Physic-Mechanical Properties of Composites Based on Secondary Polypropylene and Dispersed of Plant Waste

2020 ◽  
Vol 1006 ◽  
pp. 227-232
Author(s):  
Yuliya Danchenko ◽  
Artem Kariev ◽  
Vladimir Lebedev ◽  
Elena Barabash ◽  
Tatyana Obizhenko
Keyword(s):  
Mechanical Properties ◽  
Bending Strength ◽  
Wood Flour ◽  
Chemical Properties ◽  
Uniform Structure ◽  
Internal Stresses ◽  
Agricultural Plants ◽  
Oat Husk ◽  
Filled Composite ◽  
Properties Of Composites

The physic-mechanical properties of filled composites based on secondary polypropylene are investigated. As fillers the dispersed wastes of processing of agricultural plants - buckwheat and oat husk, as well as needles flour and wood flour were used. Water absorption, abrasion, impact strength and bending strength of composites were investigated. It has been proven that oat and buckwheat husks can be effectively used in composites based on secondary polypropylene and replace traditional wood fillers. It has been shown that the physic-chemical properties of the filled composites depend on the structure and physicochemical interactions on the phase separation surface, as well as on the surface properties of the filler particles. It is established that for the production of filled composites with improved physic-mechanical characteristics it is necessary to use fillers with small specific surface and concentration of surface functional groups, and the acid-base characteristic of the surface should be closer to neutral. It is shown that these conditions provide for the formation of a uniform structure of the filled composite with less internal stresses.

Preparation and Properties of Wood Flour/HDPE Composites Using C5-g-MAH as Compatilizer

2013 ◽  
Vol 779-780 ◽  
pp. 170-173
Author(s):  
Lan Cen ◽  
Fu Lin Chen ◽  
You Ming Cao ◽  
Hui Xue Chen
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
High Density Polyethylene ◽  
Wood Flour ◽  
Bend Strength ◽  
Grafting Ratio ◽  
Melt Grafting ◽  
Compatibilizing Effect ◽  
Morphology And Mechanical Properties ◽  
Properties Of Composites

Maleic anhydride grafted C5 petroleum resin (C5-g-MAH) was prepared using peroxide as an initiator by melt grafting process, and was incorporated as a compatibilizer into Wood Flour/High Density Polyethylene (WF/HDPE) composites. The effect of second monomers and C5-g-MAHs on the morphology and mechanical properties of composites was investigated. Results showed that the presence of a second monomer, Triallyl isocyanurate (TAI), Butyl acrylate (BA) or Trimethylol proane trimethacrylate (TMPTMA), in the grafting system gave rise to higher grafting ratio of C5-g-MAHs compared to that without a second monomer. The highest grafting ratio was obtained as TMPTMA content being 0.20~0.35wt% based on C5. The addition of C5-g-MAHs into WF/HDPE resulted in improved mechanical properties. Meanwhile the composite containing C5-g-MAH with 0.30wt% TMPTMA exhibits the most significant improvement in all mechanical properties with tensile strength and bend strength increasing up to 18% and 20% respectively, which is concomitant with the finer morphology structure observed by SEM, suggesting the remarkable compatibilizing effect of C5-g-MAH with TMPTMA for WF/HDPE composites.

Microstructure and Mechanical Properties of AlN Particle Reinforced Mg-Al Matrix Composites with Different Particle Contents

2018 ◽  
Vol 913 ◽  
pp. 522-528 ◽  
Author(s):  
Yong Wang ◽  
Kai Ming Cheng ◽  
Ji Xue Zhou ◽  
Wei Hong Li ◽  
Jin Huan Xia
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Load Transfer ◽  
Bending Strength ◽  
Energy Dispersive Spectrometer ◽  
Testing Machine ◽  
Matrix Alloy ◽  
Strengthening Mechanism ◽  
Al Matrix Composites ◽  
Properties Of Composites

In this paper, magnesium matrix composite with different AlN particles content were fabricated by powder metallurgy. The microstructure of composites was investigated by scanning electron microscopy (SEM) equipped with energy dispersive spectrometer (EDS) and transmission electron microscopy (TEM). The mechanical properties of composites were measured by electronic universal testing machine. The results show that the best densification and the highest mechanical properties of composites reached when the addition of 6wt.% reinforcement at 620 °C for 1 hour. Additionally, the compressive strength and bending strength of composites were 217.06 MPa and 207.40 MPa respectively, increased by 79.2% and 91.12% compared with matrix alloy, and the reinforcement particles uniformly distributed in the matrix alloy. It may be concluded that the strengthening mechanism of composites is mainly attributed to grain refinement, load transfer, and dislocation strengthening.

