scholarly journals The Bending Strength and Hardness of Recycle Plastic Type HDPE (High Density Polyethylene) and PP (Polypropylene)

2019 ◽  
Vol 9 (2) ◽  
pp. 2008-2011
Keyword(s):  
High Density Polyethylene ◽  
Bending Strength ◽  
High Density ◽  
Maximum Power ◽  
Bending Test ◽  
Maximum Hardness ◽  
Beverage Container ◽  
Plastic Type ◽  
Food And Beverage ◽  
Recycle Plastic

The purpose of this research is to know the strength, flexibility and maximum hardness of plastic waste after pressing of HDPE, PET/PETE and PP type with bending test. Furthermore, the specimen is made referring to ASTM 6272 D and the testing is carried out with the specified measurement. The results show that the strongest recycled plastic with the highest bending level is obtained from the composition of 50% HDPE, 20% PET/PETE and 30% PP, with maximum power of 52.9 N/mm2 and 137.74 Kg/mm2 . In addition, the biggest flexibility strength is plastic with composition 50% HDPE, 20% PET/PETE and 30% PP with strength value of 9.53 N/mm2 . As for hardness value, it reaches 12.76 Kg/mm2 . Because the plastic in used is recycled Plastic, the resulting product cannot be used for food and beverage container. However, it can be used for flower pot and pencil case

An investigation on the effect of nanoparticle reinforcement and weld surface shape on bending behavior of rotary friction-welded high-density polyethylene

2021 ◽  
pp. 146442072110441
Author(s):  
Vahid Asghari ◽  
Abdolvahed Kami ◽  
Abbasali Bagheri
Keyword(s):  
High Density Polyethylene ◽  
Joint Strength ◽  
Bending Strength ◽  
Welded Joint ◽  
High Density ◽  
Surface Shape ◽  
Bending Tests ◽  
Three Point Bending ◽  
Rotary Friction Welding ◽  
Bending Behavior

In this research, high-density polyethylene rods were joined together using rotary friction-welding. The effects of nanoparticle reinforcement and weld surface shape on the welded joint strength were investigated. To this aim, high-density polyethylene rods with a length of 50 mm and a diameter of 22 mm were machined, and three weld surface shapes, that is, flat, step, and conic shapes (on male and female counterparts), were created. The high-density polyethylene rods were rotary friction-welded with the addition of ZnO and SiO2 nanoparticles. The bending strength of rotary friction-welded rods was assessed by conduction of three-point bending tests. The results showed that both the weld surface shape and nanoparticles influence the bending strength of the welded joints. It was found that the step sample welds have higher bending strength (average bending depth and force of 6.27 mm and 2027.8 N, respectively). Furthermore, except for the case of flat samples, the addition of the reinforcement nanoparticles resulted in the improvement of the bending strength of the rotary friction-welded rods.

Influence of silane/MaPE dual coupling agents on the rheological and mechanical properties of sawdust/rubber/HDPE composites

Holzforschung ◽  
2019 ◽  
Vol 73 (6) ◽  
pp. 605-611
Author(s):  
Xinwu Xu ◽  
Ling Chen ◽  
Jingquan Han ◽  
Xianxu Zhan
Keyword(s):  
Mechanical Properties ◽  
High Density Polyethylene ◽  
Bending Strength ◽  
Extrusion Process ◽  
High Density ◽  
Coupling Agents ◽  
Ground Tire Rubber ◽  
Bending Modulus ◽  
Coupling System ◽  
Recycled Rubber

Abstract Proper utilization of recycled rubber is of high environmental and resource concern. In this study, a composite (COMP) was created based on high-density fiberboard sawdust (HDFS), ground tire rubber (GTR) particles and virgin high-density polyethylene (HDPE) with the ratio of HDFS:GTR:HDPE=30:21:49 and with 1% PE wax as lubricant. A dual coupling agent system, i.e. bis-(triethoxysilylpropyl) tetrasulfide (TESPT, up to 5% based on the COMP total weight) together with maleated polyethylene (MaPE, 3, 5 and 8% based on the COMP weight), was applied. The rheological properties of the hybrid during the extrusion process was evaluated in a HAAKE miniLab rheometer, and the bending and tensile properties of injected COMP were tested. The results showed that addition of MaPE and TESPT has an evident influence on the shear viscosity and stress of the COMP fluid, and the two coupling chemicals have synergetic effects. Increased content of MaPE and/or TESPT improved the tensile and bending strength of the COMP, while excessive addition of TESPT (over 1%) decreased the bending modulus. To conclude, a dual coupling system, 5% MaPE plus 1% TESPT, seems to be advantageous for the COMP behavior.

