scholarly journals Study of Mechanical Properties of Recycled Polyethylene of High and Low Density

2022 ◽  
Vol 58 (4) ◽  
pp. 210-215
Author(s):  
Antypas Imad Rezakalla ◽  
Savostina Tatiana Petrovna
Keyword(s):  
Mechanical Properties ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Test Results ◽  
Mechanical Recycling ◽  
Mixing Ratios ◽  
Fracture Elongation ◽  
Frequent Use ◽  
The Impact ◽  
Plastics Waste

High and low density polyethylene materials constitute about 48% of total weight of plastics waste in Europe, that depends on the frequent use of these materials in packaging applications. This paper analyze the recycling effect on the mechanical properties of high and low density polyethylene (HDPE and LDPE). A mechanical recycling process was tested for the plastics waste of high and low density polyethylene, then a tensile and impact tests were performed on different mixing ratios for each of the both materials ranging from 100% of the virgin material and up to 100% of the recycled material with a difference of 10% of the sample to the other. This paper discusses the tensile properties of tensile stress at the fracture, elongation and modulus of elasticity and the impact test results for HDPE and LDPE were compared with each other.

Mechanical Recycling of Low-Density Polyethylene/Carbon Nanotube Composites and its Effect on Material Properties

2019 ◽  
Author(s):  
Felicia Stan ◽  
Nicoleta-Violeta Stanciu ◽  
Catalin Fetecau ◽  
Ionut-Laurentiu Sandu
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotube ◽  
Injection Molding ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Mechanical Recycling ◽  
Multi Walled Carbon Nanotube ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites ◽  
The Impact

Abstract In this paper, the impact of recycling and remanufacturing on the behavior of low-density polyethylene/multi-walled carbon nanotube (LDPE/MWCNT) composites is investigated. LDPE/MWCNT composites with 0.1–5 wt.%, previously manufactured by injection molding, were mechanically recycled and remanufactured by injection molding and 3D filament extrusion, and the rheological, electrical, and mechanical properties were analyzed and compared with those of virgin composites under the same conditions. Experimental results demonstrate that the recycled LDPE/MWCNT composites have similar rheological, electrical, and mechanical properties to virgin composites, if not better. Therefore, the recycled LDPE/MWCNT composites have a great potential for being used in engineering applications, while reducing the environmental impact.

Mechanical Recycling of Low-Density Polyethylene/Carbon Nanotube Composites and Its Effect on Material Properties

2019 ◽  
Vol 141 (9) ◽  
Author(s):  
Felicia Stan ◽  
Nicoleta-Violeta Stanciu ◽  
Catalin Fetecau ◽  
Ionut-Laurentiu Sandu
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotube ◽  
Injection Molding ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Mechanical Recycling ◽  
Multi Walled Carbon Nanotube ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites ◽  
The Impact

In this paper, the impact of recycling and remanufacturing on the behavior of low-density polyethylene/multi-walled carbon nanotube (LDPE/MWCNT) composites is investigated. LDPE/MWCNT composites with 0.1–5 wt%, previously manufactured by injection molding, were mechanically recycled and remanufactured by injection molding and 3D filament extrusion, and the rheological, electrical, and mechanical properties were analyzed and compared with those of virgin composites under the same conditions. Experimental results demonstrate that the recycled LDPE/MWCNT composites have similar rheological, electrical, and mechanical properties as that of virgin composites, if not better. Therefore, the recycled LDPE/MWCNT composites have a great potential for being used in engineering applications, while reducing the environmental impact.

Effects of microcrystalline cellulose on the mechanical properties of low-density polyethylene composites

2018 ◽  
Vol 32 (3) ◽  
pp. 297-311 ◽  
Author(s):  
Yousef Ahmad Mubarak ◽  
Raghda Talal Abdulsamad
Keyword(s):  
Mechanical Properties ◽  
Elastic Modulus ◽  
Impact Strength ◽  
Tensile Properties ◽  
Microcrystalline Cellulose ◽  
Weight Fraction ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Ldpe Composites ◽  
The Impact

This work was intended to provide an understanding of the effect of microcrystalline cellulose (MCC) on the mechanical properties of low-density polyethylene (LDPE). The impact resistance and the tensile properties of low-density LDPE/MCC composites were investigated. The weight fraction of MCC was varied at (0, 0.5, 1, 2.5, 5, 10, 20, and 30 wt%). The obtained blends were then used to prepare the required tensile and impact testing samples by hot compression molding technique. It has been found that MCC has a strong influence on the mechanical properties of LDPE. At a low MCC weight fraction, there was a little improvement in the ultimate strength, fracture stress, and elongation at break, but at a high MCC weight fraction, the tensile properties were deteriorated and reduced significantly. The addition of 1 wt% MCC to LDPE enhanced the mentioned properties by 10, 25, and 6%, respectively. While at 30 wt% MCC, these properties were lowered by 36, 25, and 96%. The elastic modulus of LDPE composites was improved on all MCC weight fractions used in the study, at 20 wt% MCC, an increase in the elastic modulus by 12 folds was achieved. On the other hand and compared with the impact strength of pure LDPE, the addition of MCC particles enhanced the impact strength, the highest value obtained was for LDPE composites filled with 10 wt% MCC where the impact strength enhanced by two folds.

