Temat: recyclate - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Examination of shredding process parameters and the properties of recyclate
Autorzy:: Głogowska, K.
Rozpędowski, J.
Tematy:: injection moulding
polypropylene
shredding
recyclate; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/102551.pdf Link otwiera się w nowym oknie
Opis:: Shredding is the component of the most important techniques of mechanical recycling of polymeric materials. It is often used as one of the main preparatory processes, associated with the constitution of composite materials. This means that it is a very important and current problem to be solved in terms of technology, design, and economy, as well as environmental protection. A preparation of composite material components by shredding depends specfically on the expected degree of fineness, appropriate size distribution and desired morphology of an elementary particle. The subject of this work concerns mechanical shredding of polymeric materials in various types of mills and agglomerators. The paper presents the tests for verifying the influence of size and shapes of openings in sieves made in the shredder on selected parameters and properties of the obtained recyclate. During the shredding process, the following parameters were analysed: electricity consumption, temperature inside the shredding chamber and the temperature of the obtained recyclate. Selected properties of the obtained recyclate, such as: geometric features of the recyclate dependent on the applied sieves, bulk density and the angle of natural repose were also determined. Mouldings with a gating system, made of polypropylene, were the subject of shredding.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Research on the Causes of Cracking of Pipes Derived from Recirculated Polyethylene
Autorzy:: Samujło, Bronisław
Longwic, Filip
Lavorgna, Marino
Tematy:: polyethylene recyclate
pipes
fatigue crack
phase transformations; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/2181748.pdf Link otwiera się w nowym oknie
Opis:: The objectives of the research was to determine the causes of cracks in pipes made of high-density polyethylene (HDPE) regranulate during their storage. A visual assessment of the cracks was carried out and their fatigue nature was found. Due to the insufficient information on the composition and properties of the processed regranulate, tests were carried out on the density distribution and mass flow rate of plastic samples taken from various areas of the pipe wall. Comparative tests were performed using infrared spectrophotometry of a plastic sample taken from a pipe, commercial HDPE and commercial polypropylene (PP) by attenuated total reflection/Fourier-transform infrared spectroscopy (ATR-FTIR), thermogravimetry (TG) and differencial scaning calorimetry (DSC) method. There were differences in density and flow rate depending on the distance from the outer surface of the pipe, reaching several percent. Based on the conducted spectroscopic, thermogravimetric and differential scanning calorimetry studies, none of the expected plastics contamination, mostly PP, has been found in recirculated polyethylene. Futhermore, the expected decrease in the temperature of phase transformations and the beginning of decomposition of polyethylene (PE) after recycling, compared to the original one, were visible. Possible causes of cracks were considered to be differences in the PE structure in the pipe wall and the occurrence of possible porous structures, which when storing pipes in variable load and temperature conditions could cause the propagation of microcracks.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Resistance to aging research in sea water composites with the polyester-glass recyclate
Autorzy:: Hajdukiewicz, G.
Panasiuk, K.
Kyzioł, L.
