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测试与分析 姚皖生 等·MH 含量对 EPDM 过氧化物硫化反应的影响

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Effect of MH content on the sulfurization reaction of EPDM peroxide

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Yao Wansheng , Dong Yong , Wang Zhaofei , Zhang Baiyao , Wang Ping , Wang Chenxi , Zhou Yiyang ,
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Ding Yunsheng 1,3*
(1.College of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, Anhui, China;
2. School of Materials and Chemical engineering, Anhui Jianzhu University, Hefei 230601, Anhui, China;
3. Anhui Provincial Key Laboratory of Advanced Functional Materials and Devices, Hefei 230009, Anhui, China)
Abstract: Blending composite modification and vulcanization of rubber are important ways to improve
rubber properties and expand rubber application fields. In this paper, flame retardant EPDM composites were
prepared by melt blending, and the effect of Magnesium hydroxide (M H ) content in flame retardant EPDM
composites on peroxide vulcanization of EPDM rubber (EPDM) was studied. The results showed that the addition
of MH reduced the scorching time t10 of EPDM; At 160 ℃ , the vulcanization rate gradually decreases with the
increase of M H ; At 170 ℃ and 180 ℃ , with the increase of MH, the vulcanization rate of EPDM first decreases
and then increases. The mechanical properties test results of EPDM composites at different vulcanization
temperatures show that the tensile strength of flame-retardant EPDM composites after vulcanization does not
decrease with the increase of vulcanization temperature. MH has a promoting effect on the formation and
stability of cross-linked structure during the vulcanization process of EPDM in the composites.
Key words: EPDM rubber; magnesium hydroxide; vulcanization reaction; dynamics
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2023 第 49 卷 ·63·
年