Investigations into the mechanical, morphological and thermal analyses of friction stir processing of high-density polyethylene composites

2016 ◽  
Vol 232 (7) ◽  
pp. 1193-1200 ◽  
Author(s):  
Jicheng Gao ◽  
Chao Li ◽  
Yifu Shen
Keyword(s):  
Tensile Strength ◽  
Friction Stir Processing ◽  
High Density Polyethylene ◽  
Thermal Analyses ◽  
Experimental Tests ◽  
Traverse Speed ◽  
High Density ◽  
Scanning Calorimetry ◽  
Friction Stir ◽  
Polyethylene Composites

The aim of this work is to fabricate the high-density polyethylene–copper composites by submerged friction stir processing at different traverse speeds. The scanning electron microscopy is used to analyze the distribution of microstructure and particles. The experimental results indicated that the macrostructure morphology, microstructure and tensile strength vary depending on the traverse speed. Compared with the pure high-density polyethylene, Cu-filled polymer composites showed lower tensile strength and higher microhardness. The maximal values of the tensile strength and microhardness were achieved at traverse speeds of 30 and 15 mm/min, respectively. The thermal properties of Cu-filled high-density polyethylene composites were studied by differential scanning calorimetry. The crystalline content of the composites was decreased due to the addition of copper. From the experimental tests, it can be concluded that submerged fiction stir processing has a great potential for producing polymer–metal composites.

Fabrication of high-density polyethylene/multiwalled carbon nanotube composites via submerged friction stir processing

2016 ◽  
Vol 30 (2) ◽  
pp. 241-254 ◽  
Author(s):  
Jicheng Gao ◽  
Yifu Shen ◽  
Chao Li
Keyword(s):  
Thermal Properties ◽  
Friction Stir Processing ◽  
Rotational Speed ◽  
High Density Polyethylene ◽  
Traverse Speed ◽  
High Density ◽  
Mechanical And Thermal Properties ◽  
Scanning Calorimetry ◽  
Multiwalled Carbon ◽  
Friction Stir

The focus of this work was to study the effect of multiwalled carbon nanotubes (MWCNTs) on morphology, mechanical, and thermal properties of high-density polyethylene (HDPE) nanocomposites. MWCNTs/HDPE nanocomposites were prepared using submerged friction stir processing (SFSP) technique. The pristine MWCNTs without any pretreatment were blended with HDPE at a fixed traverse speed of 30 mm min−1 and various rotational speeds ranging from 1200 r min−1 to 2100 r min−1. The effect of rotational speed on MWCNTs dispersion in HDPE matrix was assessed using scanning electron microscopy. The experimental results showed the rotational speed affected the disperision of the MWCNTs. The mechanical properties of the composites were measured, and the results indicated that the tensile strength increased at first and then decreased with the increase of the rotation speed. The thermal properties of MWCNTs-filled HDPE nanocomposites were studied by differential scanning calorimetry, and the crystalline content of the prepared composites by the SFSP technology was increased. From the experimental research, it was found that the SFSP technique was a practical way to fabricate polymeric composites.

Fabrication of HDPE composites via a novel friction stir processing technology

2018 ◽  
Vol 32 (10) ◽  
pp. 1305-1318
Author(s):  
Jicheng Gao ◽  
Xixi Cui ◽  
Yifu Shen ◽  
Liang Yu
Keyword(s):  
Tensile Strength ◽  
Surface Layer ◽  
Friction Stir Processing ◽  
High Density Polyethylene ◽  
Processing Parameters ◽  
High Density ◽  
Processing Technology ◽  
Friction Stir ◽  
The Matrix

In this article, the feasibility of preparing high-density polyethylene (HDPE)/copper (Cu) composites by submerged friction stir processing was investigated. The results showed that the Cu powders were dispersed with the flow of matrix in the action of stir. The surface layer of the composites was more uniform than core, and the advancing side was more homogenous than retreating side. The crystalline content of HDPE/Cu composites was higher than the processing materials without Cu powders. Compared with the matrix, the tensile strength of composites was lower, however, higher than that processing samples under the same processing parameters. The microhardness of composites was higher than either the matrix of the sample without Cu powders.

