热重分析
硅酮
有机硅树脂
热稳定性
固化(化学)
水解
化学
高分子化学
氮气
产量(工程)
催化作用
烧焦
热分解
核化学
材料科学
有机化学
热解
复合材料
涂层
作者
Huadong Zhang,Zhongyi Yan,Zhizhou Yang,Jinshui Yao,Qiuhong Mu,Dan Peng,Hui Zhao
出处
期刊:RSC Advances
[Royal Society of Chemistry]
日期:2021-01-01
卷期号:11 (49): 30971-30979
被引量:11
摘要
A novel silicone resin (SR-OH) containing phenolic hydroxyl (Ph-OH) groups was designed and synthesized via co-hydrolysis/condensation and catalytic hydrogenation. During the curing process, the cross-linking degree of the resin was further increased by the Si-O-Ph bonds formed by the reaction of the Ph-OH and terminal Si-OH groups. Thermogravimetric analysis (TGA) showed that the cured resin product exhibited excellent thermal and thermo-oxidative stability, which was much higher than that of a typical methyl phenyl silicone resin (SR-Ph). The temperature at which 5% weight loss occurs (Td5) was up to 606 °C (nitrogen) and 542 °C (air), and its char yield at 800 °C was 91.1% and 85.3% in nitrogen and air, respectively. The significant improvement in thermal stability was mainly attributed to the formation of Si-O-Ph bonds which not only increases the cross-linking degree of the resin but also significantly prevents degradation by the 'back-biting' and oxidative cleavage.
科研通智能强力驱动
Strongly Powered by AbleSci AI