Significant factors affecting the thermo-chemical de-vulcanization efficiency of tire rubber

Anuwat Worlee, Sitisaiyidah Saiwari*, Wilma Dierkes, Siti Salina Sarkawi

*Corresponding author for this work

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In this study, the influence of the molecular structure of the rubber, the carbon black loading and de-vulcanization time and temperature on the thermo-chemical de-vulcanization efficiency of whole tire rubber was investigated by correlating sol fraction and crosslink density (Horikx-Verbruggen method). Differences in molecular structure influence the de-vulcanization mechanisms of rubbers as well as the efficiency. Increasing carbon black loadings result in higher crosslink densities due to a deactivation of the de-vulcanization aid. Variation of de-vulcanization temperature and time results in different degrees of heat accumulation in the rubber during de-vulcanization and thus leads to different de-vulcanization efficiencies.

Original languageEnglish
Pages (from-to)1118-1123
Number of pages6
JournalJournal of Environmental Treatment Techniques
Issue number3
Publication statusPublished - 20 Sep 2020


  • Carbon black
  • De-vulcanization
  • Recycling
  • Tire rubber


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