayama ◽

Yoichi Kojima ◽

Hikaru Kobori ◽

Kenji Aoki ◽

Shigehiko Suzuki ◽

...

Keyword(s):

Mechanical Properties ◽

Molecular Weight ◽

Physical Properties ◽

Shear Viscosity ◽

Wood Flour ◽

Physical And Mechanical Properties ◽

Plastic Composites ◽

Mechanical And Physical Properties ◽

One Step ◽

Mixing Method

Abstract The addition of maleic anhydride (MA)-modified polypropylene (MAPP) as a compatibilizer increases mechanical and physical properties of wood/plastic composites (WPCs). It is thought that MA graft ratio (Gr), molecular weight (weight-average molecular weight [Mw]), and mixing methods of MAPP affect physical and mechanical properties of WPCs. However, evaluation, especially for mixing order, is not enough. The objective of this study was to investigate the effect of Gr and Mw of MAPP and its mixing methods on the mechanical and physical properties of WPCs. Two types of mixing methods were used: mixing the MAPP with the filler using a Henschel mixer before kneading with PP (premixing method) and mixing all of the materials at one time (one-step mixing method). The WPCs made with the premixing method had lower shear viscosity and higher flexural modulus than those made with the one-step mixing method. The particle size, moisture content, and surface morphology of fillers are thought to be more important in determining the shear viscosity of WPCs than the MAPP itself. The highest tensile, impact, and flexural strengths of WPCs were obtained in the WPC with premixing with low-Gr and high-Mw MAPP. It may be due to the effective reaction of the wood flour with MAPP and higher entanglement between the MAPP and PP. These results suggest that the premixing method could improve productivity and mechanical properties of WPCs.

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PEMANFAATAN KAYU AKASIA MANGIUM (Acacia mangium Willd) UNTUK MEBEL

Jurnal Riset Industri Hasil Hutan ◽

10.24111/jrihh.v4i1.1195 ◽

2012 ◽

Vol 4 (1) ◽

pp. 1

Author(s):

Djoko Purwanto

Keyword(s):

Mechanical Properties ◽

Compressive Strength ◽

Physical Properties ◽

Treatment Process ◽

Acacia Mangium ◽

Physical And Mechanical Properties ◽

Wood Fibers ◽

Test Parameters ◽

Mechanical And Physical Properties ◽

Scale Scores

Timber Acacia mangium (Acacia mangium, Willd) for Furniture. The study aims to determine the mechanical and physical properties and the decorative value (color and fiber) wood of acacia mangium with using finishing materials. This type of finishing material used is ultran lasur natural dof ,ultran lasur classic teak, aqua politur clear dof, aqua politur akasia dan aqua politur cherry. After finishing the wood is stored for 3 months. Test parameters were observed, namely, physical and mechanical properties of wood, adhesion of finishing materials, color and appearance of the fiber, and timber dimensions expansion. The results showed that the mechanical physical properties of acacia wood qualified SNI. 01-0608-89 about the physical and mechanical properties of wood for furniture, air dry the moisture content from 13.78 to 14.89%, flexural strength from 509.25 to 680.50 kg/cm2, and compressive strength parallel to fiber 342.1 - 412.9 kg/cm2. Finishing the treatment process using five types of finishing materials can increase the decorative value (color and fiber) wood. Before finishing the process of acacia mangium wood has the appearance of colors and fibers and less attractive (scale scores 2-3), after finishing acacia wood fibers have the appearance of colors and interesting and very interesting (scale 4-5).Keywords: mangium wood, mechanical properties, decorative value, finishing, furniture.

