Preparation and thermal degradation behavior of room temperature vulcanized silicone rubber-g-polyhedral oligomeric silsesquioxanes

被引：84
作者：
Liu, Yufeng [1 ]
Shi, Yunhui [1 ]
Zhang, Dian [1 ]
Li, Jiali [1 ]
Huang, Guangsu [1 ]
机构：
[1] Sichuan Univ, State Key Lab Polymer Mat Engn, Coll Polymer Sci & Engn, Chengdu 610065, Peoples R China
来源：
POLYMER | 2013年 / 54卷 / 22期
基金：
中国国家自然科学基金;
关键词：
Polyhedral oligomeric silsesquioxanes; RTV silicone rubber; Thermal degradation; CROSS-LINKING; MECHANICAL-PROPERTIES; OXYCARBIDE GLASSES; POSS DERIVATIVES; FLAME-RETARDANT; EPOXY-RESIN; POLYSILOXANES; NANOCOMPOSITES; COMPOSITES; MORPHOLOGY;
D O I：
10.1016/j.polymer.2013.08.041
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
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.
引用
收藏
页码：6140 / 6149
页数：10
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