Experimental And Theoretical Study on The Impact Strength and Hardness Properties Of HDPE/SWCNTs Nanocomposites (original) (raw)
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Study of Mechanical Properties of Polyethylene/CNT Nanocomposites: Experimental, FEM and MD
ICMAME 2023 Conference Proceedings
Designing and developing a new material can be challenging due to several aspects that require consideration. Materia behavior, material properties (physical or chemical), and other material characteristics are the factors to consider when developing new materials. In this work, polymer-based nanocomposite material is developed using High-Density Polyethylene (HDPE) as a matrix, Single-walled Carbon Nanotube (SWCNTs) as the reinforcing particles. Moreover, the mechanical properties of the produced HDPE/SWCNT nanocomposites, such as elastic modulus, were investigated at different weight fractions of SWCNTs. The investigation was conducted using numerical (Molecular Dynamics MD), theoretical (Finite Element Method FEM), and experimental approaches. The major aim of this study was to validate the accuracy of the developed MD model and the theoretical FEM with the experimental results. The obtained elastic modulus results from the MD and FEM were compared to see which method produced th...
International Journal of Nanoscience, 2011
Carbon nanotubes have been used as a reinforcing element to improve the properties of polymer matrix. An attempt has been made to investigate the mechanical behavior of carbon nanotubesÀhigh-density polyethylene (CNTÀHDPE) nanocomposites using a small punch technique. The designed punch assembly was fabricated and mounted on the Universal Testing Machine. The experimental setup was calibrated using aluminum and mild steel where the relative error was found to be within 7%. The mechanical properties of the nanocomposites, were studied by varying the weight fraction of CNT in HDPE. It was found that Young's modulus and ultimate strength of nanocomposites were increased by 37% and 36%, respectively for 1 wt% of CNTs in HDPE and they were found to increase linearly with an increase in CNT concentration. It is concluded that the small punch technique was successfully developed and tested to characterize the mechanical properties of HDPE and CNTÀHDPE nanocomposites.
Microsystem Technologies, 2020
The aim of this study is to evaluate the elastic properties of high-density polyethylene (HDPE) using single-walled carbon nanotubes (SWCNTs) reinforcements with experimental and Finite element method (FEM) considering two different processing techniques effect. SWCNT nanoparticles were used to strengthen the HDPE matrix at the weight fractions (wt%) of 0, 0.2, 0.4, 0.6, 0.8, and 1 and the resulting nanocomposites were processed using injection and compression moulding. From each processing method, the HDPE/SWCNTs nanocomposites tensile test specimen were prepared and tested for the elastic properties. Experimental results showed that the addition of SWCNT nanoparticles for each weight fractions and both processing methods enhanced the elastic properties of HDPE. Finally, the numerical simulations were conducted using FEM for the prediction of the elastic modulus of HDPE/SWCNT nanocomposites for both processing methods. Whereby the representative volume element (RVE) model was presented with an interfacial phase region separating the load transfer between the SWCNT and HDPE with the properties obtained from the atomic modelling results. The numerical FEM elastic modulus results were found to correlate with the experimental results.
Mechanical properties of high density polyethylene/carbon nanotube composites
Composites Science and Technology, 2007
Carbon-nanotubes (CNTs) have been used with polymers from the date of their inception to make composites having remarkable properties. An attempt has been made in this direction, in order to enhance mechanical and tribological properties of the composite materials. The latter, were achieved through the injection molding of high density polyethylene (HDPE) reinforced with specific volume fraction of CNTs. A considerable improvement on mechanical properties of the material can be observed when the volume fraction of CNT is increased. The composite reinforcement shows a good load transfer effect and interface link between CNT and HDPE. The volumetric wear rate is calculated from the Wang's model, Ratner's correlation and reciprocal of toughness. The results obtained clearly show the linear relationship with CNT loading which supports the microscopic wear model. It is concluded that both Halpin-Tsai and modified series model can be used to predict Young's modulus of CNT-HDPE composites. From thermal analysis study, it is found that melting point and oxidation temperature of the composites are not affected by the addition of CNTs, however its crystallinity seems to increase.
2012
The present research aims to investigate the mechanical, rheological, thermal, electrical and morphological properties of nanocomposites prepared from polypropylene (PP) and multi-walled carbon nanotube (MWCNT) whose content was varied from 1-6wt%. The electrical resistance of the PP/MWCNT decreased dramatically with the addition of the MWCNT; the PP/MWCNT showed an electrical percolation threshold at the MWCNT content of 1 wt%. The relative viscosity was reduced as the shear rate and temperature increased. The thermal properties of the PP/MWCNT and the crystallization temperature were raised significantly with the MWCNT loading but the degree of crystallinity remained unchanged. The tensile modulus of the PP/MWCNT increased significantly with the presence of the MWCNT while the impact energy increased with the MWCNT loading.
