scholarly journals Joint Reuse of Post-consumer Polyolefines and Ground Tire Rubber for Thermoplastic Elastomers Production. Mechanical Performance, Thermal and Radiation Stability

2012 ◽  
Vol 6 (1) ◽  
pp. 59-72 ◽  
Author(s):  
Olga Grigoryeva ◽  
◽  
Olga Starostenko ◽  
Alexander Fainleib ◽  
Gonzalo Martínez-Barrera ◽  
...  
Keyword(s):  
Mechanical Performance ◽  
Radiation Stability ◽  
Thermoplastic Elastomers ◽  
Tire Rubber ◽  
Ground Tire Rubber

scholarly journals Structural Changes and Their Implications in Foamed Flexible Polyurethane Composites Filled with Rapeseed Oil-Treated Ground Tire Rubber

2021 ◽  
Vol 5 (3) ◽  
pp. 90
Author(s):  
Paulina Kosmela ◽  
Adam Olszewski ◽  
Łukasz Zedler ◽  
Paulina Burger ◽  
Krzysztof Formela ◽  
...  
Keyword(s):  
Rapeseed Oil ◽  
Structural Changes ◽  
Mechanical Performance ◽  
Reactive Extrusion ◽  
Solid Particles ◽  
Tire Rubber ◽  
Average Cell ◽  
Economic Point ◽  
Ground Tire Rubber ◽  
Flexible Polyurethane

The utilization of post-consumer car tires is an essential issue from an ecological and economic point of view. One of the simplest and the least harmful methods is their material recycling resulting in ground tire rubber (GTR), which can be further applied as fillers for polymer-based composites. Nevertheless, insufficient interfacial interactions implicate the necessity of GTR modification before introduction into polymer matrices. In this study, we investigated the influence of rapeseed oil-assisted thermo-mechanical treatment of GTR using a reactive extrusion process on the processing, structure, and performance of flexible polyurethane/GTR composite foams. Applied modifications affected the processing of polyurethane systems. They caused a noticeable reduction in the average cell size of foams, which was attributed to the potential nucleating activity of solid particles and changes in surface tension caused by the presence of oil. Such an effect was especially pronounced for the waste rapeseed oil, which resulted in the highest content of closed cells. Structural changes caused by GTR modification implicated the enhancement of foams’ strength. Mechanical performance was significantly affected by the applied modifications due to the changes in glass transition temperature. Moreover, the incorporation of waste GTR particles into the polyurethane matrix noticeably improved its thermal stability.

Reusing ground tire rubber powder as thermoplastic elastomers with excellent superhydrophobicity and self-cleaning performance

2021 ◽  
pp. 147776062110194
Author(s):  
Xingshuo Zhang ◽  
Ruotao Feng ◽  
Zhaobo Wang
Keyword(s):  
Mechanical Properties ◽  
Superhydrophobic Surface ◽  
Adhesion Force ◽  
Weight Ratio ◽  
Thermoplastic Elastomers ◽  
Molding Process ◽  
Tire Rubber ◽  
Ground Tire Rubber ◽  
Optical Images ◽  
Self Cleaning

A simple, effective and inexpensive method was proposed to reuse ground tire rubber (GTR) powder by preparing a superhydrophobic surface via a molding process. The obtained superhydrophobic surface was based on low-density polyethylene (LDPE) / ground tire rubber (GTR) thermoplastic elastomers (TPEs) where the styrene-butadiene-styrene block copolymer (SBS) was used as compatibilizer and series sandpapers were used as templates. The mechanical properties, hydrophobic properties, surface morphology and self-cleaning property were investigated systematically. The results showed that both of the mechanical properties and superhydrophobicity could be greatly improved with a certain amount of SBS. The superhydrophobic surface based on molded LDPE/SBS/GTR (weight ratio = 40/15/60) TPE exhibited excellent superhydrophobicity (with a contact angle of 164.6° ± 3.0° and a tilt angle of 4.4° ± 1.9°). Furthermore, abundant tearing microstructure could be found obviously by morphology observation. Optical images indicated the surface possessed of low adhesion force and self-cleaning property.

Thermoplastic elastomers based on high-density polyethylene, ethylene-propylene-diene terpolymer, and ground tire rubber dynamically vulcanized with dicumyl peroxide

2013 ◽  
Vol 131 (4) ◽  
pp. n/a-n/a ◽  
Author(s):  
Rosa Idalia Narro Céspedes ◽  
José Francisco Hernández Gámez ◽  
María Guadalupe Neira Velázquez ◽  
Felipe Ávalos Belmontes ◽  
Ramón Enrique Díaz de León ◽  
...  
Keyword(s):  
High Density Polyethylene ◽  
Thermoplastic Elastomers ◽  
High Density ◽  
Dicumyl Peroxide ◽  
Tire Rubber ◽  
Ground Tire Rubber ◽  
Ethylene Propylene ◽  
Ethylene Propylene Diene Terpolymer

scholarly journals The Impact of Ground Tire Rubber Oxidation with H2O2 and KMnO4 on the Structure and Performance of Flexible Polyurethane/Ground Tire Rubber Composite Foams

Materials ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 499
Author(s):  
Aleksander Hejna ◽  
Adam Olszewski ◽  
Łukasz Zedler ◽  
Paulina Kosmela ◽  
Krzysztof Formela
Keyword(s):  
Mechanical Performance ◽  
Hydroxyl Groups ◽  
Tire Rubber ◽  
Economic Implications ◽  
Ground Tire Rubber ◽  
Polyurethane Composite ◽  
Composite Foams ◽  
And Performance ◽  
Flexible Polyurethane ◽  
The Impact

The use of waste tires is a very critical issue, considering their environmental and economic implications. One of the simplest and the least harmful methods is conversion of tires into ground tire rubber (GTR), which can be introduced into different polymer matrices as a filler. However, these applications often require proper modifications to provide compatibility with the polymer matrix. In this study, we examined the impact of GTR oxidation with hydrogen peroxide and potassium permanganate on the processing and properties of flexible polyurethane/GTR composite foams. Applied treatments caused oxidation and introduction of hydroxyl groups onto the surface of rubber particles, expressed by the broad range of their hydroxyl numbers. It resulted in noticeable differences in the processing of the polyurethane system and affected the structure of flexible composite foams. Treatment with H2O2 resulted in a 31% rise of apparent density, while the catalytic activity of potassium ions enhanced foaming of system decreased density by 25% and increased the open cell content. Better mechanical performance was noted for H2O2 modifications (even by 100% higher normalized compressive strength), because of the voids in cell walls and incompletely developed structure during polymerization, accelerated by KMnO4 treatment. This paper shows that modification of ground tire rubber is a very promising approach, and when properly performed may be applied to engineer the structure and performance of polyurethane composite foams.

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