Effect of Different Kinds of CaSO4 Whisker on the Bending Strength and Hygroscopicity of Gypsum Board

2014 ◽  
Vol 638-640 ◽  
pp. 1322-1325 ◽  
Author(s):  
Chang Chen ◽  
Yu Bin Wang ◽  
Hua Wang ◽  
Qian Qian Deng ◽  
Lei Du ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Calcium Sulfate ◽  
Bending Strength ◽  
Gypsum Board ◽  
Specific Strength ◽  
Different Types ◽  
Calcination Method ◽  
Calcium Sulfate Whiskers ◽  
Calcium Sulfate Whisker ◽  
Properties Of Composites

Different kinds of hemihydrate calcium sulfate whiskers were fabricated by calcination method under the condition of 115-600 °C. And the density, moisture rate and mechanical properties of composites of gypsum and whisker were studied. The specific strength of composites was investigated. The results show that gypsum boards with whisker calcined at 115 °C and 300 °C have the maximum and minimum densities, which are about 1658 kg/m3 and 1604 kg/m3, respectively. Hydration ability of anhydrous calcium sulfate whisker is the strongest. The values of specific strength of gypsum board reinforced by different types of whiskers suggested that the porosity of the composites changed with the different kinds of whiskers, which agreed well with the moisture rate and mechanical properties.

Surface Modification of Silicon Nano Mechanical Structures by Carbon Ion Implantation for Post-fabrication Transformation to Silicon Carbide

2005 ◽  
Vol 908 ◽  
Author(s):  
Kumar R Virwani ◽  
Dinesh K Sood ◽  
Robert G Elliman ◽  
Ajay P Malshe
Keyword(s):  
Mechanical Properties ◽  
Silicon Carbide ◽  
Surface Modification ◽  
Chemical Composition ◽  
Ion Implantation ◽  
Bending Strength ◽  
Internal Stresses ◽  
Carbon Ions ◽  
Carbon Ion ◽  
Unique Ability

AbstractInternal stresses can cause de-lamination and fracture of coatings and structures and it is well known that ion-implantation can be used to control such behavior through modification of the stress. Here, however, we show that the unique ability of implantation to create controlled stresses in materials by altering both the chemical composition and mechanical properties, combined with an increase in the bending strength of materials, can used to create novel vertical nanostructures. Silicon cantilevers (beams), 193nm thick, 200nm wide and 3μm long, were implanted with carbon ions to create a buried SiCx layers. The internal stresses generated by implantation caused the beams to bend at angles ranging from 10 degrees to greater than 90 degrees, leading to unique vertical nanostructures. This method can be used to create 3-D nano electromechanical systems (NEMS).

Preparation and Properties of Ti5Si3 Matrix Composites Reinforced by Carbon Nanotube

2010 ◽  
Vol 105-106 ◽  
pp. 195-198
Author(s):  
Xin Fang Cui ◽  
Shuang Quan Fang ◽  
Ying Jie Qiao ◽  
Qi Jia
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Bending Strength ◽  
Matrix Composites ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron Microcopy ◽  
Main Fracture ◽  
Hot Pressing Sintering ◽  
Properties Of Composites

Ti5Si3 matrix composites reinforced by carbon nanotubes were fabricated by vacuum hot pressing sintering. X-ray diffraction and scanning electron microcopy were carried out to analyze the phase and microstructure of the composites. The effects of carbon nanotubes on mechanical properties were investigated. Experimental results showed that the nanotubes partly reacted with Ti and Si powders to obtain Ti5Si3 and Ti3SiC2, TiSi2 when the sintering temperature is about 1380oC. The mechanical properties of composites can be affected by carbon nanotubes. Meanwhile, the maximal increments of Vickers hardness, bending strength and fracture toughness of the composites, compared with the Ti5Si3 matrix, were 62.9%, 160.9% and 159.3%, respectively. Both of transgranular and intergranular fracture in the composites were the main fracture mode. The fracture manners of composites mainly include “bridging” of CNTs, “deflection” of minor phases and the evolution of grain.

scholarly journals Enhanced Mechanical Properties and Microstructure of Accumulative Roll-Bonded Co/Pb Nanocomposite

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1190
Author(s):  
Maryam Karbasi ◽  
Eskandar Keshavarz Alamdari ◽  
Elahe Amirkhani Dehkordi ◽  
Zulfiqar A. Khan ◽  
Fariborz Tavangarian
Keyword(s):  
Mechanical Properties ◽  
Plastic Deformation ◽  
Particle Size ◽  
Tensile Strength ◽  
Severe Plastic Deformation ◽  
Chemical Properties ◽  
Uniform Structure ◽  
Roll Bonding ◽  
Grain Sizes ◽  
And Chemical Properties

Lead composites have been used as anodes in the electrowinning process to produce metals such as copper and zinc. Manufacturing stable lead anodes with appropriate mechanical and chemical properties is required to improve the performance of the electrowinning process. In this study, an accumulative roll bonding (ARB) method was used to fabricate a Co/Pb nanocomposite. Utilizing the ARB method can help us to achieve a uniform structure with enhanced mechanical properties via severe plastic deformation. The results showed that suitable tensile properties were obtained in Pb–0.5%Co–10pass samples. The tensile strength and strain of these samples were 2.51 times higher and 83.7% lower than that of as-cast pure Pb. They also showed creep resistance and hardness up to 1.8 and 2.5 times more than that of as-cast pure Pb. The ARB technique uniformly distributed Co particles in the Pb matrix. The enhanced strength of Pb samples was observed in the composite including grain sizes of less than 50 nm as a result of hindering the recovery phenomenon. The particle size of the Co distributed in the Pb matrix was 353 ± 259 nm. Compared to conventional methods, the ARB process improved the mechanical properties of Co/Pb composites and can open a new horizon to fabricating this composite in metal industries.