Dynamic and Static Properties of Wood-Plastic Composites Made of Recycled High-Density Polyethylene

2010 ◽  
Vol 658 ◽  
pp. 475-478 ◽  
Author(s):  
Gui Wen Yu ◽  
Ying Cheng Hu ◽  
Ji You Gu
Keyword(s):  
Young’S Modulus ◽  
High Density Polyethylene ◽  
Young's Modulus ◽  
High Density ◽  
Bending Test ◽  
Wood Plastic Composites ◽  
Dynamic Young’S Modulus ◽  
Plastic Composites ◽  
Dynamic Young's Modulus ◽  
Recycled Hdpe

Three different nondestructive testing (NDT) methods were used on the wood-plastic composites (WPC), which were made of either recycled or virgin high-density polyethylene (HDPE) with poplar fibers as filler. The values of dynamic Young’s modulus of WPC based on recycled or virgin HDPE were measured by the different NDT methods, and the values of static bending modulus of elasticity (MOE) were also determined by three point bending test according to ASTM D790-03. The paper analyzed the variability of the dynamic young’s modulus of WPC based on recycled or virgin HDPE obtained with different NDT methods, and the correlativity was also estimated between the dynamic Young’s modulus and the static MOE of WPC based on recycled HDPE. These results suggest that WPC can be made of recycled HDPE, and the NDT methods can be appropriate to estimate the dynamic Young’s modulus of WPC based on recycled HDPE.

scholarly journals Pengaruh Penambahan Serat Limbah Plastik HDPE terhadap Kuat Tekan pada Mortar

2021 ◽  
Vol 1 (2) ◽  
pp. 60-64
Author(s):  
Yoga Aprianto Harsoyo ◽  
Muhammad Rifqi Fauzi
Keyword(s):  
Compressive Strength ◽  
High Density Polyethylene ◽  
Construction Material ◽  
Plastic Waste ◽  
High Density ◽  
Road Infrastructure ◽  
Plastic Type ◽  
The World

Mortar merupakan bahan konstruksi yang umum digunakan pada gedung maupun jalan. Beberapa konstruksi yang menggunakan mortar antara lain Lane Concrete (LC), spesi, perekat bata ringan, plester dinding, acian instan, pemasangan kramik, dan lain-lain. Serat limbah plastik HDPE (High Density Polyethylene) pada penelitian ini adalah bahan campuran sebagai pengikat dan pengganti semen. Plastik HDPE merupakan salah satu jenis plastik yang jika dilihat secara visual tergolong pekat, dimana pemakaian jenis plastik ini biasanya digunakan  untuk botol minuman. Jenis plastik HDPE mudah untuk di daur ulang. Penelitian ini diharapkan dapat mengurangi jumlah limbah plastik yang ada di Indonesia. Tujuan penelitian ini adalah untuk mengkaji pengaruh pencampuran serat limbah plastik HDPE dengan variasi terhadap kuat tekan dan berat mortar. Serat yang digunakan sebanyak 0%, 2%, 4%, dan 6% terhadap berat semennya. Penelitian ini dilakukan untuk memperoleh kuat tekan mortar pada umur 7 hari dan 28 hari dengan menggunakan benda uji kubus dengan dimensi 15 cm × 15 cm × 15 cm. Hasil pengujian menunjukkan bahwa kuat tekan tertinggi untuk mortar serat pada variasi serat 2% di umur 28 hari yaitu sebesar 14,47 MPa. Kuat tekan mortar pada umur 7 dan 28 hari berturut-turut mengalami kenaikan sekitar 11%. Sedangkan pada penambahan serat, kuat tekan mortar mengalami penurunan seiring dengan semakin banyaknya campuran serat. Mortar serat mengalami penurunan berat dari 7696 gram menjadi 7640 gram, 7422 gram, dan 7280 gram, masing-masing untuk 2%, 4%, dan 6% serat pada umur 28 hari. Mortar is a construction material commonly used in building and road infrastructure. Some constructions that use mortar include Lane Concrete (LC), species, light brick adhesives, wall plaster, mechanical installation, and others. HDPE plastic waste fiber (High density polyethylene) in this study is a mixture of materials as binders and cement substitutes. HDPE plastic is one type of plastic that when viewed visually is classified as concentrated, where the use of this type of plastic is usually used for beverage bottles. The HDPE plastic type is easy to recycle. In 2015, global plastic waste in the world was recorded at 2.5 billion tons per year, so this research is expected to reduce the amount of plastic waste in Indonesia. The purpose of this study was to analyze the  effect of mixing HDPE plastic waste fibers on compressive strength and mortar weight. This HDPE variations of 0%, 2%, 4%, and 6% is used from the weight of the cement. This study was carried out to obtain the compressive strength at the ages of 7 days and 28 days using cube specimens with dimensions of 15 cm × 15 cm × 15 cm. Based on the results of the test, the highest compressive strength for mortar at of 2% fiber variation at 28 days is 14.47 MPa. The compressive strength of mortar at the age of 7 and 28 consecutive days increased by 11%. While the addition of fibers, compressive strength of mortar decreases with the increasing number of fiber mixtures. Fiber mortar decreased in weight from 7696 grams to 7640 grams, 7422 grams, and 7280 grams, for fiber of 2%, 4%, and 6% respectively. Mortar is a construction material commonly used in building and road infrastructure. Some constructions that use mortar include Lane Concrete (LC), species, light brick adhesives, wall plaster, mechanical installation, and others. HDPE plastic waste fiber (High density polyethylene) in this study is a mixture of materials as binders and cement substitutes. HDPE plastic is one type of plastic that when viewed visually is classified as concentrated, where the use of this type of plastic is usually used for beverage bottles. The HDPE plastic type is easy to recycle. In 2015, global plastic waste in the world was recorded at 2.5 billion tons per year, so this research is expected to reduce the amount of plastic waste in Indonesia. The purpose of this study was to analyze the  effect of mixing HDPE plastic waste fibers on compressive strength and mortar weight. This HDPE variations of 0%, 2%, 4%, and 6% is used from the weight of the cement. This study was carried out to obtain the compressive strength at the ages of 7 days and 28 days using cube specimens with dimensions of 15 cm × 15 cm × 15 cm. Based on the results of the test, the highest compressive strength for mortar at of 2% fiber variation at 28 days is 14.47 MPa. The compressive strength of mortar at the age of 7 and 28 consecutive days increased by 11%. While the addition of fibers, compressive strength of mortar decreases with the increasing number of fiber mixtures. Fiber mortar decreased in weight from 7696 grams to 7640 grams, 7422 grams, and 7280 grams, for fiber of 2%, 4%, and 6% respectively.

