scholarly journals Preparation and Properties of Sustainable Brake Pads with Recycled End-of-Life Tire Rubber Particles

Polymers ◽  
2021 ◽  
Vol 13 (19) ◽  
pp. 3371
Author(s):  
Aitana Tamayo ◽  
Fausto Rubio ◽  
Roberto Pérez-Aparicio ◽  
Leticia Saiz-Rodríguez ◽  
Juan Rubio
Keyword(s):  
End Of Life ◽  
Rubber Particle ◽  
Wear Properties ◽  
Friction Mechanism ◽  
Brake Pads ◽  
Cryogenic Grinding ◽  
Rubber Particles ◽  
Grinding Mechanism ◽  
Long Life ◽  
Life Behavior

Sustainable composite brake pads were processed by employing recycled end-of-life tire (ELT) rubber particles obtained by means of cryogenic grinding and ambient grinding. The effect of the grinding mechanism and concentration of ELT rubber particles was then reported. From the friction result test, better behavior in terms of coefficient of friction (COF) was obtained when 3% of ELT rubber particles were introduced into the composite. It was demonstrated that the size of the particles is not as determinant as the friction mechanism in the wear properties of the sustainable brake pads. Whereas, while increasing the ELT rubber particle size acts as detrimental to the COF either in the ambient or cryogenic grinding, at high friction distances, the better adhesion of the particles because of the rough surface of the particles subjected to ambient grinding enhances the long-life behavior of the composite brake pads.

scholarly journals First-Principles Model to Evaluate Quantitatively the Long-Life Behavior of Cellulose Acetate Polymers

ACS Omega ◽  
2021 ◽  
Vol 6 (12) ◽  
pp. 8028-8037
Author(s):  
Abeer Al Mohtar ◽  
Sofia Nunes ◽  
Joana Silva ◽  
Ana Maria Ramos ◽  
João Lopes ◽  
...  
Keyword(s):  
Cellulose Acetate ◽  
First Principles ◽  
Long Life ◽  
Life Behavior

Research on Modifier and Modified Process for Rubber-Particle Used in Rubberized Concrete for Road

2011 ◽  
Vol 243-249 ◽  
pp. 4125-4130 ◽  
Author(s):  
Shuai Tian ◽  
Tong Zhang ◽  
Ye Li
Keyword(s):  
Inorganic Salt ◽  
Rubber Particle ◽  
Volume Ratio ◽  
Alkaline Solutions ◽  
Rubberized Concrete ◽  
Function Mechanism ◽  
Mix Proportion ◽  
Optimum Proportion ◽  
Rubber Particles ◽  
The Impact

This paper studies the optimum proportion of rubber-particles in rubberized concrete for road, tests the impact of 12 modifiers and their modified processes in rubberized concrete and discusses the function mechanism of the modifiers in rubberized concrete. Research indicates: the optimum proportion of rubber-particles in rubberized concrete for road is low mix-proportion (volume ratio<5%); inorganic salt as modifier can markedly enhance the bonding strength between rubber-particles used in road and cement and improve the physical properties of rubberized concrete, among which CaCl2 produces the most effect; but organic solution, acidic or alkaline solutions are not fit to be used as modifiers in rubberized concrete for road.

Influence of Rubber Particle Size on Functional Properties of a Composite Material Based on Scrap Tires and a Polymer Binder

2020 ◽  
Vol 850 ◽  
pp. 107-111
Author(s):  
Laimonis Mālers ◽  
Agnija Cirvele
Keyword(s):  
Particle Size ◽  
Composite Material ◽  
Functional Properties ◽  
Material Properties ◽  
Rubber Particle ◽  
Polymer Binder ◽  
Scrap Tires ◽  
Elongation At Break ◽  
Rubber Particles ◽  
Purposeful Selection

Functional properties of composite material based on mechanically grinded scrap tires with different particle size of fractioned crumb and polyurethane type polymer binder were investigated to estimate influence of rubber particles size and content on composite material properties (Shore C hardness, compressive stress at 10 % deformation, tensile strength, elastic modulus and elongation at break, apparent density). Optimization possibilities of composite material consisting of rubber particles with different sizes or fractions were investigated. The obtained results show that variation of composition of the composite material by changing size of rubber granulate have definite influence on selected properties of the material. Purposeful selection and mutual combination of rubber particles size included in material can ensure desirable and predictable mechanical properties of composite material.