The Molding Technology of Manufacturing Waste Blend Fiber Composites by Mixed Hotpressing

2011 ◽  
Vol 331 ◽  
pp. 699-702
Author(s):  
Li Hua Lv ◽  
Guang Jian Wan ◽  
Yong Ling Yu
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Energy Absorption ◽  
Bending Strength ◽  
Fiber Composites ◽  
Optimum Conditions ◽  
Blend Fiber ◽  
Properties Of Composites

For the waste polyester/cotton/hemp blend fiber of largest abandoned number,this paper designed and optimized the molding technology of manufacturing waste blend waste composites by mixed hotpressing,and analyzed the mechanical properties of composites. Through the orthogonality experiment,the optimum conditions were given as follows:the ratio of waste blend fabrics 1:1,the Concentration of PP 60%,the temperature of hotpressing 185°C，the hotpressing pressure 12Mpa, the hotpressing time 5min. Under above conditions,the composites had the density 0.9326g/cm2,the tensile strength 45.37Mpa, the bending strength 48.31Mpa and the energy absorption of impact 15.32 KJ/m2.

The Influence of Diatomite Types and Compatibilizer Content on Properties of Diatomite-Wood Flour/Polypropylene Composites

2013 ◽  
Vol 448-453 ◽  
pp. 1363-1368 ◽  
Author(s):  
Ming Li Liu ◽  
Guo Zhi Han ◽  
Yan Long Liu ◽  
Chun Feng Li
Keyword(s):  
Mechanical Properties ◽  
Wood Flour ◽  
Flow Property ◽  
Wood Plastic Composite ◽  
Screw Extruder ◽  
Polypropylene Composites ◽  
Plastic Composite ◽  
Single Screw Extruder ◽  
Reinforcing Material ◽  
Properties Of Composites

Based on diatomite as modifier, maleic anhydride grafted polypropylene as compatibilizer, wood flour as reinforcing material, through single screw extruder, diatomite based wood plastic composite was prepared. The results show that: compared with one-grade-diatomite (OGD) and two-grade-diatomite (TGD), mechanical properties of the composites prepared by calcined diatomite (CD) are better, tensile strength and impact strength reached 46.9MPa and 20.1MPa. With respect to the diatomite types, it is more significant for the effects of MAPP mass on the mechanical properties of composites. The amount of MAPP was controlled in 4%, the mechanical properties of composites are better. The study of rheological properties showed that, the flow property of composites produced by calcined diatomite is better; the interface of the composite components is closer and more superior processability.

Effect of Ti3SiC2 Content on Mechanical Properties of Ti5Si3-TiC-Ti3SiC2 Composites

2007 ◽  
Vol 336-338 ◽  
pp. 1383-1385 ◽  
Author(s):  
Chao Qin ◽  
Lian Jun Wang ◽  
Sheng Qiang Bai ◽  
Wan Jiang ◽  
Li Dong Chen
Keyword(s):  
Electron Microscopy ◽  
Mechanical Properties ◽  
Room Temperature ◽  
Bending Strength ◽  
Molar Ratio ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Scanning Electron ◽  
Properties Of Composites

Ti5Si3-TiC-Ti3SiC2 composites containing different Ti3SiC2 volume fractions from 0 to 50% were in-situ fabricated by spark plasma sintering using Ti and SiC powders through adjusting the molar ratio of Ti to SiC. The morphologies of the fracture surfaces were analyzed by scanning electron microscopy (SEM). The room temperature mechanical properties of composites including hardness, bending strength and fracture toughness were tested.

The Technology of Manufacturing Waste Fiber and Flame Retardant TPU Composites by Mixed Hotpressing

2012 ◽  
Vol 518-523 ◽  
pp. 3557-3560
Author(s):  
Fei Fei Chi ◽  
Yong Ling Yu ◽  
Li Hua Lv
Keyword(s):  
Heat Transfer ◽  
Mechanical Properties ◽  
Heat Transfer Coefficient ◽  
Hot Pressing ◽  
Bending Strength ◽  
Fiber Composite ◽  
Orthogonal Experiment ◽  
Optimum Conditions ◽  
Blend Fiber ◽  
Properties Of Composites

For the large number of waste cotton/hemp blend fiber, the molding technology of manufacturing waste blend composites was designed and optimized by mixed hot pressing in this paper, and the mechanical properties of composites were analyzed. Through the orthogonal experiment, the optimum conditions were given as follows: cotton, hemp, TPU fiber composite: the ratio of waste blending fiber 40:60,hotpressing temperature180°C，the concentration of TPU 60%,hotpressing pressure 10Mpa,.The density of composite made by this condition was1.220 g/cm2. Under above conditions, the composites had the density 1.220g/cm2, the tensile strength32.30Mpa, the bending strength 28.51Mpa and the energy absorption of impact 37.25 KJ/m2, heat transfer coefficient 0.0018W/M•K.

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