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

doi:10.11901/1005.3093.2016.645

Chinese Journal of Materials Research

2017, Vol. 31

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

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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.

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Zhigang ZHAO, Qingguo TANG, Zhaogang ZENG, Shuang YANG, Jianfeng SUN, Jinsheng LIANG. Effect of Sepiolite on Thermo-oxidative Stability Performance of Reinforced EPDM. Chinese Journal of Materials Research, 2017, 31(11): 867-873.

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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

Received: 03 November 2016

Fund: Supported by Natural Science Foundation of Hebei Province (No. E2013202142) and Natural Science Foundation of Tianjin City (No. 10JCZDJC223300)

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	Zhigang ZHAO
	Qingguo TANG
	Zhaogang ZENG
	Shuang YANG
	Jianfeng SUN
	Jinsheng LIANG

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https://www.cjmr.org/EN/10.11901/1005.3093.2016.645 OR https://www.cjmr.org/EN/Y2017/V31/I11/867

Table 1 Orthogonal experiment of OSP/EPDM composite rubber

Fig.1 The TG-DTA curve of sample 2 under air and nitrogen atmosphere

Fig.2 DTA curve of samples 5 in table 1 under air atmosphere with different heating rate

Table 2 Oxidation peak temperature of the samples under different heating rate

Table 3 Influence of experimental conditions on various coefficients

Table 4 Comparison with the mechanical properties of OSP/EPDM composite rubber before and after aging

Table 5 Range analysis of AC and t₇₀ for OSP/EPDM

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