scholarly journals Development of Polypropylene/Polyethylene Terephthalate Microfibrillar Composites Filament to Support Waste Management

Polymers ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 233 ◽  
Author(s):  
Abdulhakim Almajid ◽  
Rolf Walter ◽  
Tim Kroos ◽  
Harry Junaidi ◽  
Martin Gurka ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Waste Management ◽  
Mechanical Behavior ◽  
Polyethylene Terephthalate ◽  
Melt Temperature ◽  
Chamber Temperature ◽  
Microfibrillar Composites ◽  
Stretching Ratio ◽  
The Relationship ◽  
Properties Of Composites

The concept of microfibrillar composites (MFCs) is adopted to produce composites of polyethylene terephthalate (PET) fiber-reinforced polypropylene (PP) materials. The two polymers were dry mixed with PET content ranging from 22 to 45 wt%. The PET has been used as a reinforcement to improve the mechanical properties of composites. The relationship between the morphology of the MFC structure and the mechanical behavior of the MFC filament was investigated. Analysis of the structure and mechanical behavior helped to understand the influence of the stretching ratio, extruder-melt temperature, stretching-chamber temperature, and filament speed.

scholarly journals Mechanical and structural properties of composites made from recycled and virgin polyethylene terephthalate (PET) and metal chip or mesh wire

2019 ◽  
Vol 299 ◽  
pp. 06007
Author(s):  
Mircea Aurelian Antoniu Rusu ◽  
Sever-Adrian Radu ◽  
Catalin Moldovan ◽  
Codruta Sarosi ◽  
Ionela Amalia Mazilu (Moldovan) ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Polyethylene Terephthalate ◽  
Processing Parameters ◽  
Sem Images ◽  
Major Drawback ◽  
Recycled Pet ◽  
Plastic Processing ◽  
Metal Chip ◽  
Intense Research ◽  
Properties Of Composites

Although polyethylene terephthalate (PET) is a champion of recycling, intense research is being done to find new solutions for using recycled plastic. This study aims to characterize the mechanical andstructural properties (SEM- scanning electron microscopy) of products made from recycled metal swarf or mesh wire with recycled plastic (PET) in comparison with virgin plastic. Samples manufactured from virgin and recycled PET are made by pressing and high temperature. The loss of mechanical properties ofproducts made from recycled plastic is a major drawback that influences their use. SEM images confirm that the dispersion and distribution of the PET phase is not very uniform. By addition of virgin plastic in various compositions with recycled plastic, processing parameters and mechanical properties can be optimized.

Mechanical Properties Evolution of Polydimethylsiloxane During Crosslinking Process

2006 ◽  
Vol 975 ◽  
Author(s):  
Yi Zhao ◽  
Xin Zhang
Keyword(s):  
Mechanical Properties ◽  
Mechanical Behavior ◽  
Measurement System ◽  
Curing Agent ◽  
Operational Parameters ◽  
Crosslinking Process ◽  
Sensing Applications ◽  
Curvature Measurement ◽  
The Relationship ◽  
Mechanical Sensing

ABSTRACTThis paper reports mechanical properties evolution of polydimethylsiloxane (PDMS) during the crosslinking process. In this work, PDMS crosslinking was induced by mixing base prepolymer and curing agent at certain ratios. The liquid prepolymer was spun coated on a silicon wafer, and the curvature change of the wafer was measured continuously using a curvature measurement system. The relationship between the curvature change and typical mechanical properties was investigated using a bilayer model; and the evolution of the properties was derived, as a function of operational parameters. This work is expected to help better understanding of the crosslinking process and provide practical strategies for controlling the mechanical behavior of the resulting polymer structures, especially those for mechanical sensing applications.

Influence of pyrolytic thermal history on olive pruning biochar and related epoxy composites mechanical properties

2019 ◽  
Vol 54 (14) ◽  
pp. 1863-1873 ◽  
Author(s):  
Mattia Bartoli ◽  
Muhammad Abid Nasir ◽  
Pravin Jagdale ◽  
Elisa Passaglia ◽  
Roberto Spiniello ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Thermal History ◽  
Morphological Analysis ◽  
Epoxy Composites ◽  
Heating Rates ◽  
History Of ◽  
Olive Cultivation ◽  
The Relationship ◽  
High Treatment ◽  
Properties Of Composites