Tematy:: recycling
polyester-glass recyclate
aging of composites
tensile test; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/949506.pdf Link otwiera się w nowym oknie
Opis:: Composites are materials used for various types of constructions in the automotive industry, aviation, and shipbuilding. Due to the wide use of these materials, there is a problem with their recycling. Such material requires appropriate processing technology, which has been developed to obtain a recyclate with a specific granulation. The use of hand laminating technology made composites with the addition of polyester and glass recyclate with granulation of 1.2, as well as content: 0%, 20%, 30%. These types of materials are exposed to various types of atmospheric factors that affect their durability. Aging is defined as changes in the composite when exposed to atmospheric conditions, such as sunlight, temperature, thermal cycles, water in various forms and wind. This article uses recycled polyester and glass composites to investigate the effect of aging in seawater on their strength properties. These tests can be used to pre-assess the applicability of newly developed materials as construction or protective coatings. They were carried out on a specially prepared station for accelerated tests, with elevated temperature (35ºCC), as well as brine spray imitating sea atmosphere. The method is used to accelerate the aging processes occurring in composite materials. Samples were subjected to cycles of 5, 30 and 60 days respectively. Samples were weighed and measured before and after each cycle. In order to investigate the effect of aging on strength properties, the composites underwent a static tensile test in accordance with the standard for plastics. Studies have shown that as a result of the aging process, the strength properties decrease slightly, which affects the favourable assessment of these materials as constructional.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Analysis of the cracking process of layered composites with polyester-glass recyclate using dynamic tests
Autorzy:: Panasiuk, Katarzyna
Kyzioł, Lesław
Hajdukiewicz, Grzegorz
Tematy:: polyester-glass recyclate
composites
dynamic tests
toughness
cracking process
defects; Pokaż więcej
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Powiązania:: https://bibliotekanauki.pl/articles/135362.pdf Link otwiera się w nowym oknie
Opis:: Layered composites are materials that are widely used in industry due to their low manufacturing costs. They are used, among others, as a construction material for the construction of light aircraft, cars, wind turbine blades and the hulls of vessels. The universality of their use has contributed to the formation of a large amount of post-production and post-use waste from these composites. Layered composites, using recycled polyester and glass, or recycled composite waste, may be materials that could be used in the economy. The polyester-glass waste used in the composite was created by crushing and then grinding and sieving to obtain the appropriate granulation. Materials with a waste content of 0%, 10%, 20% and with granulation of this waste of ≤ 1.2 mm were made using the hand lamination method. Test specimens were prepared from the material plates that were obtained in accordance with the PN-EN ISO 179-1: 2010E standard (Plastics – Charpy Impact Assessment – Part 1: Non-instrumental impact test). Impact tests of samples were carried out according to the above-mentioned standards using a Zwick Roell RKP450 swinging hammer. Test bench instrumentation and software enabled the bending forces to be recorded, as well as the deflection of the samples for short time intervals and displacement, so a detailed force-deflection graph could be obtained. During the analysis, the results of the research were focused on describing the kinetics of the process where the samples were destroyed (fracture mechanics), this allowed for the initial determination of the material’s resistance to dynamic loads. The results obtained showed that the increase of the recycled content in the produced composite contributed to the lowering of the destructive force threshold in the impact tests, as well as the simultaneous increase of the plasticity of the material. The increase of the sample’s deflection with the occurrence of the maximum force resulted in the energy of the elastic state being increased (Ue).
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Composite materials for warship constructions
Autorzy:: Kyzioł, Lesław
Tematy:: polyester-glass composites
recyclate
modified wood
non-magnetic warships isotropic; Pokaż więcej
Wydawca:: Instytut Techniczny Wojsk Lotniczych
Powiązania:: https://bibliotekanauki.pl/articles/245851.pdf Link otwiera się w nowym oknie
Opis:: The article presents the basic properties of composite materials used for the construction of special ships. Static and dynamic characteristics of materials such as wood and polyester-glass composites are presented. Noteworthy are materials such as surface modified wood and polyester-glass composites with the addition of recyclate. Composite materials are widely used materials for the construction of non-magnetic warships. The article describes the properties of surface modified wood with polymethyl methacrylate and a polyester-glass composite with the addition of recyclate. The recyclate is fragmented, milled polyester-glass scrap. The content of the recyclate greatly affects the mechanical properties of the composite. The properties of the composite with the addition of recyclate depend on the recyclate content as well as the production technology and size of the recycled granulates. The test results showed that the increase in the recycled content causes a decrease in the mechanical properties of the composite. However, it should be remembered that these materials originated from waste, waste that is not subject to self-degradation, which have a very negative impact on the natural environment. At present, where there is a very large pollution of the natural environment, the processing and management of huge amounts of composite waste is an essential goal. A significant amount of recyclate significantly reduces the mechanical properties of the composite; however, the same large amount of recycled material has been transformed and used. The manufactured material and its structural elements are still non-magnetic structures and can be used on a less loaded element. The choice of material for the construction of special ships elements is determined not only by its properties but also by knowledge, experience, method of processing, economic and technical risk.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Material tests of composite rings with recyclates for pipe flange connections
Autorzy:: Wróbel, G.
