期刊
POLYMER DEGRADATION AND STABILITY
卷 129, 期 -, 页码 286-295出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymdegradstab.2016.05.006
关键词
Carborane; Imide oligomer; Degradation mechanism
资金
- National Natural Science Foundation of China [51173152]
- Scientific Research Innovation Team of Education Department of Sichuan Provincial [16TD0009]
- Scientific Research Innovation Team of Southwest Petroleum University [2013XJZT005]
Carborane-containing imide compound (Carb-PEPA) was synthesized and added into fluorinated phenylethynyl terminated imide oligomer (AFR-PEPA). The thermal degradation of Carb-PEPA was studied by thermogravimetric analyzer coupled with Fourier transform infrared analysis (TG-FTIR), in situ FTIR and pyrolysis-gas chromatography-mass spectrometry (Py-GC/MS). The results show that the Carb-PEPA possesses high char yield in both air and nitrogen due to the formation of B-O bonds in thermal degradation process as identified by TG-FTIR and in situ FTIR. A thermal degradation mechanism for the Carb-PEPA was proposed. The Carb-PEPA crosslinks to form polyimide in the early heating process. Then the degradation of Carb-PEPA happens at higher temperatures, while further degradation could be effectively prevented due to the formation of a protection layer of boron oxide compound. The thermal stabilities of AFR-PEPA and AFR-PEPA containing 15 wt% Carb-PEPA (AFR-PEPA-Carb-15) were also studied by TGA and TG-FTIR. It was observed that AFR-PEPA's residual weight ratios at 800 degrees C in air and nitrogen increased by 20% and 13.3% respectively with the addition of 15 wt% Carb-PEPA. (C) 2016 Elsevier Ltd. All rights reserved.
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