Mechanical and Morphological Properties of Meranti Wood Flour Filled Polypropylene Composites

2016 ◽  
Vol 840 ◽  
pp. 91-96 ◽  
Author(s):  
Bashree Abu Bakar ◽  
Mohamad Najmi Masri ◽  
Mohd Hazim Mohamad Amini ◽  
Mazlan Mohamed ◽  
Muhammad Azwadi Sulaiman ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Wood Flour ◽  
Morphological Properties ◽  
Screw Extruder ◽  
Polypropylene Composites ◽  
Plastic Composites ◽  
Twin Screw ◽  
Injection Molded ◽  
Fibre Matrix ◽  
Scanning Electron

Wood plastic composites (WPC) have been produced by compounding meranti wood flour (WF) with polypropylene (PP) copolymer using a twin-screw extruder. The meranti WF content was varied from 30 to 60 wt.%. The mechanical properties, i.e. tensile, flexural and impact of the composites were determined on injection-molded specimens. The tensile fractured surfaces were used to study the morphological properties of the composites. The result shows that the increment in WF content has given a significant improvement in modulus properties but at the expense of strength and toughness properties. A commercial maleic anhydride grafted polypropylene (MAPP) compatibilizer at 5 wt.% was incorporated into the PP40/WF60 formulation. The strength, stiffness and toughness properties were improved significantly in the presence of MAPP. The morphology of the composites was studied by scanning electron microscopy (SEM). The improvement of the fibre-matrix adhesion between the WF and PP matrix as revealed by SEM is believed to be one of the major reasons for the improved mechanical properties.

Influence of Poly(Vinyl Butyral) on the Dynamic-Mechanical and Mechanical Properties of Polypropylene/Wood Flour Composites

2014 ◽  
Vol 775-776 ◽  
pp. 593-598
Author(s):  
Lidiane C. Costa ◽  
José Donato Ambrósio
Keyword(s):  
Mechanical Properties ◽  
Glass Transition ◽  
Loss Modulus ◽  
Wood Flour ◽  
Screw Extruder ◽  
Absorbed Energy ◽  
Dynamic Mechanical ◽  
Twin Screw ◽  
Injection Molded ◽  
Vinyl Butyral

This study reports the influence of recycled poly (vinyl butyral) (PVB) in dynamic mechanical and mechanical properties of polypropylene (PP)/wood flour composites prepared in a twin screw extruder. After extrusion, the PP/wood flour composites were injection molded to obtain specimens for tensile, flexural, impact and dynamic mechanical (DMA) tests. The morphology of the composites was analyzed by scanning electron microscopy (SEM). The addition 10 wt% of PVB in PP/wood flour composite reduced from 5°C to-10°C the β transition (glass transition) peak temperature of the loss modulus. In a temperature range between 40°C and 100°C the composites containing PVB presented the highest peak in the loss modulus. The most intense tan delta peaks between 50°C and 100°C for composites containing PVB were attributed to the combined effects of PP α transition with the PVB glass transition temperature. The PP/wood flour composites with PVB presented a tendency to increase the absorbed energy by impact.

INNOVATIVE MANUFACTURING OF CARBON NANOTUBE-LOADED FIBRILLAR POLYMER COMPOSITES

2010 ◽  
Vol 24 (15n16) ◽  
pp. 2459-2465 ◽  
Author(s):  
R. J. T. LIN ◽  
D. BHATTACHARYYA ◽  
S. FAKIROV
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Polymer Composites ◽  
Polyamide 66 ◽  
Screw Extruder ◽  
Enhancing Effect ◽  
The Matrix ◽  
Twin Screw ◽  
New Type ◽  
Scanning Electron

