scholarly journals Mechanical and Thermal Properties of R-High Density Polyethylene Composites Reinforced with Wheat Straw Particleboard Dust and Basalt Fiber

2018 ◽  
Vol 2018 ◽  
pp. 1-10
Author(s):  
Min Yu ◽  
Haiyan Mao ◽  
Runzhou Huang ◽  
Zhenghao Ge ◽  
Pujian Tian ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal Expansion ◽  
Wheat Straw ◽  
High Density Polyethylene ◽  
Coefficient Of Thermal Expansion ◽  
Basalt Fiber ◽  
High Density ◽  
Mechanical And Thermal Properties ◽  
Linear Coefficient ◽  
Loading Level

The effect of individual and combined particleboard dust (PB dust) and basalt fibers (BFs) on mechanical and thermal expansion performance of the filled virgin and recycled high density polyethylene (HDPE) composites was studied. It was shown that the use of PB dust had a positive effect on improving mechanical properties and on reducing linear coefficient of thermal expansion (LCTE) values of filled composites, because the adhesive of the particle board held the wheat straw fibers into bundles, which made PB dust have a certain aspect ratio and high strength. Compared with the commonly used commercial WPC products, the flexural strength of PB dust/VHDPE, PB dust/RHDPE, and PB dust/VHDPE/RHDEPE at 40 wt% loading level increased by 79.9%, 41.5%, and 53.9%, respectively. When 40 wt% PB dust was added, the crystallization degree of the composites based on three matrixes decreased to 72.5%, 45.7%, and 64.1%, respectively. The use of PB dust can help lower the composite costs and increase its recyclability. Mechanical properties and LCTE values of composites with combined BF and PB dust fillers varied with PB dust and BF ratio at a given total filler loading level. As the BF portion of the PB dust/BF fillers increased, the LCTE values decreased markedly, which was suggested to be able to achieve a desirable dimensional stability for composites. The process provides a useful route to further recycling of agricultural wastes.

Influence of Chopped Fibre Length on the Mechanical and Thermal Properties of Silk Fibre-Reinforced Poly(Butylene Succinate) Biocomposites

2005 ◽  
Vol 13 (5) ◽  
pp. 479-488 ◽  
Author(s):  
Sang Muk Lee ◽  
Seong Ok Han ◽  
Donghwan Cho ◽  
Won Ho Park ◽  
Seung Goo Lee
Keyword(s):  
Mechanical Properties ◽  
Thermal Expansion ◽  
Thermal Properties ◽  
Coefficient Of Thermal Expansion ◽  
Fibre Length ◽  
Present System ◽  
Silk Fibre ◽  
Mechanical And Thermal Properties ◽  
Butylene Succinate ◽  
Linear Coefficient

The influence of chopped fibre length on the mechanical and thermal properties of silk fibre ( Bombix mori) reinforced poly(butylene succinate) (PBS) biocomposites has been investigated in terms of tensile and flexural properties, thermal stability, thermal expansion, and dynamic mechanical properties. The chopped fibre lengths studied were 3.2 mm, 6.4 mm, 12.7 mm, and 25.4 mm. The results demonstrate that chopped silk fibres play an effective role in improving the mechanical properties of PBS in the present system. At a fixed fibre loading of 40 wt%, the tensile strength and modulus of the PBS control were improved by 69% and 228%, respectively, in comparison with those of the biocomposite reinforced with 25.4 mm silk fibres. The flexural strength and modulus of PBS were also greatly improved by 167% and 323%, respectively. The thermal properties of PBS resin increased when incorporating chopped silk fibres in the composite matrix. The biocomposites had much lower linear coefficient of thermal expansion (CTE) values and higher storage moduli than the PBS controls above the glass transition region, especially with reinforcing silk fibres of 25.4 mm long.