Evaluation of Thermal Degradation of High Density Polyethylene by Principal Component Analysis

2016 ◽  
Vol 852 ◽  
pp. 632-638
Author(s):  
Jun Jun Guo ◽  
Hua Yan ◽  
Jun Dai ◽  
Zhi De Hu ◽  
Jian Jian Yang
Keyword(s):  
Tensile Strength ◽  
Impact Strength ◽  
High Density Polyethylene ◽  
Bending Strength ◽  
Tensile Modulus ◽  
Chain Scission ◽  
High Density ◽  
Strongly Correlated ◽  
Performance Parameters ◽  
Carbonyl Index

Principal components analysis (PCA) is a data analysis and reduction technique widely used in the method of statistical analysis,elucidation of the variation of five mechanical properties (tensile strength, bending strength, impact strength, tensile modulus and bending modulus) and five microstructure properties (carbonyl index, hydroxyl index, branching degree, chain scission degree and unsaturated value) that taken place when subjected to ultraviolet (UV) aging of high density polyethylene (HDPE) used as rotational packaging case by using PCA. The information of main components were extracted and studied. Also the relationships between performance properties were considered. Finally, the combined evaluating parameter Z was established and analyzed. The results show that the first and second components extracted by PCA can be determined on behalf of all components. Among the 10 performance parameters, tensile strength, bending strength and impact strength are strongly correlated, carbonyl index, hydroxyl index, branching degree and chain scission degree are strongly correlated, and the tensile modulus is non-correlated to other performance parameters. The trendy of the evaluating parameter Z show that the HDPE aged quickly in the first 20 days and leveled off in the following days.

scholarly journals Analysis and Identification of the Mechanism of Damage and Fracture of High-Filled Wood Fiber/Recycled High-Density Polyethylene Composites

Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 170 ◽  
Author(s):  
Yong Guo ◽  
Shiliu Zhu ◽  
Yuxia Chen ◽  
Dagang Li
Keyword(s):  
High Density Polyethylene ◽  
Damage Accumulation ◽  
Fracture Process ◽  
Wood Fiber ◽  
Maximum Load ◽  
High Density ◽  
Bending Test ◽  
Repeated Loading ◽  
Irreversible Damage ◽  
Damage And Fracture