The concept of microfibrillar composite (MFC) has been used to create a new type of polymer composites, in which the reinforcing microfibrils are loaded with carbon nanotubes (CNT). Polyamide 66 (PA66) has been melt blended with polypropylene in a twin screw extruder with and without CNT, and thereafter cold drawn to create a fibrillar state as well as to align the CNT in the PA66 microfibrils. The drawn bristles were compression moulded at 180°C to prepare MFC plates. The scanning electron microscope (SEM) observations indicate near perfect distribution of CNT in the reinforcing PA66 microfibrils. Although the fibrillated PA66 is able to improve the tensile stiffness and strength as expected from the MFC structure, the incorporation of CNT does not exhibit any further enhancing effect. It rather adversely affects the mechanical properties due to poor interface adhesion between the matrix and the reinforcing microfibrils with the presence of CNT, as demonstrated by SEM. However, the resulting highly aligned CNT within the MFC are expected to affect the physical and functional properties of these composites.

Effect of Compatibilizer Content on the Mechanical and Morphological Properties of PET/PP (70/30) Blends

2015 ◽  
Vol 735 ◽  
pp. 70-74
Author(s):  
Ibrahim Mohammed Inuwa ◽  
Azman Hassan ◽  
Sani Amril Samsudin
Keyword(s):  
Mechanical Properties ◽  
Triblock Copolymer ◽  
Standard Test ◽  
Morphological Properties ◽  
Screw Extruder ◽  
Elongation At Break ◽  
Young’S Moduli ◽  
Morphological Studies ◽  
Twin Screw ◽  
Pp Blends

This work investigates the effect of compatibilizer concentration on the mechanical properties of compatibilized polyethylene terephthalate (PET) /polypropylene (PP) blends. A blend containing 70 % (wt) PET, 30 % (wt) PP and 5 - 15 phr compatibilizers were compounded using counter rotating twin screw extruder and fabricated into standard test samples using injection molding. The compatibilizer used is styrene-ethylene-butylene-styrene grafted maleic anhydride triblock copolymer (SEBS-g-MAH). Morphological studies show that the particle size of the dispersed PP phase is dependent on the compatibilizer content up to 10 phr. Impact strength and elongation at break showed maximum values with the addition of 10 phr SEBS-g-MAH and a corresponding decrease in flexural and young’s moduli; and strengths.. Overall the mechanical properties of PET/PP blends depend on the control of the morphology of the blend and can be achieved by effective compatibilization using 10 phr SEBS-g-MAH.

Effect of Compatibilizers on Mechanical Thermal and Morphology Properties of HDPE/TiO2 Nanocomposites

2010 ◽  
Vol 93-94 ◽  
pp. 169-172
Author(s):  
N. Wiriyanukul ◽  
S. Wacharawichanant
Keyword(s):  
Tensile Strength ◽  
Electron Microscope ◽  
High Density Polyethylene ◽  
Morphological Properties ◽  
Screw Extruder ◽  
Melt Mixing ◽  
Before And After ◽  
Twin Screw ◽  
Dispersion Of Nanoparticles ◽  
Scanning Electron

This work studies the effect of PE-g-MA compatibilizer on mechanical thermal and morphological properties of high density polyethylene (HDPE)/titanium dioxide (TiO2) nanocomposites. The HDPE/TiO2 nanocomposites with and without PE-g-MA compatibilizer were prepared by melt mixing technique in a twin screw extruder. The results found that Young's Modulus of HDPE/TiO2 nanocomposites increased with increasing TiO2 contents. The addition of PE-g-MA compatibilizer had no significant effect on the tensile strength and stress at break of HDPE/TiO2 nanocomposites. The decomposition temperatures of HDPE/TiO2 nanocomposites before and after adding PE-g-MA compatibilizer increased with increasing TiO2 contents. The dispersion of TiO2 nanoparticles in HDPE matrix was observed by scanning electron microscope (SEM). The dispersion of nanoparticles in HDPE matrix with PE-g-MA compatibilizer was relatively good, only a few aggregates exited.

