Technical Paper Archive

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Circular Loops for Tire Rubber: Chances and Challenges

E09 dierkes circular loops for tire rubberx3a chances and challenges

Event: 196th Technical Meeting - Fall 2019
Location: Cleveland, OH
Date: October 08, 2019
Author: Wilma Dierkes
Paper Number: E09

Price: $20.00

  • Tires are very sophisticated high-quality products and constantly improved in terms of efficiency, safety and environmental impact. Many of the improvements are material-based. Examples of these developments are the replacement of aromatic oils by Treated Distillate Aromatic Extract (TDAE) to eliminate polycyclic aromatic compounds, the introduction silica-silane reinforcing systems for a higher fuel efficiency, and currently the introduction of resins for improvement of the wet grip and rolling resistance balance. Unfortunately, so far tires are not designed for recycling and material reuse. Rubber is a very durable material, and this hampers the re-processing and re-use of rubber. Nonetheless, there is a variety of recycled rubber products on the market: granulate, powder, reclaim and devulcanizate. The latter is expected to give the best properties as such and in a blend with virgin rubber, as devulcanization is the reversion of the vulcanization process: it aims at breaking the sulfur bonds and keeping the polymer chains intact. However, the fact that tires are built from different types of compounds containing different polymers and fillers limits the quality of the recycled material, as our study showed. Besides, the influence of a silica-silane reinforcing system impedes the controlled scission of the sulfur network. This results in an insufficient degree of devulcanization and, as a consequence, difficult processing and a low level of properties. Ways to overcome these drawbacks in devulcanization efficiency will also be discussed.

    Papers from 196th Technical Meeting - Fall 2019

    Items from 196th Technical Meeting - Fall 2019