Mechanical and Thermal Properties of Ternary System Based on Starch-Grafted-Polyethylene/High Density Polyethylene/Halloysite Nanocomposites

2019 ◽  
Vol 800 ◽  
pp. 210-215
Author(s):  
Walid Fermas ◽  
Mustapha Kaci ◽  
Remo Merijs Meri ◽  
Janis Zicans
Keyword(s):  
Mechanical Properties ◽  
High Density Polyethylene ◽  
Chemical Structure ◽  
Filler Content ◽  
Halloysite Nanotubes ◽  
High Density ◽  
Flexural Properties ◽  
Mechanical And Thermal Properties ◽  
Thermal And Mechanical Properties ◽  
Content Ratio

In this paper, the effect of unmodified halloysite nanotubes (HNTs) content on the chemical structure and the thermal and mechanical properties of blends based on starch-grafted-polyethylene (SgP) and high density polyethylene (HDPE) (70/30 w/w) nanocomposites was investigated at various filler content ratios, i.e. 1.5, 3 and 5 wt.%. The study showed the occurrence of chemical interactions between the polymer matrix and HNTs through OH bonding. Further, the addition of HNTs to the polymer blend led to an increase in the crystallization temperature of the nanocomposite samples, in particular at higher filler contents i.e. 3 and 5 wt.%, while the melting temperature remained almost unchanged. Tensile and flexural properties of the nanocomposite samples were however improved compared to the virgin blend with respect to the HNTs content ratio.

Green composites based on high density polyethylene and recycled coffee gunny: Morphology, thermal, and mechanical properties

2020 ◽  
Vol 34 (07n09) ◽  
pp. 2040008
Author(s):  
Yeng-Fong Shih ◽  
Venkata Krishna Kotharangannagari ◽  
Ruo-Mei Chen
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
High Density Polyethylene ◽  
High Density ◽  
Mechanical And Thermal Properties ◽  
Reinforced Composites ◽  
Green Composites ◽  
Thermal And Mechanical Properties ◽  
Heat Deflection Temperature ◽  
Properties Of Composites

In this study, recycled coffee gunny (RCG) was used to reinforce high density polyethylene (HDPE). Maleic anhydride grafted polyethylene (MAPE) was added as a compatibilizer. Moreover, the RCG was chemically treated to enhance the compatibility between fiber and HDPE matrix. A series of RCG reinforced composites were prepared and the effects of MAPE and chemical modification of RCG on the mechanical and thermal properties of HDPE were investigated. The results of thermal and mechanical properties of composites revealed that the increments of heat deflection temperature, tensile strength, and impact strength of HDPE were 16[Formula: see text]C, 19.64% and 43.63% by the addition of modified coffee gunny, respectively. It reveals that the HDPE was reinforced with the coffee gunny, and thus can effectively reuse the discarded resources.

Effect of Electron Beam Irradiation on Mechanical and Thermal Properties of Ethylene Vinyl Acetate/Polyamide 6/High Density Polyethylene Nanocomposite

2014 ◽  
Vol 493 ◽  
pp. 703-708
Author(s):  
Farizah Hamid ◽  
Suffiyana Akhbar ◽  
Ku Halim Ku Hamid ◽  
Abdul Rahman Mohd Faizal
Keyword(s):  
Mechanical Properties ◽  
Electron Beam ◽  
Vinyl Acetate ◽  
High Density Polyethylene ◽  
Electron Beam Irradiation ◽  
Ethylene Vinyl Acetate ◽  
Polyamide 6 ◽  
High Density ◽  
Mechanical And Thermal Properties ◽  
Beam Irradiation

