RECYCLING OF EPDM RUBBER WASTE COMPOUND AT DIFFERENT CONDITIONS: STUDY ON THE DE-VULCANIZATION PROCESS AND PROPERTIES OF RECYCLED RUBBER AFTER RE-VULCANIZATION

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MOHAMMADIAN GEZAZ S.; KARRABI M.; PASHAEI F.

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Journal: Journal of Applied Research in Chemistry Year:2018 | Volume:11 | Issue:4 Page(s): 39-50

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Title

RECYCLING OF EPDM RUBBER WASTE COMPOUND AT DIFFERENT CONDITIONS: STUDY ON THE DE-VULCANIZATION PROCESS AND PROPERTIES OF RECYCLED RUBBER AFTER RE-VULCANIZATION

Author(s)

MOHAMMADIAN GEZAZ S. | KARRABI M. | PASHAEI F. | Issue Writer Certificate

Keywords

RUBBER COMPOUNDQ2

DEVULCANIZATIONQ2

THERMO-MECHANICAL METHODQ1

REVULCANIZATIONQ1

Abstract

Waste EPDM was recycled by using a twin-screw extruder in the THERMO-MECHANICAL METHOD; and the effects of processing parameters were investigated. Barrel temperature (220, 280, 340 and 380oC) and screw speed (60, 100 and 140 rpm) were chosen as the variables. Devulcanized characterizations, such as DEVULCANIZATION percent, solvent swelling, and sole fraction were studied. After curing, the properties of revulcanized compounds (including 30 phr devulcanized EPDM) were compared with the reference compound (100% new EPDM compound). At low temperature and low screw speed, DEVULCANIZATION was poor while with increasing both of them, DEVULCANIZATION occurred very significantly indicated as higher solvent swelling. On the other hand, sole fraction increased as a function of processing conditions. Mooney viscosity decreased for high processing parameters; higher sole fraction, lower Mooney viscosity. Normally, compounds having 30 phr devulcanized rubber showed properties poorer than the reference one, but closer to evaluating DEVULCANIZATION conditions. As the temperature or speed increased, stronger tensile behavior, reduced pressure set, and less creep elongation were achieved, meaning more crosslinks breakdown and successful REVULCANIZATION.

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APA: Copy

MOHAMMADIAN GEZAZ, S., KARRABI, M., & PASHAEI, F.. (2018). RECYCLING OF EPDM RUBBER WASTE COMPOUND AT DIFFERENT CONDITIONS: STUDY ON THE DE-VULCANIZATION PROCESS AND PROPERTIES OF RECYCLED RUBBER AFTER RE-VULCANIZATION. JOURNAL OF APPLIED RESEARCHES IN CHEMISTRY (JARC), 11(4 ), 39-50. SID. https://sid.ir/paper/179995/en

Vancouver: Copy

MOHAMMADIAN GEZAZ S., KARRABI M., PASHAEI F.. RECYCLING OF EPDM RUBBER WASTE COMPOUND AT DIFFERENT CONDITIONS: STUDY ON THE DE-VULCANIZATION PROCESS AND PROPERTIES OF RECYCLED RUBBER AFTER RE-VULCANIZATION. JOURNAL OF APPLIED RESEARCHES IN CHEMISTRY (JARC)[Internet]. 2018;11(4 ):39-50. Available from: https://sid.ir/paper/179995/en

IEEE: Copy

S. MOHAMMADIAN GEZAZ, M. KARRABI, and F. PASHAEI, “RECYCLING OF EPDM RUBBER WASTE COMPOUND AT DIFFERENT CONDITIONS: STUDY ON THE DE-VULCANIZATION PROCESS AND PROPERTIES OF RECYCLED RUBBER AFTER RE-VULCANIZATION,” JOURNAL OF APPLIED RESEARCHES IN CHEMISTRY (JARC), vol. 11, no. 4 , pp. 39–50, 2018, [Online]. Available: https://sid.ir/paper/179995/en

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