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Devulcanization experiments

In this series of experiments, whole tire reclaim rubber was ground to a particle size of 40 mesh (about 420 pm) and the surface of the ground crumb rubber was then devulcanized. The surface devulcanization was carried out in 2-butanol under the conditions of time, pressure, and temperature specified in Table 3. Then, the samples of surface devulcanized reclaimed rubber made were analyzed by a thermogravimetric... [Pg.2697]

The samples of surface devulcanized reclaimed rubber made in this series of experiments were then compounded with a blend of virgin rubbers and cured. The blends were made by mixing 20 parts per 100 parts of rubber (phr) of the surface devulcanized reclaimed rubber samples with 70phr of Plioflex 1712 SBR, 30 phr of Budene 1254 polybutadiene rubber, about 9 phr of aromatic oil, about 70 phr of carbon black, about 2 phr of stearic acid, about 4 phr of wax, about 1 phr of accelerator, about 2 phr of zinc oxide, about 1.5 phr of sulfur, and about Iphr of antioxidant. The Plioflex 1712 has a bound styrene content of about 28.5% and was oil extended with about 37.5% of an... [Pg.2697]

Also, attempts were made to add a certain amount of a fresh carbon black into the devulcanized rubber. It was shown that the vulcanizates containing a fresh carbon black exhibited better properties than the revulcanized rubber without an addition of fresh carbon black. However, in some cases, even carbon-filled devulcanized rubber shows mechanical properties similar to or better than the original rubber. In particular, this was shown for EPDM roofing membrane containing carbon black and significant amount of oil (Yun and Isayev, 2003b). Apparently, oil plays an important role in devulcanization process. Possibly, the presence of oil prevents a deactivation of the filler that was observed in vulcanizates not containing oil. But in order to prove this hypothesis further experiments are required. [Pg.719]


See other pages where Devulcanization experiments is mentioned: [Pg.703]    [Pg.667]    [Pg.703]    [Pg.667]    [Pg.2622]    [Pg.2700]    [Pg.715]    [Pg.719]    [Pg.721]    [Pg.677]    [Pg.679]    [Pg.681]    [Pg.715]   
See also in sourсe #XX -- [ Pg.667 ]




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Devulcanization

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