| Scorch Phenomenon of EPDM Compound Caused by Carbon Black and Its Main Influencing Fators |
| Received:April 27, 2021 Revised:May 16, 2021 |
| DOI：10.12136/j.issn.1000-890X.2021.08.0585 |
| Key Words: EPDM；carbon black；scorch；dispersion；agglomeration；networking |
| Author Name | Affiliation | E-mail | | CHEN Yougen | Shandong Link Advanced Materials Co.,Ltd. | ygchensd@163.com | | ZHAO Guogang | Shandong Link Advanced Materials Co.,Ltd. | | | JIANG Baohuan | Shandong Link Advanced Materials Co.,Ltd. | | | ZHANG Youwei* | Shandong Link Advanced Materials Co.,Ltd. | zhangyouwei09@163.com |
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| Abstract: |
| The scorch of ethylene-propylene-diene rubber （EPDM） compound caused by a large
loading of carbon black（carbon black scorch for short） affected the storage and extrusion of the compound
and the subsequent molding processing of the product. In this study，the cause，process and key influencing
factors of the carbon black scorch of EPDM compound were investigated from the perspective of
thermodynamics and kinetics. The results showed that，the carbon black scorch was originated from the reagglomerated
and networking of the dispersed carbon black aggregates in the EPDM matrix. The loading
and dispersion level of carbon black and the heat treatment of the compound affected the carbon black
scorch. It was found that，when the loading of carbon black reached a certain critical value，the carbon black
scorch of the EPDM compound would became significant，and the EPDM compounds with high temperature
treatment were more prone to the carbon black scorch，while improving the dispersion level of carbon black
could inhibit the carbon black scorch to some extent. |
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