Preparation and thermal degradation behavior of room temperature vulcanized silicone rubber-g-polyhedral oligomeric silsesquioxanes
Preparation and thermal degradation behavior of room temperature vulcanized silicone rubber-g-polyhedral oligomeric silsesquioxanes
复制标题
室温硫化硅橡胶-g-多面体低聚倍半硅氧烷的制备及其热降解行为
DOI：
10.1016/j.polymer.2013.08.041
复制
发表时间：
2013-10-18
期刊：
影响因子：
4.6
通讯作者：
Huang, Guangsu
中科院分区：
文献类型：
--
作者：
Liu, Yufeng;Shi, Yunhui;Huang, Guangsu
制备了室温硫化（RTV）硅橡胶-g-多面体低聚硅氧烷（PUSS），并通过热重分析（TGA）研究了其热降解行为和热氧化稳定性。结果表明，PUSS在聚二甲基硅氧烷（PDMS）链中的化学掺入显著提高了RTV硅橡胶在氮气和空气气氛中的热稳定性。利用热重分析（TGA）和实时傅立叶变换红外光谱（FTIR）监测了降解行为，并用FTIR和x射线光电子能谱（XPS）对残留物进行了表征。结果表明：RTV硅橡胶-g- poss的支链结构和PUSS分子与PDMS链的相互作用是其热稳定性显著提高的主要原因；(2)形成PUSS圈闭并形成接枝或交联结构；(3)膨胀形成的陶瓷保护屏障；(4) pass在RTV硅橡胶-g- poss中的完美分布。(C) 2013 Elsevier Ltd.版权所有。
Room temperature vulcanized (RTV) silicone rubber-g-polyhedral oligomeric silsesquioxanes (PUSS) was prepared and its thermal degradation behavior and thermo-oxidative stability were investigated by thermogravimetric analysis (TGA). The results demonstrated that the chemical incorporation of PUSS into polydimethylsiloxane (PDMS) chains significantly enhanced thermal stability of RTV silicon rubber in both nitrogen and air atmosphere. The degradation behavior was further monitored by TGA coupled with real time Fourier transform infrared spectra (FTIR), and the residues were characterized by FTIR and X-ray photoelectron spectroscopy (XPS). It was found that the remarkable improvement in thermal stability could be attributed to the following reasons: (1) the branched structure of RTV silicone rubber-g-POSS and interaction between PUSS molecules and PDMS chains; (2) PUSS traps generated and grafted or cross-linked structure formed; (3) intumescent ceramic protective barrier formed; (4) the perfect distribution of PUSS in RTV silicone rubber-g-POSS. (C) 2013 Elsevier Ltd. All rights reserved.