Mechanical and Interfacial Properties of Hydrolyzed Kevlar Fiber Reinforced Wood Flour/HDPE Composites

2011 ◽  
Vol 221 ◽  
pp. 27-31 ◽  
Author(s):  
Rong Xian Ou ◽  
Qing Wen Wang ◽  
Fei Pin Yuan ◽  
Bao Yu Liu ◽  
Wei Jun Yang
Keyword(s):  
Mechanical Properties ◽  
Wood Flour ◽  
Flexural Modulus ◽  
Tensile Modulus ◽  
Screw Extruder ◽  
Kevlar Fiber ◽  
Single Screw ◽  
Single Screw Extruder ◽  
Twin Screw ◽  
Matrix Morphology

Hydrolyzed Kevlar fibers (KFs) were compouded into high-density polyethylene (HDPE) with wood flour (WF) by twin-screw/single-screw extruder to investigate the reinforcement effects of KFs on the mechanical properties of conventional WF/HDPE composites. Maleated HDPE (MAPE) was used as a compatibilizer. The mechanical properties significantly improved as the KFs loading increases in the presence of 4% MAPE, such as tensile strength 14.7%, tensile modulus 12.4%, flexural strength 22.2%, flexural modulus 22.4%, and impact strength 41.7% with 2 wt.% KFs compared to WF/HDPE composite with MAPE. The fiber matrix morphology of the interface region in the composites was examined using scanning electron microscopy (SEM).

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

2011 ◽  
Vol 471-472 ◽  
pp. 151-156 ◽  
Author(s):  
Mohd Hafizuddin Ab Ghani ◽  
Ahmad Haji Sahrim
Keyword(s):  
Mechanical Properties ◽  
Physical Properties ◽  
High Density Polyethylene ◽  
Natural Fibers ◽  
Physical And Mechanical Properties ◽  
Screw Extruder ◽  
Wood Plastic Composites ◽  
Plastic Composites ◽  
Mechanical And Physical Properties ◽  
Twin Screw

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.

The interaction of delignification and fiber characteristics on the mechanical properties of old corrugated container fiber/polypropylene composite

2017 ◽  
Vol 24 (1) ◽  
pp. 35-40
Author(s):  
Pouria Rezaee Niaraki ◽  
Ahmad Jahan Latibari ◽  
Arash Rashno ◽  
Ajang Tajdini
Keyword(s):  
Mechanical Properties ◽  
Lignin Content ◽  
Strength Properties ◽  
Screw Extruder ◽  
Polypropylene Composite ◽  
Polypropylene Composites ◽  
Twin Screw ◽  
Soda Pulping ◽  
Reducing Stress ◽  
Made In

AbstractThe effect of fiber characteristics from old corrugated container (OCC) paper on the strength properties of OCC/polypropylene composites was evaluated. Fibers with different contents of lignin (2.8%, 3.8%, 5.3%, and 7%) were produced using soda pulping. Wettability, tear, and tensile strength of the fibers were measured as the indication factors to assess the strength of reinforcing component in the composites. The weight portions of the OCC fibers, polypropylene, and maleic anhydride-grafted polypropylene (MAPP) were selected at 20%, 77%, and 3% of the total weight of the composite, respectively. The composite compounds were formed using a counter-rotating twin screw extruder, and the specimens were made in an injection molding machine. The interaction of fiber characteristics and fiber lignin content on the mechanical properties of composite was investigated. The results revealed that with lower fiber lignin content, both flexural and tensile properties were increased. Consequently, by forming better fiber dispersion and by reducing stress regions in the composite, impact strength was also improved. Lower lignin content resulted in better mechanical properties than fiber characteristics.

scholarly journals Selected properties of mahogany wood flour filled polypropylene composites: The effect of maleic anhydride-grafted polypropylene (MAPP)

