海泡石对补强三元乙丙橡胶热氧稳定性的影响

发布时间：2018-04-02 14:23

本文选题：复合材料　切入点：海泡石　出处：《材料研究学报》2017年11期

【摘要】：以表面改性后的海泡石(OSP)作为三元乙丙橡胶(EPDM)的补强填料进行4因素3水平正交试验(L9(3~4)),研究了各因素对改性海泡石补强EPDM复合橡胶(OSP/EPDM)热氧稳定性能的影响。用热重-差热分析(TGDTA)测定了OSP/EPDM氧化峰的峰值温度的变化,根据OSP/EPDM硫化胶的氧化反应和氧化反应动力学计算求得氧化反应表观活化能ΔE和反应速率常数K_T,用Doyle氧化诱导期公式计算了氧化诱导期(OIT),并与橡胶在老化箱中的热老化实验结果比较。结果表明:求得的氧化诱导期t_(70)与反应速率常数K_(70)的结果十分吻合,与橡胶老化箱老化试验实测的老化系数变化的趋势相一致,证明根据t_(70)能很好地评价OSP/EPDM的热氧稳定性。
[Abstract]:The surface modified sepiolite (OSP) was used as the reinforcing filler for EPDM). The effects of various factors on the thermal stability of the modified sepiolite reinforced EPDM composite rubber (OSPP / EPDM) were studied by 4 factors and 3 levels orthogonal test.The peak temperature of OSP/EPDM oxidation peak was measured by thermogravimetric differential thermal analysis (TG-DTA).According to the calculation of oxidation reaction and oxidation reaction kinetics of OSP/EPDM vulcanizate, the apparent activation energy 螖 E of oxidation reaction and reaction rate constant K _ T were calculated. The oxidation induction period of OSP/EPDM vulcanizate was calculated by the formula of Doyle oxidation induction period, and the heat of oxidation induction period with rubber in aging box was calculated.The results of aging test were compared.The results show that the results of the oxidation induction period t _ S _ (70) are in good agreement with the results of the reaction rate constant K _ S _ (70), and are consistent with the trend of the change of aging coefficient measured in the aging test of rubber aging box. It is proved that the thermal oxygen stability of OSP/EPDM can be well evaluated according to the results of t _ (t) _ (70).
【作者单位】：河北工业大学生态环境与信息特种功能材料教育部重点实验室;河北工业大学能源与环境材料研究所;湘潭海泡石科技有限公司;
【基金】：河北省自然科学基金(E2013202142) 天津市自然科学基金重点项目(10JCZDJC223300)~~
【分类号】：TB332

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