Olive pruning is waste from olive cultivation and is generally disposed of through incineration. Olive pruning can, however, be salvaged by pyrolysis, which also produces an interesting carbon-based material known as biochar. Biochar has been proved as a suitable filler which improves the mechanical properties of epoxy composites. Despite this, literature has few studied focused on the relationship between biochar thermal history and the properties it induces in related biochar containing composites. In this work, we report a morphological analysis of biochar produced at different pyrolytic high treatment temperatures (400℃, 600℃, 800℃, and 1000℃) using different heating rates (5℃/min, 15℃/min, and 50℃/min). We investigate the effect of different biochar morphology on the biochar epoxy-related composites, proving the tuneability of the mechanical properties of composites according to the thermal history of the biochar employed.

scholarly journals Crystal structure, hydrogen bonding, mechanical properties and Raman spectrum of the lead uranyl silicate monohydrate mineral kasolite

RSC Advances ◽  
2019 ◽  
Vol 9 (27) ◽  
pp. 15323-15334 ◽  
Author(s):  
Francisco Colmenero ◽  
Jakub Plášil ◽  
Joaquín Cobos ◽  
Jiří Sejkora ◽  
Vicente Timón ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Mechanical Properties ◽  
Hydrogen Bonding ◽  
Raman Spectrum ◽  
Mechanical Behavior ◽  
New Method ◽  
Complex Crystal Structure ◽  
Detailed Interpretation ◽  
The Relationship ◽  
Complex Crystal

A profound understanding of the relationship between the complex crystal structure of kasolite and its mechanical behavior is provided. A detailed interpretation of its Raman spectrum and a new method for band resolution are reported.

scholarly journals Impedance of tissue-mimicking phantom material under compression

2019 ◽  
Vol 4 (1) ◽  
pp. 2-12 ◽  
Author(s):  
Barry Belmont ◽  
Robert E. Dodde ◽  
Albert J. Shih
Keyword(s):  
Mechanical Properties ◽  
Electrical Properties ◽  
Soft Tissue ◽  
Porous Structure ◽  
Mechanical Behavior ◽  
Biological Tissues ◽  
Stress And Strain ◽  
The Relationship ◽  
Passive Electrical Properties ◽  
Phantom Material

Abstract The bioimpedance of tissues under compression is a field in need of study. While biological tissues can become compressed in a myriad of ways, very few experiments have been conducted to describe the relationship between the passive electrical properties of a material (impedance/admittance) and its underlying mechanical properties (stress and strain) during deformation. Of the investigations that have been conducted, the exodus of fluid from samples under compression has been thought to be the cause of changes in impedance, though until now was not measured directly. Using a soft tissue-mimicking phantom material (tofu) whose passive electrical properties are a function of the conducting fluid held within its porous structure, we have shown that the mechanical behavior of a sample under compression can be measured through bioimpedance techniques.

scholarly journals Properties of Polyethylene Terephthalate (PET) after Thermo-Oxidative Aging

Materials ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 3833
Author(s):  
Robert Panowicz ◽  
Marcin Konarzewski ◽  
Tomasz Durejko ◽  
Mateusz Szala ◽  
Magdalena Łazińska ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Polyethylene Terephthalate ◽  
Morphological Observation ◽  
Melt Temperature ◽  
Elongation At Break ◽  
Aged Material ◽  
Oxidative Aging ◽  
Lamellar Crystals ◽  
Fracture Character ◽  
Crystalline Polyethylene

The influence of the thermo-oxidative aging semi-crystalline polyethylene terephthalate process on the thermal and mechanical properties was analysed in the article. For this purpose, PET was aged at 140 °C for 21, 35 and 56 days. The research showed that as a result of aging, the amount of the crystalline phase increases by about 8%, which translates into the properties of the aged material. The glass transition and melt temperature of lamellar crystals formed during first and second crystallisation increase with aging. The mechanical properties of the material were analysed in the temperature range of 25 to 75 °C. The tests were showing an increase in Young’s modulus and a decrease in elongation at the break as a result of aging. This phenomenon was particularly visible during tests at 75 °C and during the morphological observation of the fracture surface, where the fracture character of the material changes from ductile to brittle. In the case of the material aged for the longest time, the temperature has a negligible influence on the elongation at break.