The effect of electron beam irradiation on mechanical properties of Ethylene vinyl acetate (EVA) with polyamide 6/high density polyethylene/HDPE-g-MAH and montmorillonite (MMT) were prepared by melt blending the characterization were investigated. The composites were characterized by Fourier Transform Infrared (FTIR) spectrophotometer and Thermogravimetric Analyzer (TGA) The samples were cross-linked by electron beam and irradiated at the dosage range of 0-200 kGy and 3.0 MeV. The mechanical properties of the samples which are tensile test and flexural test were measured by universal tensile machine whiles hardness was measured using Rockwell hardness tester. The gel content was performed to determine the formation of crosslinking and it showed improvement with increase dose up to 150 kGy. The result shows the increasing of tensile strength, tensile modulus, and hardness at the dosage 150 kGy but slightly decline at dose up to 200 kGy. Meanwhile TGA test showed that both irradiated and unirradiated samples have same trend characterization but irradiated samples are slightly more thermal stability. As a conclusion the electron beam irradiation enhance mechanical and thermal properties of ethylene vinyl acetate/polyamide 6/high density polyethylene nanocomposite.

scholarly journals Tuning Thermal and Mechanical Properties of Polydimethylsiloxane with Carbon Fibers

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1141
Author(s):  
Nevin Stephen Gupta ◽  
Kwan-Soo Lee ◽  
Andrea Labouriau
Keyword(s):  
Mechanical Properties ◽  
Thermal Expansion ◽  
Carbon Fibers ◽  
Coefficient Of Thermal Expansion ◽  
Mechanical And Thermal Properties ◽  
Mechanical Mixing ◽  
Scanning Calorimetry ◽  
Mechanical Hardness ◽  
Degradation Temperature ◽  
Cost Efficient

In order to meet the needs of constantly advancing technologies, fabricating materials with improved properties and predictable behavior has become vital. To that end, we have prepared polydimethylsiloxane (PDMS) polymer samples filled with carbon nanofibers (CFs) at 0, 0.5, 1.0, 2.0, and 4.0 CF loadings (w/w) to investigate and optimize the amount of filler needed for fabrication with improved mechanical properties. Samples were prepared using easy, cost-efficient mechanical mixing to combine the PDMS and CF filler and were then characterized by chemical (FTIR), mechanical (hardness and tension), and physical (swelling, thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and coefficient of thermal expansion) analyses to determine the material properties. We found that hardness and thermal stability increased predictably, while the ultimate strength and toughness both decreased. Repeated tension caused the CF-filled PDMS samples to lose significant toughness with increasing CF loadings. The hardness and thermal degradation temperature with 4 wt.% CF loading in PDMS increased more than 40% and 25 °C, respectively, compared with the pristine PDMS sample. Additionally, dilatometer measurements showed a 20% decrease in the coefficient of thermal expansion (CTE) with a small amount of CF filler in PDMS. In this study, we were able to show the mechanical and thermal properties of PDMS can be tuned with good confidence using CFs.

scholarly journals Thermal and mechanical properties of ultrahigh molecular weight polyethylene/high-density polyethylene/polyethylene glycol blends

2013 ◽  
Vol 33 (7) ◽  
pp. 599-614 ◽  
Author(s):  
Mazatusziha Ahmad ◽  
Mat Uzir Wahit ◽  
Mohammed Rafiq Abdul Kadir ◽  
Khairul Zaman Mohd Dahlan ◽  
Mohammad Jawaid
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Polyethylene Glycol ◽  
Impact Strength ◽  
High Density Polyethylene ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
High Density ◽  
Mechanical And Thermal Properties ◽  
Degradation Temperature ◽  
Ultrahigh Molecular Weight

Abstract Blends of ultrahigh molecular weight polyethylene (UHMWPE) with high-density polyethylene (HDPE) provide adequate mechanical properties for biomedical application. In this study, the mechanical and thermal properties of UHMWPE/HDPE blends with the addition of polyethylene glycol (PEG) prepared via single-screw extruder nanomixer were investigated. The UHMWPE/HDPE blends exhibit a gradual increase in strength, modulus, and impact strength over pure polymers, suggesting synergism in the polymer blends. The elastic and flexural modulus was increased at the expense of tensile, flexural, and impact strength for the blends containing PEG. The degradation temperature of UHMWPE was improved with the incorporation of HDPE due to good thermal stability of HDPE. HDPE improved the dispersibility of PEG in matrix, consequently reduced the surface area available for the kinetic effects, and reduced the degradation temperature. The morphology analysis confirmed the miscibility between UHMWPE and HDPE and the changes in polymer structure with the presence of PEG modify the thermal behavior of the blends. The mechanical properties of the blends that are underlying values for the design of implant material show the potential used as biomedical devices.