Tensile and flammability characterizations of corn straw slagging/high-density polyethylene composites

2019 ◽  
Vol 33 (11) ◽  
pp. 1466-1477
Author(s):  
Qingfa Zhang ◽  
Wenyu Lu ◽  
Liang Zhou ◽  
Donghong Zhang ◽  
Hongzhen Cai ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Tensile Strength ◽  
Flame Retardant ◽  
High Density Polyethylene ◽  
Oxygen Index ◽  
High Density ◽  
Corn Straw ◽  
Scanning Calorimetry ◽  
Scanning Electron

Biocomposites were prepared with corn straw slagging (CSS) and high-density polyethylene (HDPE) at four loading levels (10, 20, 30, and 40 wt%) by extrusion method. CSS/HDPE composites were tested by tension, oxygen index meter, differential scanning calorimetry, X-ray diffraction, and the scanning electron microscopy. The scanning electron microscopy showed that CSS was dispersed uniformly in the HDPE matrix and strong interfacial interaction was achieved, which had an important influence on the tensile strength of the composites. The tensile strength of the composites could be improved with proper increase of CSS and reached maximum value at 30 wt% content. Furthermore, the addition of CSS played an important role in improving the flame-retardant ability of CSS/HDPE composites, and the limited oxygen index was 31.26% at 40 wt% content, good flame-retardant effect achieved.

Effects of extrusion parameters on tensile strength of polybenzimidazole fiber-reinforced high density polyethylene composites

2016 ◽  
Vol 36 (2) ◽  
pp. 113-118 ◽  
Author(s):  
Arfat Anis ◽  
Shan Faiz ◽  
Saeed M. Al-Zahrani
Keyword(s):  
Tensile Strength ◽  
High Density Polyethylene ◽  
Testing Machine ◽  
High Density ◽  
Fiber Reinforced ◽  
Screw Speed ◽  
Fiber Loading ◽  
Maximum Tensile Strength ◽  
Twin Screw ◽  
Polyethylene Composites

Abstract The objectives of this study were to examine the effects of fiber content and extrusion parameters on polybenzimidazole (PBI) fiber-reinforced polyethylene composites and to determine the optimum values for the tensile strength. The PBI fiber was physically mixed with high density polyethylene (HDPE) and then extruded through a twin screw extruder. The extrusion parameters were studied at different levels, barrel temperatures at 240°C, 250°C and 260°C and screw speeds at 12 rpm, 15 rpm and 18 rpm. The tensile strength was measured using a universal testing machine. A response surface experimental design using Design-Expert was applied to investigate the effect of fiber loading and extrusion parameters (barrel temperature, screw speed) on tensile properties of the resulting composite and consequently analyzing the optimized value for these parameters to yield maximum tensile strength. The analysis predicted a linear model which suggests that in order to achieve maximum tensile strength the screw speed should be 18 rpm, the barrel temperature at 240°C and at a fiber loading of 2%.

Lamination of Glass Fiber Woven Fabrics and High Density Polyethylene/Clay Composition: Preparation, Tensile Properties, and Crystallization Properties

2015 ◽  
Vol 749 ◽  
pp. 257-260
Author(s):  
Jia Horng Lin ◽  
Chih Kuang Chen ◽  
Wen Cheng Chen ◽  
Yu Chieh Tung ◽  
Ching Wen Lou
Keyword(s):  
Tensile Strength ◽  
Glass Fiber ◽  
High Density Polyethylene ◽  
Woven Fabrics ◽  
Strength Test ◽  
High Density ◽  
Scanning Calorimetry ◽  
Thermal Compression ◽  
Molding Method ◽  
Tensile Strength Test

