Mechanochemical Milling of PP/Ground Tire Rubber Blends in Solid-State

2012 ◽  
Vol 27 (4) ◽  
pp. 427-433 ◽  
Author(s):  
X. Zhang ◽  
Z. Zhou ◽  
X. He ◽  
J. Li ◽  
C. Lu
Keyword(s):  
Solid State ◽  
Tire Rubber ◽  
Ground Tire Rubber ◽  
Rubber Blends ◽  
Mechanochemical Milling

scholarly journals Poly (Lactic Acid)/Ground Tire Rubber Blends Using Peroxide Vulcanization

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1496
Author(s):  
Nicolas Candau ◽  
Oguzhan Oguz ◽  
Noel León Albiter ◽  
Gero Förster ◽  
Maria Lluïsa Maspoch
Keyword(s):  
Lactic Acid ◽  
Impact Strength ◽  
Crosslinking Agent ◽  
Mechanical Damage ◽  
Tensile Modulus ◽  
Poly Lactic Acid ◽  
Tire Rubber ◽  
Ground Tire Rubber ◽  
Clay Particles ◽  
Rubber Blends

Poly (Lactic Acid) (PLA)/Ground Tire Rubber (GTR) blends using Dicumyl peroxide (DCP) as a crosslinking agent were prepared with the following aims: propose a new route to recycle wastes rubber from the automotive industry and improve the toughness and impact strength of the inherently brittle bio-based PLA. The GTR were subjected to two types of grinding process (cryo- and dry ambient grinding). Swelling measurements revealed the grinding to be associated with a mechanical damage of the rubber chains, independently on the type of grinding or on the GTR size (from <400 µm to <63 µm). Moreover, the finest GTR contains the largest amount of reinforcing elements (carbon black, clay) that can be advantageously used in PLA/GTR blends. Indeed, the use of the finest cryo-grinded GTR in the presence of DCP showed the least decrease of the tensile strength (−30%); maintenance of the tensile modulus and the largest improvement of the strain at break (+80%), energy at break (+60%) and impact strength (+90%) as compared to the neat PLA. The results were attributed to the good dispersion of both fine GTR and clay particles into the PLA matrix. Moreover, a possible re-crosslinking of the GTR particles and/or co-crosslinking at PLA/GTR interface in presence of DCP is expected to contribute to such improved ductility and impact strength.

Styrene-Butadiene Rubber/Modified Ground Tire Rubber Blends Co-Vulcanization: Effect of Accelerator Type

2016 ◽  
Vol 361 (1) ◽  
pp. 64-72 ◽  
Author(s):  
Krzysztof Formela ◽  
Magdalena Formela ◽  
Sabu Thomas ◽  
Józef Haponiuk
Keyword(s):  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Tire Rubber ◽  
Ground Tire Rubber ◽  
Rubber Blends ◽  
Styrene Butadiene

Ultrasonically Treated Polypropylene/Ground Tire Rubber Blends

2002 ◽  
Vol 75 (4) ◽  
pp. 617-625 ◽  
Author(s):  
Jeong Seok Oh ◽  
A. I. Isayev
Keyword(s):  
Mechanical Properties ◽  
Treatment Process ◽  
Low Cost ◽  
Screw Extruder ◽  
Tire Rubber ◽  
Ground Tire Rubber ◽  
Rubber Blends ◽  
Twin Screw ◽  
Internal Mixer ◽  
Slit Die

Abstract Compounding ground tire rubber (GRT) with commercial polyolefins such as polypropylene (PP) is a possible way of recycling GRT. These new blends can provide low cost materials. The present study describes new materials which are obtained by the ultrasonically treated PP/GRT blends. In order to improve the efficiency of the treatment process, a new ultrasonic reactor was built. In this reactor, two horns were placed in a slit die which is attached to a plastic extruder. PP/GRT blends mixed by using a twin screw extruder were passed through the reactor to devulcanize GRT. Then the blends were dynamically revulcanized using an internal mixer. Mechanical properties, rheology and morphology of the obtained blends were studied. Under optimal conditions of ultrasonic treatment, the mechanical properties of the blends were improved in comparison with our earlier experiments.

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