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PENENTUAN SIFAT MEKANIS DAN FISIS BATU BATA DENGAN PENAMBAHAN ARANG TEMPURUNG KELAPA ASAL ALOR

Jurnal Fisika : Fisika Sains dan Aplikasinya ◽

10.35508/fisa.v3i3.605 ◽

2018 ◽

Vol 3 (1) ◽

pp. 80-85

Author(s):

Ernawati Kawa ◽

Minsyahril Bukit ◽

Albert Zicko Johannes

Keyword(s):

Mechanical Properties ◽

Physical Properties ◽

Compression Strength ◽

Physical And Mechanical Properties ◽

Strength Test ◽

Coconut Shell ◽

Mechanical And Physical Properties ◽

Maximum Limit

Abstrak Telah dilakukan penelitian tentang penentuan sifat mekanis dan fisis batu bata dengan penambahan tempurung kelapa asal alor. Penenlitian ini bertujuan mengetahui kualitas batu bata yang memenuhi standar kelayakan sebagai bahan konstruksi dengan penambahan arang tempurung kelapa aal alor dengan presentasi 0%, 5%, 10%, 15% terhadap tanah liat (lempung). Batu bata dicetak dengan prosedur pemadatan, pengringn dan pembakaran. Setelah prosedur pencetakkan selesai kemudian di lanjutkan dengan pengujian sefat mekanis dan sifat fisis, yaitu uji kuat tekan (compression strength), densitas (density), porositas (porosity) hasil kuat tekan batu bata didapatkan berdasarkan pengujian: a) uji kuat tekan, batu bata tanpa penambahan (0%) : 4,94 meemenuhi standar kuat tekan kelas 50 (SNI 15-2094-2000), b) uji porositas, batu bata 0% dan 5% : 3,82% dan 17,93% memenuhi standar porositas dengan batas maksimum 20% (SNI 15-2094-2000) dan uji densitas, batu bata tidak ada yang memenuhi standar (SII 0021-1978) Kata kunci: sifat mekanis, sifat fisis, tempurung kelapa, densitas, porositas, kuat tekan Abstract A research had been conducted to determine physical and mechanical properties of the bricks with the addition coconut shell charcoal from alor. This research aims at the quality of the bricks to meet the standars of eligibility as a contruction material. The addition of coconut shell charcoal is variate with the presentage 0%, 5%, 10%, 15% to the clay mass. The brick being printed with procedure compaction, drying, and baking. After the printing procedure is done then next is testing the mechanical and physical properties, that is compression strength test, density test, and porosity test. The brick quality result is obtained based on the test: a) compression strength test, the brick without addition (0%) : 4,94 (SNI 15-2094-2000) is comply with the standard compression strength the class 50 , b) porosity test, the brick 0% and 5% (3,82% and 17,93%) meet the standard with the maximum limit 20% ( SNI 15-2094-2000) , and c) density test, every bricks does not meet the standard (SII 0021- 1978). Keywords: mechanical properties, physical properties, coconut shell, density, porosity, compression strength

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Effect of Natural Fiber (NF) Mix on Mechanical Strength of NF Plastic Composites (NFPC)

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.a3043.109119 ◽

2019 ◽

Vol 9 (1) ◽

pp. 5663-5667

Keyword(s):

Mechanical Properties ◽

Impact Strength ◽

Natural Fiber ◽

Fiber Type ◽

Natural Fibers ◽

Natural Fibre ◽

Additional Advantage ◽

Plastic Composites ◽

Twin Screw ◽

The Impact

Natural fibers from plants are gaining importance and may substitute wood in the production of wood plastic composites (WPC). To ensure continuity of fiber supply and sustainability of WPC industries, fibers of various types could be mixed together to obtain Mix WPC. However, research need to be carried out to identify the contribution of different fiber type collectively to the mechanical properties of Mix natural fiber polymer composite (NFPC). In this study, preliminary work on the use of natural fibre (NF) such as kenaf, sugar palm and pineapple leaf fibers in the preparation of Mix NFPC were carried out. Four different fiber mix samples with different fiber ratio and size were formulated using polypropylene (PP) as the polymer matrix. Montmorrilonite (MMT) filler was added at constant amount for enhancement of composite mechanical properties. Samples were mixed and prepared using a twin screw extruder and mini injection moulding resepectively. Individual fibers and NFPC prepared were characterized using thermogravimetric analyzer (TGA). Tensile, flexural and impact strength of the composites were determined. Generally, it was found that addition of fiber mix at 50% fiber loading enhance the tensile and flexural strength of the various NFPC with minimal exceptions. The impact strength of the composites were comparable to that of blank PP implying that addition of fiber gives additional advantage besides being eco-friendly. It was also found that higher kenaf loading and different size of fiber mix contribute positively to the various strengths measured. In addition to that, composition of individual fibers also contribute to the mechanical properties of the NFPCs