Fracture behavior and deformation mechanisms of polypropylene/ethylene-propylene-diene blends

2016 ◽  
Vol 36 (7) ◽  
pp. 695-704 ◽  
Author(s):  
Yuhui Ao ◽  
Fang Feng ◽  
Huixuan Zhang
Keyword(s):  
Electron Microscopy ◽  
Deformation Mechanism ◽  
Fracture Behavior ◽  
Rubber Particle ◽  
Shear Yielding ◽  
Ethylene Propylene ◽  
Transmission Electron ◽  
Rubber Particles ◽  
The Matrix ◽  
Matrix Shear

Abstract The fracture behavior and deformation mechanism of polypropylene (PP)/ethylene-propylene-diene rubber (EPDM) were studied by scanning electron microscopy and transmission electron microscopy analyses. The deformation mechanism was investigated under different conditions. Voids were seen under all the conditions because of matrix shear yielding, indicating that rubber particle cavitation took place during the blend fracture process; moreover, the void size and density increased as the fracture surface was approached. However, the void density and extent of elongation of the rubber particles in the deformation zone decreased with increasing test speed rate. Many voids were positioned in the rubber particles, confirming that matrix shear yielding initiated by rubber particle cavitation was the main deformation mechanism during ductile fracture in the matrix.

Efficiency of Scrap Rubber Particles on Strength of Cementitious Materials

2011 ◽  
Vol 374-377 ◽  
pp. 1374-1379 ◽  
Author(s):  
Guang Cheng Long ◽  
Zhe Li ◽  
You Jun Xie
Keyword(s):  
Loss Rate ◽  
Rubber Particle ◽  
Hydrophobic Effect ◽  
Research Programme ◽  
Strength Loss ◽  
Cementitious Materials ◽  
Mortar Sample ◽  
Deformation Effect ◽  
Rubber Particles ◽  
Set Up

An extensive research programme was set up to investigate the efficiency of scrap rubber particles on strength of cementitious materials. The index of strength loss rate of paste and mortar sample caused by increasing 1% volume rubber particles was proposed to analyze the efficiency of rubber particles in cementitious materials. And the corresponding mechanism was also discussed in this paper. Results indicate that in the investigated area, the loss rate in compressive strength both for paste and mortar almost ranges from 2% to 5% caused by increasing 1% rubber particles depending on the total volume of rubber particle added into sample. However, the loss rate in flexural strength of mortar by increasing 1% volume rubber particles is obviously different from that. Three roles of scrap rubber particles played in cementitious materials, named as deformation effect, equivalent-pore effect and hydrophobic effect, are responsible for the efficiency of scrap rubber particles on strength of cementitious material. The efficiency of rubber particles on strength of paste and mortar differs from each other due to the different microstructure between paste and mortar.

TENSILE STRESS STRAIN BEHAVIOR OF POLYPROPYLENE TOUGHENED WITH BI-MODAL SEBS

2008 ◽  
Vol 22 (09n11) ◽  
pp. 1129-1134 ◽  
Author(s):  
HIROYUKI MAE ◽  
MASAKI OMIYA ◽  
KIKUO KISHIMOTO
Keyword(s):  
Rubber Particle ◽  
Bimodal Distribution ◽  
Tensile Tests ◽  
Strong Increase ◽  
In Situ Observation ◽  
Strain Rates ◽  
Blend Ratio ◽  
Strain Behavior ◽  
Rubber Particles ◽  
Localized Plastic Deformation

The objective is to characterize the effect of the bimodal distribution of rubber particles and its blend ratio on the mechanical properties of the thermoplastic polypropylene blended with two different styrene-ethylene-butadiene-styrene tri-block copolymer (SEBS) at the intermediate and high strain rates. Tensile tests are conducted at the nominal strain rates from 10−1 to 102 (1/sec). Phase morphology is investigated to estimate the bi-modal rubber particle size distribution. In addition, the in-situ observation is conducted during uniaxially stretching within transmission electron microscopy (TEM) step by step to investigate the deformation events depending on the elongation of samples. The elastic modulus increased gradually as the blend ratio of large rubber particle increased. An increase in the rupture strain was found for the bimodal rubber-particle distributed blend system where the blend ratios of small rubber particle and large rubber particle were the same. This is because the smaller particles dominant blend systems show the band-like craze deformation while the localized plastic deformation is taken place in the larger particles dominated blend systems. The synergistic effect of these rubber particles gives rise to a strong increase in the ductility of these bimodal rubber-particle distributed polypropylene systems.