Journal of Thermoplastic Composite Materials
In this article, the effect of carbon nanotube’s (CNT) surface modification on mechanical, thermal, and morphological properties of nanocomposite with different content of CNTs was studied. CNT/high-density polyethylene (HDPE) nanocomposites were prepared by a mini twin-screw extruder. To modify the dispersion of MWCNTs in HDPE, the surface of CNTs was functionalized by HNO3 and stearic acid (SA). The tensile tests results show that addition of 5% of acid-treated CNT in HDPE cause to increase in Young’s modulus and yield strength up to 4% and 6%, respectively; as compared to unmodified CNT/HDPE nanocomposite. The presence of the SA on CNTs can lead to slight decrease of the CNT-SA/HDPE strength properties; when compared to pure CNT/PE nanocomposite. However, there is a fracture toughness enhancement in CNT-SA/HDPE up to 10% compare to unmodified CNT/PE nanocomposite. Furthermore, the calculation of the stress whitening zone of all samples verifies the fracture toughness data of CNT/...
Journal of Reinforced Plastics and Composites, 2017
Addition of nanoparticles in polymeric composites for use in fabrication and characterization of fiber-reinforced plastic composites has recently shown a lot of promise. Nanoparticles typically used in most studies include multi-walled carbon nanotubes (MWCNTs) and nanoclay. In the current research, in addition to including nanoclay and MWCNTs individually, we have also studied the effect of hybrid of the two in enhancing the impact performance of carbon fiber-reinforced plastic (CFRP) composites. We have fabricated CFRP composites with 0.3 wt.% of MWCNTs, 2 wt.% of nanoclay and hybrid of MWCNTs and nanoclay at 0.1 wt.% and 2 wt.%, respectively. Control samples were also fabricated with no nanoparticles. Composite laminates were subjected to impact loading at 30, 40 and 50 J energy levels. Energy, load, displacement and velocity responses of samples were obtained. Damage area of control and all modified samples were investigated using digital thermography technique and compared. MWC...
2012
Mechanical Properties of polypropylene/carbon nanotube nanocomposites are investigated via two different processing techniques: hot press and injection molding. The specimens included 1 wt% MWCNT prepared from each method are compared during Tensile, Flexural and Low velocity impact tests. The results obtained from injection molding process indicated better influence in increasing mechanical properties of nanocomposites compared with hot press data's. It may be due to this fact that injection molding process applies redoubled effect in shear mixing of carbon nanotubes in polymer matrix resulting better dispersion of carbon nanotubes in polypropylene matrix and enhancement of mechanical properties of nanocomposites.
Prediction of the elastic behaviour of HDPE/SWCNTs nanocomposites with FEM approach
Journal of Physics: Conference Series, 2019
Prediction of elastic behaviour of polymer-based nanocomposite using finite element method (FEM) has attracted the attention of many researchers in the past few years. In this study, ANSYS 19.2 software was used to predict the elastic modulus of highdensity polyethylene (HDPE) reinforced with single-walled carbon nanotubes (SWCNTs) at different weight fractions. Three-dimensional (3-D) representative volume element (RVE) was created by FEM using ANSYS software to estimate the elastic modulus of HDPE based nanocomposite reinforced with SWCNTs nanoparticles at 0.2 wt%, 0.4 wt%, 0.6 wt%, 0.8 wt%, and 1 wt% weight fractions. To present the FEM model for predicting the elastic modulus of HDPE/SWCNT nanocomposite, the results from atomic modelling were extracted and used for properties of matrix and fibre interface. The interfacial region was used in the model to separate the conditions of load transfer between the HDPE matrix and SWCNT fibre. Two density fractions of HDPE/SWCNTs nanocomposite were also used in terms of two different densities for both HDPE and SWCNT to investigate their effect on the elastic modulus. The modelling results showed that the increase of weight fraction of single-walled carbon nanotubes (SWCNTs) results with the increase of relative elastic modulus of the nanocomposite. The results also showed that the elastic modulus of low-density fraction HDPE/SWCNTs nanocomposite improves more compared to one of the high-density fractions at the same SWCNTs weight fraction. Rule of the mixture was also used to predict the elastic behaviour of HDPE/SWCNT nanocomposite and the results were compared to those of the FEM model for validation.