In this study, high density polyethylene (HDPE) is reinforced by the combination of clay to form HDPE/clay composites by applying maleic anhydride grafted polyethylene (PE-g-MA) as a compatibilizer and a melt compounding method. The properties of composites are evaluated with a tensile strength test, a scanning electron microscope (SEM), and a differential scanning calorimetry (DSC). Next, such composites are laminated with glass fiber woven fabrics (GFW) to form HDPE/clay/GFW composites by using a thermal compression molding method. A tensile strength test and an SEM are used to measure the properties of the HDPE/clay/GFW composites. The test results show that the combination of clay in HDPE/clay composites does not provide their tensile strength with a distinct reinforcement. However, the dispersion of clay promotes the crystallization temperature of the HDPE/clay composites. In addition, using PE-g-MA as the compatibilizer results in a good adhesion of HDPE/clay composites to GFW, which in turn augments the tensile strength of the HDPE/clay/GFW composites.

Study on the Tensile Strength and Micromechanical Analysis of Alfa Fibers Reinforced High Density Polyethylene Composites

2019 ◽  
Vol 20 (3) ◽  
pp. 602-610 ◽  
Author(s):  
Sahar Salem ◽  
Helena Oliver-Ortega ◽  
Francesc X. Espinach ◽  
Karim Ben Hamed ◽  
Nizar Nasri ◽  
...  
Keyword(s):  
Tensile Strength ◽  
High Density Polyethylene ◽  
High Density ◽  
Micromechanical Analysis ◽  
Alfa Fibers ◽  
Polyethylene Composites

Thermal degradation of high-density polyethylene/soya spent powder blends

2015 ◽  
Vol 35 (5) ◽  
pp. 437-442 ◽  
Author(s):  
Sam Sung Ting ◽  
Norsri Kurniati Achmad ◽  
Hanafi Ismail ◽  
Ragunathan Santiagoo ◽  
Nik Noriman Zulkepli
Keyword(s):  
Thermal Stability ◽  
Differential Scanning Calorimetry ◽  
Tensile Strength ◽  
High Density Polyethylene ◽  
High Density ◽  
Infrared Analysis ◽  
Scanning Calorimetry ◽  
Elongation At Break ◽  
Aging Period ◽  
Thermal Stability Of

Abstract This study investigates the properties of high-density polyethylene (HDPE) with different soya spent powder (SSP) blend contents upon oven aging. The aged properties of the HDPE/SSP blends were studied by using tensile test, thermogravimetric analysis, differential scanning calorimetry and Fourier transform infrared analysis. The tensile strength and elongation at break (Eb) decreased inversely proportional to SSP content and aging period. The thermal stability of the blends was significantly reduced after 21 days of aging. After aging, the melting temperature and crystallinity of the blends decreased with increasing aging period. These results revealed that samples with higher SSP content are more brittle upon oven aging.

Measurement and Analysis on Tensile Strength and Crystallinity of Vibrating Extruded High-Density Polyethylene (HDPE) Sheet

2011 ◽  
Vol 291-294 ◽  
pp. 561-564
Author(s):  
Bao Shan Shi ◽  
Xue Mei Qin ◽  
Bing Li
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Low Temperature ◽  
High Density Polyethylene ◽  
High Density ◽  
X Ray Diffraction ◽  
Scanning Calorimetry ◽  
Scanning Electron Microcopy ◽  
Measurement And Analysis ◽  
Result Show

By the apparatus of differential scanning calorimetry (DSC), scanning electron microcopy (SEM) and wide angle X-ray diffraction (WAXD), The effect of vibration on the microstructure and mechanical properties of high-density polyethylene (HDPE) sheets, obtained through vibration plasticating extruder in low temperature, were measured and analysed. The result show that the tensile strength was much improved under the reciprocating axial vibration in low temperature. The phenomenon indicate that the vibration extrudate in low temperature has higher crystallinity, perfect crystallite, and strong inter-spherulite ties, which account for enhancement of the mechanical properties of sheets, compared to conventional static extrusion.

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