Development of a Composite Material from Agro Waste for Wear Resistance Application

2013 ◽  
Vol 773-774 ◽  
pp. 319-324 ◽  
Author(s):  
Dareddy Ramana Reddy ◽  
Banoth Balunaik
Keyword(s):  
Functional Performance ◽  
Technological Development ◽  
Palm Kernel ◽  
Stopping Time ◽  
Chemical Properties ◽  
Friction Material ◽  
Wear Properties ◽  
Palm Kernel Shell ◽  
Brake Pads ◽  
Physical And Chemical

The Friction lining is an essential part of braking system. Friction materials have their significant role for transmission in various machines. Their composition keeps on changing to keep pace with technological development and environmental requirements. Earlier asbestos has been used as a friction material because of its good physical and chemical properties. But later researchers eyed that there are many health hazards associated with asbestos handling. The average disk temperature and average stopping time for pass is increased and it has poor dimensional stability. Hence it has lost favor and several alternative materials are being replaced these days. In this work a non-asbestos bio-friction material is enlighten which is developed using an Agro-waste material palm kernel shell (PKS) along with other Ingredients. Among the agro-waste shells investigated the PKS exhibited more favorable properties. The developed friction material is used to produce automobile disk brake pads. The developed brake pads were tested for functional performance on a specially designed experimental test rig. Physical properties of this new material along with wear properties have been determined and reported in this paper. When compared with premium asbestos based commercial brake pad PKS pads were found to have performed satisfactorily in terms of amount of wear and stopping time.

Mechanical Properties of Surface Mortar with Waste Crumb Rubber

2014 ◽  
Vol 584-586 ◽  
pp. 917-920
Author(s):  
Gang Xue ◽  
Chun Feng Wu
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Rubber Particle ◽  
Impact Resistance ◽  
Crumb Rubber ◽  
Application Performance ◽  
Waste Rubber ◽  
Aging Properties ◽  
Rubber Particles ◽  
Waste Crumb Rubber

Applying modified waste rubber particle to surface mortar can give full play of the unique characteristics to utilize the waste and decrease environmental pollution. In order to study the application performance of crumb rubber mortar, five different mortar proportions are selected to determine the compressive strength, flexural strength, impact strength and thermal aging strength. The results show that rubber particles mortar possess excellent toughness, impact resistance and heat aging properties.

scholarly journals Proposal to Reuse Rubber Waste from End-Of-Life Tires Using Thermosetting Resin

2019 ◽  
Vol 11 (24) ◽  
pp. 6997 ◽  
Author(s):  
Andre Hekermann Buss ◽  
João Luiz Kovaleski ◽  
Regina Negri Pagani ◽  
Vander Luiz da Silva ◽  
Jaqueline de Matos Silva
Keyword(s):  
End Of Life ◽  
Experimental Work ◽  
Chemical Elements ◽  
Motor Vehicles ◽  
Tire Rubber ◽  
Practical Applications ◽  
Resin Catalyst ◽  
Rubber Waste ◽  
Rubber Particles ◽  
Work Samples

Due to the increasing production of motor vehicles, a large amount of waste with different characteristics and compositions is generated, notably end-of-life tires, which are harmful to the environment when not properly disposed. Their composition contains contaminating chemical elements, resulting in negative impacts on the environment. This research aims to present a process that favors the recycling of rubber waste from end-of-life tires. For the construction of the state of the art and state of the technique, a review of the literature on end-of-life tire rubber, and a search on Google Patents and Espacenet was done using Methodi Ordinatio. For the experimental work, samples were made using concentrations of 20%, 40%, and 60% of end-of-life tire rubber particles, with the addition of thermoset polymeric matrix of isophthalic polyester resin, catalyst, and dyes. In order to evaluate the quality of the mixture, some tests with the material resulting from the mixture were performed: Izod impact strength, Shore D hardness, immersion density determination, flexural strength, and scanning electron microscopy analysis. The results from the tests indicate that the composition with 60% of rubber particles had better mechanical results than samples containing 20% and 40%. The tests also show that end-of-life tire particles promote chemical adsorption (interaction) with the thermoset polymer matrix, favoring the mechanical properties. The final results of this research are: the literature review and the search on granted patents showed that this study is original; the experimental work suggests that practical applications are possible, generating a new product, harder with a proportion of 60% of rubber particles, as indicated by the tests, with a smooth surface that does not require polishing. Thus, this research is characterized as innovative as well as having sustainable characteristics.

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