Kalicki, M.
Walczak, K.
Tematy:: composite
recyclate
characteristics of resins
loose ring
pipe flange connections; Pokaż więcej
Wydawca:: Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Powiązania:: https://bibliotekanauki.pl/articles/59122533.pdf Link otwiera się w nowym oknie
Opis:: Purpose: This study aims to determine the material properties of the structural components of the composite ring material for pipe flange connections. Design/methodology/approach: The study included structural components, in particular resins and composites based on them, characterised by the share of recyclate in the form of post-production waste composites with different degrees of fineness. Findings: The study results include the physical characteristics of resins and mechanical characteristics of composite materials based on their matrix, using fillers of different compositions and granulation. Practical implications: The research results are the material-structural solutions of rings meeting the strength and functional performance criteria of rings intended for circular pipe connections. Originality/value: Determination of structural components of composite for loose rings in pipe flange connections. The achievement of the research is the identification of the most favourable combinations of component materials of composites for rings in structural solutions for pipe flange connections using loose rings.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Influence of the content of a glass-polyester recycled additive on the properties of layered composites in dynamic tests
Autorzy:: Panasiuk, K.
Hajdukiewicz, G.
Tematy:: polyester-glass waste
recyclate
new composites
new materials
hand laminating
toughness; Pokaż więcej
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Powiązania:: https://bibliotekanauki.pl/articles/135154.pdf Link otwiera się w nowym oknie
Opis:: Polyester-glass composites are widely used in many industries, in various types of constructions, including dynamically loaded ones. This article examines the influence of the content of a glass-polyester recycled additive on the strength properties of layered composites. The recyclate was polyester-glass waste, which was pre-crushed and then milled into the appropriate fractions. Manual laminating technology was used to make the materials. The composite materials were made with a waste content of 0%, 10%, 20% and granulations of ≥ 1.2 mm and ≥ 3 mm. Samples for testing were prepared in accordance with the PN-EN ISO 179-1: 2010E standard (Plastics – Charpy Impact Assessment – Part 1: Non-instrumental impact test). Impact tests of the samples were performed using the Charpy method with the Zwick Roell RKP450 swinging hammer. The test results showed that the addition of polyester-glass recyclate, its content %, and its granulation size, have an impact on the composite resistance to loads in dynamic tests.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Poli(tereftalan etylenu) do zastosowania w układach elektronicznych
Poly(ethylene terephthalate) for use in electronic circuits
Autorzy:: Kadac, K.
Nowaczyk, J.
Tematy:: poli(tereftalan etylenu)
recyklat
właściwości elektryczne
poly(ethylene terephthalate)
recyclate
electrical properties; Pokaż więcej
Wydawca:: Sieć Badawcza Łukasiewicz - Instytut Inżynierii Materiałów Polimerowych i Barwników
Powiązania:: https://bibliotekanauki.pl/articles/278152.pdf Link otwiera się w nowym oknie
Opis:: Poli(tereftalanu etylenu) - PET - jest polimerem o bardzo dobrych właściwościach izolujących (ρ=10-11 Ω m-1). Przedmiotem niniejszej publikacji jest analiza właściwości PET w formie czystego materiału polimerowego oraz recyklatu. Poli(tereftalanu etylenu) badany był w postaci układów z naniesionymi dwustronnie kontaktami wykonanymi ze srebra lub nanosrebra. Dla otrzymanych struktur warstwowych na bazie folii PET przeprowadzono badania charakterystyk prądowo-napięciowych i pomiary przewodności właściwej. Szczegółowa analiza przygotowanych warstw i struktur powstających na bazie opisywanych tworzyw uzasadniona jest przede wszystkim przez wzgląd na potencjalne zastosowania PET w obszarze tzw. „przezroczystej elektroniki”.
