海泡石对补强三元乙丙橡胶热氧稳定性的影响

doi:10.11901/1005.3093.2016.645

材料研究学报

2017, Vol. 31

Issue (11): 867-873 DOI: 10.11901/1005.3093.2016.645

研究论文

本期目录 | 过刊浏览

海泡石对补强三元乙丙橡胶热氧稳定性的影响

赵志刚¹, 汤庆国^1,²(

), 曾召刚³, 杨爽¹, 孙剑锋^1,², 梁金生^1,²

1 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天津 300130。
2 河北工业大学能源与环境材料研究所天津 300130。
3 湘潭海泡石科技有限公司湘潭 411100。

Effect of Sepiolite on Thermo-oxidative Stability Performance of Reinforced EPDM

Zhigang ZHAO¹, Qingguo TANG^1,²(

), Zhaogang ZENG³, Shuang YANG¹, Jianfeng SUN^1,², Jinsheng LIANG^1,²

1 Key Laboratory of Special Functional Materials for Ecological Environment and Information Ministry of Education, Hebei University of Technology, Tianjin 300130, China.
2 Institute of Power Source and Ecomaterials Science, Hebei University of Technology, Tianjin 300130, China.
3 Xiangtan Sepiolite Technology Company Limited, Xiangtan 411100, China.

引用本文:

赵志刚, 汤庆国, 曾召刚, 杨爽, 孙剑锋, 梁金生. 海泡石对补强三元乙丙橡胶热氧稳定性的影响[J]. 材料研究学报, 2017, 31(11): 867-873.
Zhigang ZHAO, Qingguo TANG, Zhaogang ZENG, Shuang YANG, Jianfeng SUN, Jinsheng LIANG. Effect of Sepiolite on Thermo-oxidative Stability Performance of Reinforced EPDM[J]. Chinese Journal of Materials Research, 2017, 31(11): 867-873.

全文: PDF(832 KB) HTML

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(3⁴)),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(TG-DTA)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t₇₀与反应速率常数K₇₀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t₇₀能很好地评价OSP/EPDM的热氧稳定性。

关键词 ：复合材料, 海泡石, 三元乙丙橡胶, 热氧稳定性, 氧化诱导期, 老化试验

Abstract：

Effect of the addition of modified sepiolite on the thermal oxidative stability of the surface modified sepiolite reinforced ethylene propylene diene monomer rubber (OSP/EPDM) was investigated via the orthogonal experiment L₉(3⁴). The peak temperature variation for the oxidation process of OSP/EPDM is determined by thermogravimetric and differential thermal analysis (TG-DTA). The apparent activation energy (ΔE) and reaction rate constant (K_T) were acquired via oxidation reaction test of the vulcanized rubber and oxidation reaction kinetics calculation, while the oxidation induction time (OIT) was calculated according to Doyle formula, which was compared with the experimental resultsof rubber aging test. The results show that the oxidation induction time (t₇₀) are in good agreement with the reaction rate constant K₇₀, and the calculated results are consistent to the experimental ones, indicating that the t₇₀ could be applied to evaluate thermal oxidative stability of OSP/EPDM.

Key words： composite sepiolite ethylene propylene diene monomer thermo-oxidative stability performance oxidation induction time aging experiment

收稿日期: 2016-11-03

基金资助:资助项目河北省自然科学基金(E2013202142)和天津市自然科学基金重点项目(10JCZDJC223300)

作者简介:

赵志刚,男,1988年生,硕士生

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https://www.cjmr.org/CN/10.11901/1005.3093.2016.645 或 https://www.cjmr.org/CN/Y2017/V31/I11/867

表1 OSP/EPDM复合橡胶正交实验表

图1 试样2在空气和氮气气氛下的TG-DTA曲线

图2 表1中试样5在空气气氛中不同加热速率时的DTA曲线

表2 不同加热速率条件下试样氧化峰的峰值温度Tp

表3 实验条件对各系数的影响

表4 OSP/EPDM复合橡胶老化前后力学性能的对比

表5 OSP/EPDM的AC和t70的极差分析

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