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《合成橡胶工业》[ISSN:1000-1255/CN:62-1036/TQ]

期数:

2024年2期

页码:

147-152

栏目:

出版日期:

1900-01-01

文章信息/Info

Title:

Effect of inorganic oxides on heat resistance of fluorosilicone rubber

文章编号:

1000-1255（2024）02-0147-06

作者:

冯小亚; 魏凯杰; 胡彦杰?鄢

华东理工大学 材料科学与工程学院，上海 200237

Author(s):

FENG Xiao-ya;  WEI Kai-jie;  HU Yan-jie

School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China

关键词:

氟硅橡胶; 耐热剂; 无机氧化物; 硫化特性; 热稳定性; 拉伸性能

Keywords:

fluorosilicone rubber;  heat-resistant additive;  inorganic oxide;  curing characteristics;  thermal stability;  tensile property

分类号:

TQ 333.93

DOI:

DOI:10.19908/j.cnki.ISSN1000-1255.2024.02.0147

文献标识码:

B

摘要:

以自制纳米颗粒二氧化钛（TiO2）及铁掺杂二氧化钛（TiO2/Fe2O3）作为耐热剂，研究了其对氟硅橡胶热稳定性和耐热空气老化性能的影响规律，分析了氟硅橡胶在空气中热失重5%时的分解产物成分及氟硅橡胶在热老化前后特征基团含量的变化，并对比研究了商用耐热剂纳米氧化铈（CeO2）、三氧化二铁（Fe2O3）和三氧化二铝（Al2O3）对氟硅橡胶性能的影响。结果表明，当纳米耐热剂质量分数为2%时，氟硅橡胶在空气中的5%热失重温度从高到低依次为添加TiO2/Fe2O3、TiO2、Fe2O3、CeO2、Al2O3试样和空白样；添加了纳米TiO2/Fe2O3复合耐热剂的氟硅橡胶的5%热失重温度达到了453 ℃，比空白样提高了47 ℃。纳米TiO2/Fe2O3复合耐热剂能显著抑制氟硅橡胶含氟侧基的氧化，这是氟硅橡胶耐热性能提高的主要原因。

Abstract:

The effects of self-made nano particles titanium dioxide (TiO2) and iron-doped titanium dioxide (TiO2/Fe2O3) as heat-resistant additives on thermal stability and tensile properties of fluorosilicon rubber after hot air aging were studied. The decomposition products of fluorosilicon rubber at 5% weight loss in air and the content of characteristic groups of fluorosilicon rubber before and after thermal aging were analyzed. The effects of commercial heat-resistant additives, such as nano ceria (CeO2), ferric oxide (Fe2O3) and aluminum trioxide (Al2O3) on fluorosilicone rubber were compared. The results showed that when the mass fraction of nano heat- resistant additive was 2%, the 5% weight loss temperature of fluorosilicone rubber in air from high to low was TiO2/Fe2O3, TiO2, Fe2O3, CeO2, Al2O3 samples and blank sample. The 5% weight loss temperature of fluorosilicone rubber with nano-TiO2/Fe2O3 heat-resistant additive reached 453 ℃, which was 47 ℃ higher than that of blank sample. Nano-TiO2/Fe2O3 heat-resistant additive could significantly inhibit oxidation of fluorine-containing side groups of fluorosilicone rubber, which was the main reason for improvement of the heat resistance of fluorosilicone rubber.

参考文献/References

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备注/Memo

备注/Memo:

国家自然科学基金面上项目（21978088）。

常用功能

更新日期/Last Update: 1900-01-01