scholarly journals Effects of Extractives on Dimensional Stability, Dynamic Mechanical Properties, Creep, and Stress Relaxation of Rice Straw/High-Density Polyethylene Composites

Polymers ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1176 ◽  
Author(s):  
Huanbo Wang ◽  
Fazhi Lin ◽  
Pingping Qiu ◽  
Tian Liu
Keyword(s):  
Mechanical Properties ◽  
Thermal Expansion ◽  
Stress Relaxation ◽  
Rice Straw ◽  
Dimensional Stability ◽  
High Density Polyethylene ◽  
Dynamic Mechanical Properties ◽  
High Density ◽  
Dynamic Mechanical ◽  
Creep And Stress Relaxation

The removal of rice straw extractives increases the interphase adhesion between rice straw and the high-density polyethylene (HDPE) matrix, while eradicating the inner defects of rice straw/HDPE composites. This study investigated the effect of rice straw extractives removal on the dimensional stability (water uptake and thermal expansion), dynamic mechanical properties, creep, and stress relaxation of rice straw/HDPE composites. Cold water (CW), hot water (HW), and 1% alkaline solution (AL) extraction methods were utilized to remove rice straw extractives. Extracted and unextracted rice straws were mixed with HDPE, maleated polyethylene (MAPE), and Polyethylene wax to prepare composites via extrusion. Removal of rice straw extractives significantly improved the dimensional stability, dynamic mechanical properties, and creep and stress relaxation of rice straw/HDPE composites, with the exception of the thickness swelling of the AL/HDPE and the thermal expansion of the rice straw/HDPE composites. HW/HDPE exhibited the best comprehensive performance.

Mechanical and Thermal Properties of Hemp Fiber Reinforced High Density Polyethylene Composites

2015 ◽  
Vol 659 ◽  
pp. 441-445
Author(s):  
Tawat Soitong
Keyword(s):  
Mechanical Properties ◽  
High Density Polyethylene ◽  
High Density ◽  
Mechanical And Thermal Properties ◽  
Matrix Interface ◽  
Fiber Reinforced ◽  
Hemp Fiber ◽  
Treated Fiber ◽  
Fiber Matrix Interface ◽  
Fiber Matrix

Hemp fiber reinforced composites was prepared using high density polyethylene (HDPE). Hemp fiber is a cellulosic fiber. It is used as reinforcement in thermoplastic matrix composite requires knowledge of their morphology and structure. In this paper, mechanical properties of chemically treated fiber reinforced HDPE composites were investigated over range of fiber content (0-50 wt%). The hemp fiber was alkali treated with 1-10 wt% to remove waxes and non-cellulosic surface components and triethoxyvinyl silane treated with 0.5-3 wt% to improve a better fiber-matrix interface. Fiber/matrix adhesion was assured by the use of use of polyethylene-graft-maleic anhydride (PE-g-MA) as a compatibilizer. Scanning electron microscopy (SEM), Fourier transforms infrared spectroscopy (FTIR), Differential scanning calorimetry (DSC), X-Ray Diffraction (XRD) and tensile tests were carried out for hemp fibers high density polyethylene composite. Findings indicate that a 5 wt% NaOH treatment effectively improved the fiber-matrix interface resulting in improved mechanical properties. All 40 wt% alkali treated fiber reinforced HDPE composites displayed higher young’s modulus and lower elongation at break as compared to neat HDPE, compatibilization with PE-g-MA resulted in an increased young modulus of the composites as consequence of an improved fiber-matrix interfacial adhesion.

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