BioResources ◽  
2020 ◽  
Vol 15 (2) ◽  
pp. 2227-2236
Author(s):  
Vedat Çavuş
Keyword(s):  
Mechanical Properties ◽  
Maleic Anhydride ◽  
Wood Flour ◽  
Zinc Stearate ◽  
Test Results ◽  
Composite Manufacturing ◽  
Polypropylene Composites ◽  
Tensile Impact ◽  
Interfacial Compatibility ◽  
Scanning Electron

The aim of this study was to produce mahogany (Swietenia macrophylla) wood flour filled polypropylene (both recycled and virgin) composites and to determine the effects of maleic anhydride-grafted polypropylene (MAPP) on the interfacial compatibility, density, and other mechanical properties of the resulting composites. Approximately 40 wt% of mahogany wood flour, and 60 wt% of polypropylene, 3 wt% of MAPP, 1.5 wt% of zinc stearate, and 1.5 wt% of wax were used during composite manufacturing. Test specimens were manufactured using extrusion and injection molding processes. The flexural, tensile, impact, and hardness properties of all specimens were determined. Scanning electron microscopy was used to study the morphology and interfacial compatibility of the filler in prepared composites. The test results showed that MAPP use and the filler rates affected the density and mechanical properties of test specimens.

Effects of Fiber Mass Fraction and Alkali Concentration on Mechanical Properties of Biodegradable Composites

2010 ◽  
Vol 152-153 ◽  
pp. 1677-1682
Author(s):  
Zhi Yong Qin ◽  
Yi Qiang Wu ◽  
Xin Gong Li ◽  
Yan Qing
Keyword(s):  
Mechanical Properties ◽  
Mass Fraction ◽  
Alkali Treatment ◽  
Wood Fiber ◽  
Alkali Concentration ◽  
Molding Machine ◽  
Screw Extruder ◽  
Biodegradable Composites ◽  
Twin Screw ◽  
Scanning Electron

Biodegradable composites of polylactic acid reinforced with wood fiber are fabricated by using twin screw extruder followed by the injection molding machine. The effects of fiber mass fraction and alkali concentration on mechanical properties of biodegradable composites are investigated. The results show that the mechanical properties of biodegradable composites presented tendency which reduced first, elevated, and again reduced along with fiber mass fraction increased, after the alkali treatment, the mechanical properties of biodegradable composites have the tendency which increased first and then reduced, when the concentration of alkali solution is 8%, both the tensile strength and impact strength are best. The scanning electron microscope and Infrared Spectrum Analysis are also used for examination of biodegradable composites.

Composites of Acrylonitrile-Butadiene-Styrene Filled with Wood-Flour

2007 ◽  
Vol 15 (5) ◽  
pp. 365-370 ◽  
Author(s):  
L.M. Matuana ◽  
S. Cam ◽  
K.B. Yuhasz ◽  
Q.J. Armstrong
Keyword(s):  
Mechanical Properties ◽  
Wood Flour ◽  
Acrylonitrile Butadiene Styrene ◽  
Wood Plastic Composites ◽  
Plastic Composites ◽  
Twin Screw ◽  
Rigid Pvc ◽  
Impact Modification ◽  
The Impact ◽  
Butadiene Styrene

This study examined both the use of acrylonitrile-butadiene-styrene (ABS) as a plastic matrix for wood-plastic composites (WPCs) and the effect of impact modification on the mechanical properties of ABS/wood-flour composites. Blends of ABS filled with wood flour (both pine and maple) were processed into profile shape using a conical twin-screw extruder and the mechanical properties of the resulting composites were characterised and compared to WPCs made with polyolefins (HDPE and PP) and rigid PVC matrices. Generally, WPCs made with ABS matrix outperformed their polyolefin counterparts in both flexural strength and modulus, whereas ABS-based composites had inferior strength but greater modulus than those made with rigid PVC. The impact strength of ABS/wood-flour composites was below that of wood plastic composites made with polyolefins. However, impact modification with acrylonitrile-butadiene-styrene terpolymers had some effect in toughening of the ABS/wood-flour composites.

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