scholarly journals KESAN PENAMBAHAN HABUK KAYU CENGAL TERHADAP SIFAT KEKERASAN LDPE (Low Density Polyethylene)

2016 ◽  
Vol 4 (1) ◽  
pp. 1-16
Author(s):  
MOHD SOBRI BIN HUSSIN ◽  
SHAMSUDDIN BIN ABDULLAH ◽  
AHMAD FARUDZI BIN AZIB
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Wood Waste ◽  
Low Density Polyethylene ◽  
Wood Dust ◽  
Low Density ◽  
Test Results ◽  
Natural Materials ◽  
Mixture Samples

AbstrakKajian ini melibatkan Polietelena Berketumpatan Rendah (LDPE) diadun dengan bahan tambah iaituhabuk kayu Cengal (HK). Habuk kayu dapat dimajukan, ini kerana sisa kayu dapat mengurangkankos penggunaan bahan asli dalam pengeluaran. Lantaran itu, kajian dilakukan berhubung dengankekekerasan sesuatu bahan campuran yang dihasilkan. Oleh itu, satu kajian dilakukan bagi menentukankesan penambahan habuk kayu terhadap kekerasan bahan LDPE yang akan dihasilkan. Kajian dilakukandengan melihat kesan ke atas penambahan habuk kayu dengan sifat LDPE tulen. Pemerhatian dilakukanterhadap sifat mekanikal LDPE yang dikurangkan kuantiti jisimnya dengan nisbah penambahan habukkayu sebanyak 3, 6, 9, 12 dan 15 peratus. Habuk kayu diayak menerusi pengayak yang bersaiz 200?m dan ditimbang mengikut campuran penambahan. Sampel dihasilkan menggunakan mesin suntikanpanas bagi tujuan ujian kekerasan. Keputusan ujian dianalisa bertujuan untuk membuat perbandingandengan 100% LDPE dengan peratusan HK yang ditetapkan. Ujian kekerasan secara keseluruhannyameningkat. Peningkatan paling tinggi adalah pada sampel 12% HK iaitu sebanyak 8.2%. Dalam kajianini kekerasan bahan meningkat dengan penambahan HK. Kajian lanjut tentang kekuatan bahan bolehditeruskan melalui penambahan saiz partikel pengisi yang lebih halus.   AbstractThe study involved Low Density Polyethylene (LDPE) blended with additive that is sawdust Cengal (HK).Sawdust can be developed, because wood waste can reduce the use of natural materials in production.Thus, a study was undertaken in relation to the hardness of the produced mixture. Therefore, a study wasconducted to determine the effect of wood dust on he hardness of the produced mixture LDPE material tobe produced. The study was undertaken by looking at the effect of adding the quantity of sawdust to thenature of pure LDPE. Observations were made on the mechanical properties of LDPE when the quantityof mass is reduced by increasing the sawdust ratio from 3 to 6, 9, 12 and 15 percent. Sawdust was siftedthrough a sieve with the size of 200 ?m and weighed by the addition of a mixture. Samples for hardnesstest were produced by using injection hot machine. The test results are analyzed in order to make acomparison with 100 % LDPE with HK prescribed percentage. (It is found that overall, the hardness of theproduced mixture has increase. The highest increase (8.2 %) was shown by the 12%HK sample). In thisstudy, the hardness increased with the addition of HK. Further study of the strength of the material can bepursued through the addition of finer particle size filler.

scholarly journals Toward the development of polyethylene photocatalytic degradation

2020 ◽  
Vol 40 (2) ◽  
pp. 181-191 ◽  
Author(s):  
Parisa Kamalian ◽  
Saied Nouri Khorasani ◽  
Amir Abdolmaleki ◽  
Mehdi Karevan ◽  
Shahla Khalili ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Photocatalytic Degradation ◽  
Zno Nanoparticles ◽  
Photocatalytic Performance ◽  
Nanocomposite Films ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Test Results ◽  
Zno Particles

AbstractIn this research, the photocatalytic degradation performance in a commercial low-density polyethylene (LDPE) film was investigated in the presence of zinc oxide (ZnO) nanoparticles grafted with two amounts of polyacrylamide. Fourier-transform infrared spectroscopy (FTIR) besides thermogravimetric analysis (TGA) test results reinforced the successful grafting of polyacrylamide to the extent of 10 and 39 wt.% on the ZnO nanoparticles. The photocatalytic degradation of the films under ultraviolet (UV) radiation was evaluated by characterizing the mechanical properties, weight loss, and morphology. The UV absorption and emission for ZnO nanoparticles were increased after grafting with 10% polyacrylamide. The tensile strength of the nanocomposite films increased with the incorporation of nanoparticles. The presence of ZnO nanoparticles in LDPE films increased the rate of degradation after 200 h of irradiation. The polyacrylamide grafting improved the dispersion of ZnO particles in LDPE matrix, whereas the increase of grafting extent from 10 to 39 wt.% reduced the photocatalytic performance of ZnO nanoparticles.