The damage and fracture of fiber reinforced polymer composites are vital constraints in their applications. To understand the mechanism of damage of wood fiber (WF) reinforced high density polyethylene (HDPE) composites, we used waste WF and recycled HDPE (Re-HDPE) as the raw materials and prepared high-filled WF/Re-HDPE composites via extrusion. The damage and fracture mode and failure mechanism of the composites with different WF contents (50%, 60%, and 70%) was studied under a three-point bending test by combining the acoustic emission (AE) technique and scanning electron microscope (SEM) analysis. The results show that AE technology can better assist in understanding the progress of damage and fracture process of WF/Re-HDPE composites, and determine the damage degree, damage accumulation, and damage mode. The damage and fracture process of the composites presents three main stages: the appearance of initial damage, damage accumulation, and destructive damage to fracture. The matrix deformation, fiber breakage, interface delamination, fiber-matrix debonding, fiber pull-out, and matrix cracking were the dominant modes for the damage of high-filled WF/Re-HDPE composites under bending load, and the AE signal changed in different damage stages and damage modes. In addition, the WF content and repeated loading had a significant influence on the composite’s damage and fracture. The 50% and 60% WF/Re-HDPE composites produced irreversible damage when repeated load exceeded 75% of the maximum load, while 25% of the maximum load could cause irreversible damage for 70% WF/Re-HDPE composites. The damage was accumulated owing to repeated loading and the mechanical properties of the composites were seriously affected.

scholarly journals The Effect of Curing Pressure and Duration on Mechanical Strength of Ultrahigh Molecular Weight Polyethylene/High-Density Polyethylene Composite as An Alternative Material for Windmill Turbine

Rekayasa ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 219-224
Author(s):  
Febrianti Nurul Hidayah ◽  
Johan Boss
Keyword(s):  
Mechanical Properties ◽  
Molecular Weight ◽  
Mechanical Strength ◽  
High Density Polyethylene ◽  
Bending Strength ◽  
Minimum Weight ◽  
Ultrahigh Molecular Weight Polyethylene ◽  
High Density ◽  
Significant Difference ◽  
Ultrahigh Molecular Weight

The use of steel in building or construction manufacture continues to decrease, owing in part to the sustainability and mechanical properties of fibers which have higher strength in minimum weight than steel. This preliminary study was defined to evaluate the mechanical properties of high-performance fibers, especially ultrahigh molecular weight polyethylene (UHMWPE), in terms of the composite to be the main material of windmill turbines. It was UHMWPE as reinforcement and high-density polyethylene (HDPE) as a matrix in this composite system. The composites were processed in a variety of pressure and duration (50 to 165 bar and 10 minutes to 48 hours). The mechanical strength was tested by 3-point bending tests to measure the interlaminar shear strength, shear modulus, and bending strength. The result showed a significant difference in properties of the composite which is higher pressure and longer duration obtained a higher value of mechanical strength.

Composition and Surface Topography Effects on Apatite-Forming Ability of Ceramic-Polymer Composites

2003 ◽  
Vol 774 ◽  
Author(s):  
Susan M. Rea ◽  
Serena M. Best ◽  
William Bonfield
Keyword(s):  
Surface Topography ◽  
High Density Polyethylene ◽  
High Density ◽  
Apatite Layer ◽  
Biologically Active ◽  
Human Blood Plasma ◽  
Apatite Formation ◽  
Polyethylene Matrix ◽  
Composite Surface ◽  
X Ray

AbstractHAPEXTM (40 vol% hydroxyapatite in a high-density polyethylene matrix) and AWPEX (40 vol% apatite-wollastonite glass ceramic in a high density polyethylene matrix) are composites designed to provide bioactivity and to match the mechanical properties of human cortical bone. HAPEXTM has had clinical success in middle ear and orbital implants, and there is great potential for further orthopaedic applications of these materials. However, more detailed in vitro investigations must be performed to better understand the biological interactions of the composites and so the bioactivity of each material was assessed in this study. Specifically, the effects of controlled surface topography and ceramic filler composition on apatite layer formation in acellular simulated body fluid (SBF) with ion concentration similar to those of human blood plasma were examined. Samples were prepared as 1 cm × 1 cm × 1 mm tiles with polished, roughened, or parallel-grooved surface finishes, and were incubated in 20 ml of SBF at 36.5 °C for 1, 3, 7, or 14 days. The formation of a biologically active apatite layer on the composite surface after immersion was demonstrated by thin-film x-ray diffraction (TF-XRD), environmental scanning electron microscopy (ESEM) imaging and energy dispersive x-ray (EDX) analysis. Variations in sample weight and solution pH over the period of incubation were also recorded. Significant differences were found between the two materials tested, with greater bioactivity in AWPEX than HAPEXTM overall. Results also indicate that within each material the surface topography is highly important, with rougher samples correlated to earlier apatite formation.

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