| 三元乙丙橡胶混炼胶中炭黑引起的焦烧现象及其主要影响因素研究 |
| Scorch Phenomenon of EPDM Compound Caused by Carbon Black and Its Main Influencing Fators |
| 投稿时间：2021-04-27 修订日期：2021-05-16 |
| DOI：10.12136/j.issn.1000-890X.2021.08.0585 |
| 中文关键词: 三元乙丙橡胶 炭黑 焦烧 分散 聚集 网络化 |
| 英文关键词: EPDM carbon black scorch dispersion agglomeration networking |
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| 中文摘要: |
| 三元乙丙橡胶（EPDM）混炼胶由于大量填充炭黑而引起的焦烧（简称炭黑焦烧）影响到混炼胶的存放、挤出和后续的制品成型加工。本工作从热力学和动力学角度探讨了EPDM混炼胶的炭黑焦烧的原因、过程和主要影响因素。试验结果表明，炭黑焦烧主要源于已分散的炭黑粒子在EPDM基体中的再次聚集和网络化。炭黑用量、分散水平以及混炼胶热处理对炭黑焦烧产生影响：炭黑用量达到某一临界值就会引发EPDM混炼胶出现炭黑焦烧现象，高温热处理的EPDM混炼胶更容易发生炭黑焦烧，而提高炭黑分散水平可以在一定程度上抑制炭黑焦烧。 |
| 英文摘要: |
| 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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