Poly(ethylene terephthalate) - PET - is a polymer with excellent insulating properties (ρ=10-11 Ω m-1). In this paper, the properties of virgin and recycled polymer film were applied to form the multilayer structures with metal contacts made of silver or nanosilver. Resulting structures were subjected to analysis of electronic properties. For this purpose, current-voltage characterization and the measurement of the tested materials conductivity was carried out. The detailed analysis of the prepared layers and structures formed on the basis described materials is focused on future potential applications in the "transparent electronics".
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Wtórne wykorzystywanie recyklatów kopolimerów jonomerowych E/MAA uzyskanych przez rozdrobnienie w obniżonej temperaturze
Secondary use of ionomeric recyclate E/MAA obtained by grinding at low temperature
Autorzy:: Sykutera, D.
Bieliński, M.
Czyżewski, P.
Kościuszko, A.
Tematy:: kopolimery monomerowe
recykling
recyklat
wtryskiwanie
transmisyjność
ionomeric copolymers
recycling
recyclate
injection molding
transmissivity; Pokaż więcej
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Powiązania:: https://bibliotekanauki.pl/articles/2073030.pdf Link otwiera się w nowym oknie
Opis:: Przedstawiono sposób zagospodarowania odpadów kopolimeru jonomerowego (E/MAA) pod nazwą handlową Surlyn® (Du-Pont). Prezentowane wyniki badań stanowią istotny fragment prac nad zagospodarowaniem odpadów jonomerowych, powstałych podczas produkcji grubościennych nasadek kosmetycznych. Zaproponowano taki sposób realizacji wtórnego przetwórstwa, który zapewnia uzyskanie transmisyjności i wybranych właściwości mechanicznych wyprasek na podobnym poziomie jak wytworzone z oryginalnego granulatu (up-cycling). Wykazano, że schłodzenie nadawy przed rozdrobnieniem nie ma istotnego wpływu na transmisyjność, wytrzymałość na rozciąganie oraz udarność wyprasek wtórnych.
The way of ionomeric copolymer (E/MAA) recycling under the trade name Surlyn® (DuPont) is presented. Results of investigations constitute a crucial part of the research concerning management of ionomeric waste, being by-products of the production of thick-walled cosmetic caps. The proposed type of secondary process ensures that the injection parts obtain transmissivity and chosen mechanical properties similar to those of moldings from original pellets (upcycling). It was also proved that feed cooling before the grinding does not have a significant influence on transmissivity, tensile strength and impact strength of mol-dings made from recycled material.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Use of 3d optical techniques in the analysis of the effect of adding rubber recyclate to the matrix on selected strength parameters of epoxy–glass composites
Autorzy:: Charchalis, Adam
Kneć, Marcin
Żuk, Daria
Abramczyk, Norbert
Tematy:: epoxy–glass composite
ARAMIS SRX
static tensile test
rubber recyclate
3D optical techniques; Pokaż więcej
Wydawca:: Politechnika Białostocka. Oficyna Wydawnicza Politechniki Białostockiej
Powiązania:: https://bibliotekanauki.pl/articles/2233711.pdf Link otwiera się w nowym oknie
Opis:: The article presents a method of modifying the strength properties of epoxy–glass composite by changing the percentage composition of the matrix by the addition of rubber recyclate. Taking into account environmental protection and economic conditions in the process of recycling and utilisation of waste, it is advisable to look for applications of non-degradable waste materials. Based on epoxy resin, a glass mat with a random direction of fibres and rubber recyclate, a test material with different percentage compositions was produced. Samples from the manufactured materials were subjected to a static tensile test on a ZwickRoell testing machine using the ARAMIS SRX measuring system. In addition, CT (computerized tomography) scans of the inside of the samples were made using a ZEISS METROTOM 6 Scout tomograph, and observations of the internal structures were made using a scanning electron microscope. The use of optical and microscopic techniques enabled the precise determination of strength parameters of the examined composites and the analysis of the behaviour of samples under load. The analysis of deformations over time in the examined samples showed a beneficial effect of the addition of rubber recyclate on the elastic properties of the examined composites.
Dostawca treści:: Biblioteka Nauki

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