| Effect of Halogen-free Nitrogen Phosphorus Flame Retardants on Properties of EPDM Compounds |
| Received:September 28, 2021 Revised:October 11, 2021 |
| DOI：10.12136/j.issn.1000-890X.2023.03.0182 |
| Key Words: EPDM；halogen-free nitrogen phosphorus flame retardant；flame retardant property；limiting oxygen index；THR；TSR |
| Author Name | Affiliation | E-mail | | fangxiaodong* | Qingdao university of science and technology | 836505493@qq.com | | WU Mingsheng | Qingdao University of Science and Technology | |
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| Abstract: |
| In this study，flame-retardant ethylene-propylene-diene-propylene rubber （EPDM）
compounds were prepared by adding five halogen-free nitrogen phosphorus flame retardants，FR-680，206，
AT-903C，FR35RP and FR21RP（110 phr），respectively，and the effects of those five halogen-free nitrogen
phosphorus flame retardants on the properties of EPDM compounds were investigated. The results showed
that，all five halogen-free nitrogen phosphorus flame retardants could significantly improve the flame
retardant properties of the EPDM vulcanizates，and the limiting oxygen index of the EPDM vulcanizates was
above 30%. Moreover，the EPDM vulcanizates filled with flame retardant FR35RP and FR-680 had excellent
physical properties，but their flame retardant properties were relatively poor. It was found that the overall
properties of the EPDM vulcanizates filled with flame retardant FR21RP were the best，with a tensile strength
of 7. 0 MPa，a limiting oxygen index of 39%，a maximum total heat release（THR） rate of 83. 43 MJ·m-2，
and a minimum total smoke release（TSR） rate of 462. 42 m2·m-2. |
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