Relationship between screw configuration and physio-mechanical and structural properties of devulcanized waste tires

Articles in Press

Document Type : Original Article

Authors

1 Department of Chemical engineering,, Payame Noor University, Tehran, Iran.

2 Department of Chemical Engineering, Payame Noor University, Tehran, Iran

3 Department of Chemical, petroleum and Gas Engineering, Iran University of Science and Technology, Tehran, Iran

10.22034/ijche.2023.381205.1271

Abstract

One of the most concernative challenges of the current century is the disposal of waste tires; recycling them by devulcanization can be a solution to environmental problems. to find the relationship between the screw configuration and the properties of the samples, some new elements with different angles and shears were designed, and installed on the extruder. Then, 15 rubber samples were devulcanized by the extruder and Physical-mechanical tests were performed on them. To determine what process conditions will cause favorable mechanical properties in samples. During the tests, it was determined that temperature will be the most influential parameter in the devulcanization process. it was found that the highest percentage of devulcanization occurs at lower temperatures and medium and high shear rates. In this condition, the weight fraction of sol will be at its maximum value, which increases the processability of the samples. While increasing the temperature and decreasing the cutting rate cause a negative effect on the process. Among the investigated properties; The changes in abrasion and resilience were independent of screw configuration.

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Iranian Chemical Engineering Journal

Articles in Press, Accepted Manuscript
Available Online from 12 May 2023

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