Modeling of Mechanical Behavior of Porous Sintered Timing Wheel in Contact with Chain Wheels

2007 ◽  
Vol 561-565 ◽  
pp. 1649-1652
Author(s):  
M. Alizadeh ◽  
H. Khorsand ◽  
Ali Shokuhfar
Keyword(s):  
Experimental Data ◽  
Mechanical Properties ◽  
Finite Element ◽  
Tensile Strength ◽  
Mechanical Behavior ◽  
Sintered Density ◽  
Fem Model ◽  
Gear Contact ◽  
The Relationship ◽  
Good Agreement

The mechanical properties of sintered timing wheel in contact with chain wheels were analysed using Finite Element Methods (FEM), in which the timing wheel is modelled as a metal powder. The mechanical properties of sintered timing wheel were investigated as a function of sintered density. Tensile strength and Young’s modulus increased with a decrease in porosity. Current methods of calculating gear contact stresses use Hertz’s equations, which were originally derived for contact between sintered timing wheel and chain wheels. The results of the 2D dimensional FEM analyses from ANSYS are presented. The relationship between relative density of P/M steels and mechanical behavior is also obtained from FEM and compared with the experimental data. Good agreement between the experimental and FEM results is observed, which demonstrates that FEM can capture the major features of the P/M steels behaviour during loading. This indicates that the FEM model is accurate.

Mechanical behavior of particle-reinforced polyurethane composites for load-bearing drives

2019 ◽  
Vol 6 (3) ◽  
pp. 33-41
Author(s):  
Anna Porąbka ◽  
Vasiliki-Maria Archodoulaki ◽  
Jadwiga Laska
Keyword(s):  
Mechanical Properties ◽  
Impact Strength ◽  
Mechanical Behavior ◽  
Reference Materials ◽  
Physical And Mechanical Properties ◽  
Vibration Damping ◽  
Load Bearing ◽  
Ceramic Particles ◽  
Polyurethane Composites ◽  
Properties Of Composites

Two series of polyurethane composites were prepared using NDI- and MDI-based prepolymers and common polyol. NDI-based polyurethane is generally resistant to mechanical wear and rebound-resilient whereas MDI-based PU has cushioning and vibration damping features, and both types can be used as a matrix for load-bearing composites. The objective of this study was to compare the mechanical properties of composites containing 5% vol. of ceramic particles prepared with the use of the mentioned PU systems, and unmodified commercial materials. The effect of various ceramic particles on physical and mechanical properties was studied. The results showed that the mechanical properties changed in comparison to reference materials: E’ improved, and impact strength performed favorably in certain materials. Both the tensile strengths and the elongations at break of the composites were found to decrease with the content of ceramic particles; however, the hardness increased gradually. Since ceramic particles offer better stiffness and hardness, the selected composites could be a viable alternative to the pure commercial PUs available in the industry.

scholarly journals Extraction of Anisotropic Mechanical Properties From Nanoindentation of SiC-6H Single Crystals

2016 ◽  
Vol 83 (9) ◽  
Author(s):  
Amit Datye ◽  
Lin Li ◽  
Wei Zhang ◽  
Yujie Wei ◽  
Yanfei Gao ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Single Crystal ◽  
Mechanical Behavior ◽  
Peak Load ◽  
Contact Analysis ◽  
Elastic Contact ◽  
Wide Range ◽  
Anisotropic Mechanical Properties ◽  
Anisotropic Elastic ◽  
The Relationship

Because brittle solids fail catastrophically during normal tension and compression testing, nanoindentation is often a useful alternative technique for measuring their mechanical properties and assessing their deformation characteristics. One practical question to be addressed in such studies is the relationship between the anisotropy in the uniaxial mechanical behavior to that in the indentation response. To this end, a systematic study of the mechanical behavior the 6H polytype of a hexagonal silicon carbide single crystal (SiC-6H) was performed using standard nanoindentation methods. The indentation elastic modulus and hardness measured using a Berkovich indenter at a peak load of 500 mN varied over a wide range of crystal orientation by only a few percent. The variation in modulus is shown to be consistent with an anisotropic elastic contact analysis based on the known single crystal elastic constants of the material. The variation in hardness is examined using a single crystal plasticity model that considers the anisotropy of slip in hexagonal crystals. When compared to experimental measurements, the analysis confirms that plasticity in SiC-6H is dominated by basal slip. An anisotropic elastic contact analysis provides insights into the relationship between the pop-in load, which characterizes the transition from elasticity to plasticity during nanoindentation testing, and the theoretical strength of the material. The observations and analyses lay the foundations for further examination of the deformation and failure mechanisms in anisotropic materials by nanoindentation techniques.

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