Aromatic Diamines as Cooperative Compatibilizers and Impact Modifiers in LDPE/HIPS Blends

2005 ◽  
Vol 13 (3) ◽  
pp. 313-320
Author(s):  
J. Pospíšil ◽  
D. Michálková ◽  
I. Fortelný ◽  
Z. Kruliš ◽  
M. Šlouf
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
High Impact ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Mechanical Recycling ◽  
Aromatic Diamines ◽  
Plastics Recycling ◽  
Compatibilization Effect ◽  
Styrene Butadiene

Mechanical recycling emerged among other plastics recycling approaches as a profitable method. Its feasibility has enhanced by understanding of reasons of lower mechanical properties of aged materials in comparison with virgin materials, and by a proper exploitation of the knowledge of compatibilization and stabilization additives for upgrading of reused materials. This study deals with low density polyethylene (LDPE). Impact strength of recycled or pre-aged (recyclate model) LDPE / high-impact polystyrene (HIPS) blends compatibilized with styrene-butadiene copolymer / ethylene-propylene elastomer was enhanced and fineness of the phase structure of the system was improved by using N,N'-disubstituted 1,4-phenylenediamine co-additives. Mechanism of the strong synergistic compatibilization effect was explained by LDPE grafting with styrene-butadiene copolymer mediated by the bifunctional amine additive.

Changes of Some Mechanical Properties of Different Low-Density Polyethylene (LDPE) Films during the Service Life

2017 ◽  
Vol 33 (6) ◽  
pp. 913-918 ◽  
Author(s):  
Nefise Yasemin Emekli ◽  
Kenan Büyüktas ◽  
Ali Basçetinçelik
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Service Life ◽  
Impact Resistance ◽  
Physical Structure ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Elongation At Break ◽  
Greenhouse Cultivation ◽  
The Impact

Abstract. In this study, changes on some mechanical properties such as impact resistance, tensile strength, and elongation at break of the low density polyethylene (LDPE) greenhouse films produced by CO-EX technology were investigated under natural weathering conditions during their service life of 24 months. With multi-layered UV+IR+EVA and UV+IR+EVA+AF-added two different type greenhouse cover films were used as a material. For this purpose, a construction with a slope roof of 26.5° was used. Initially, the impact resistances of UV+IR+EVA and UV+IR+EVA+AF films were determined as 1161.4 and 1164.1 g, respectively. But at the end of 24 months, it was determined that the impact resistance of these films reduced as 45.5% and 38.8%, respectively. In addition, tensile strength of the films decreased by 3.5% and 8.5% and the value of elongation at break decreased by 14% and 12%, respectively, at the end of 24 months period. The results showed that the physical structure of the films changed from the elastic form to the fragile form at the end of product life depending on environmental conditions and aging. This situation is very important for all manufacturers who engaged in greenhouse cultivation in Antalya where the greenhouse cultivation is common. Keywords: Aging, Impact strength, Low-density polyethylene film, Mechanical properties, Tensile strength.

scholarly journals Low-Temperature Mechanical Properties of High-Density and Low-Density Polyethylene and Their Blends

Polymers ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1821
Author(s):  
Ildar I. Salakhov ◽  
Nadim M. Shaidullin ◽  
Anatoly E. Chalykh ◽  
Mikhail A. Matsko ◽  
Alexey V. Shapagin ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Impact Strength ◽  
Relative Elongation ◽  
High Density ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Elongation At Break ◽  
Subzero Temperatures ◽  
Izod Impact

Low-temperature properties of high-density polyethylene (HDPE), low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), and their blends were studied. The analyzed low-temperature mechanical properties involve the deformation resistance and impact strength characteristics. HDPE is a bimodal ethylene/1-hexene copolymer; LDPE is a branched ethylene homopolymer containing short-chain branches of different length; LLDPE is a binary ethylene/1-butene copolymer and an ethylene/1-butene/1-hexene terpolymer. The samples of copolymers and their blends were studied by gel permeation chromatography (GPC), differential scanning calorimetry (DSC), 13С NMR spectroscopy, and dynamic mechanical analysis (DMA) using testing machines equipped with a cryochamber. It is proposed that such parameters as “relative elongation at break at −45 °C” and “Izod impact strength at −40 °C” are used instead of the ductile-to-brittle transition temperature to assess frost resistance properties because these parameters are more sensitive to deformation and impact at subzero temperatures for HDPE. LLDPE is shown to exhibit higher relative elongation at break at −45 °C and Izod impact strength at −20 ÷ 60 °C compared to those of LDPE. LLDPE terpolymer added to HDPE (at a content ≥ 25 wt.%) simultaneously increases flow properties and improves tensile properties of the blend at −45 °C. Changes in low-temperature properties as a function of molecular weight, MWD, crystallinity, and branch content were determined for HDPE, LLDPE, and their blends. The DMA data prove the resulting dependences. The reported findings allow one to understand and predict mechanical properties in the HDPE–LLDPE systems at subzero temperatures.

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