文献类型：期刊文献

英文题名：Boron particles acting as antioxidants for fluorosilicone rubber due to their radical scavenging activity

作者：Zheng, Anna[1];Huang, Yongkang[1];You, Yang[1];Hu, Jian[1];Wei, Dafu[1];Xu, Xiang[1,2];Guan, Yong[1,2]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Specially Funct Polymer Mat & Related Tec, Shanghai 200237, Peoples R China

年份：2018

卷号：158

起止页码：168

外文期刊名：POLYMER DEGRADATION AND STABILITY

收录：;EI(收录号：20184606083554);WOS:【SCI-EXPANDED(收录号:WOS:000452930600018)】；

基金：The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (51573043) and the Fundamental Research Funds for the Central Universities (No. 222201817001 and 222201814004). This research was supported by the Shanghai Leading Academic Discipline Project (B502) and the Shanghai Key Laboratory Project (Grant No. ZD20170203). Support from FSIR Advanced Material Co., Ltd. is also gratefully acknowledged.

语种：英文

外文关键词：Fluorosilicone rubber; Boron particles; Antioxidant; Radical scavenging ability

摘要：The heat resistance enhancement of fluorosilicone rubber (FSR) can make it more suitable for cutting- edge applications and extreme conditions. This paper focused on the antioxidant properties of boron particles for FSR and the corresponding mechanism. The thermal stability of FSR and FSR/boron composites was characterized by thermal gravimetric analysis (TGA), isothermal degradation and thermal oxidative ageing. The results showed that boron significantly improved the thermal stability of FSR. In particular, the FSR/boron (100/10) composite retained 95% of its weight after isothermal degradation at 350 degrees C for 12 h, while the FSR lost 55% of its weight within the initial 1 h. The antioxidant mechanism of boron was further investigated by chemiluminescence (CL), electron paramagnetic resonance (EPR) and vulcanization curves. It was shown that boron has powerful radical scavenging activity (RSA) and inhibited the oxidation scission of the side groups. Moreover, boron revealed no RSA towards the tert-butoxy radical, ensuring the good vulcanization of the FSR/boron composites. (C) 2018 Elsevier Ltd. All rights reserved.