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Effect of waterlogging on physical and mechanical properties of Samanea saman (Jacq.) Merr. tree

Bangladesh Journal of Scientific and Industrial Research ◽

10.3329/bjsir.v52i1.32080 ◽

2017 ◽

Vol 52 (1) ◽

pp. 49-52

Author(s):

Elias ◽

AK Das ◽

MM Rahman ◽

MA Islam

Keyword(s):

Mechanical Properties ◽

Physical Properties ◽

Physical And Mechanical Properties ◽

Wood Properties ◽

Dry Density ◽

Waterlogged Area ◽

Mechanical And Physical Properties ◽

Samanea Saman

This research intends to explore the mechanical and physical properties of waterlogged rain tree (Samanea saman). The variation of mechanical and physical wood properties grown in waterlogged and non-waterlogged area were studied. Four trees of the species were selected from two areas. Important mechanical and physical properties were examined for the wood of two types of trees Oven dry density for the wood of waterlogged tree was 420 kg/m3 whether it was 550 kg/m3 for the wood of non-waterlogged tree. The MOR of wood of waterlogged tree was 58.2 N/mm2 and wood of non-waterlogged tree produced 78.1 N/mm2. The MOE of the wood of waterlogged tree and non-waterlogged tree were 1478 and 4876 N/mm2. The physical and mechanical properties were lower for the wood of waterlogged tree. Such findings may in proper uses of the species.Bangladesh J. Sci. Ind. Res. 52(1), 49-52, 2017

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Influence of the Phase Inversion on Mould-Shrinkage, Mechanical- and Burning Properties of Polymer Blend

Materials Science Forum ◽

10.4028/www.scientific.net/msf.885.36 ◽

2017 ◽

Vol 885 ◽

pp. 36-41 ◽

Cited By ~ 1

Author(s):

Károly Dobrovszky ◽

Ferenc Ronkay

Keyword(s):

Physical Properties ◽

Polymer Blends ◽

Tensile Properties ◽

Polymer Blend ◽

Phase Inversion ◽

Viscosity Ratio ◽

Screw Extruder ◽

Binary Polymer ◽

Mechanical And Physical Properties ◽

Twin Screw

Blending polymers is an effective method to develop novel materials, tailoring the properties of the components. However, different morphology structures can be formed during the preparation, which could result in a wide diversity of mechanical and physical properties. The properties of polymer blends are most significantly influenced by the emerging range of phase inversion, which depends on the composition ratio and the viscosity ratio. In this paper various blends were prepared, utilizing polyethylene terephthalate (PET), polystyrene (PS) and two high density polyethylenes (HDPE), which differ in flowability. After preliminary homogenization by twin screw extruder, standard injection moulded specimen were prepared in order to present the effects of phase inversion on tensile properties, shrinkage and burning characteristics in binary polymer blends.

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Mechanical and physical properties of fine-grained concrete for concrete additive manufacturing

E3S Web of Conferences ◽

10.1051/e3sconf/20199102041 ◽

2019 ◽

Vol 91 ◽

pp. 02041

Author(s):

Sergey Udodov ◽

Yuriy Galkin ◽

Philip Belov

Keyword(s):

Mechanical Properties ◽

Additive Manufacturing ◽

3D Printing ◽

Physical Properties ◽

Crucial Role ◽

Physical And Mechanical Properties ◽

Concrete Composition ◽

Fine Grained ◽

Mechanical And Physical Properties ◽

Time Periods

Additive manufacturing (3D printing) is becoming more and more common in the field of modern construction. However, for wider implementation of this technology, it is necessary to solve a number of material-oriented scientific problems related to development of concrete composition with targeted rheological, stress-strain, physical and mechanical properties. It has been established that time periods between successful applications of layers play the crucial role in ensuring monolithic features of the “printed” structures. Application of mathematics planning of the experiment allowed establishing the main principles of formation of basic physical and mechanical properties of fine-grained concrete depending on material composition.

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