期刊论文

Cheng, Shengli

Wang, JY (reprint author), Dalian Univ Technol, State Key Lab Fine Chem, Dalian 116024, Peoples R China.

Zong, Lishuai,Yuan, Kuanyu,Han, Jianhua,Jian, Xigao,Wang, Jinyan

2016-01-01

RSC ADVANCES

SCIE、EI

J

6

91

88403-88410

2046-2069

To improve the thermo-oxidative stability of acetylenic aromatic compounds, 1,2-bis(4-trimethylsilylethynylphenyl)-carborane (CBTMS) was designed, synthesized and characterized by FT-IR, H-1-NMR, C-13-NMR and mass spectrometry. The analysis of the DSC results showed that the acetylenic monomer had a melting point at 195.5 degrees C. The cross-linking process of CBTMS included a Diels-Alder cycloaddition reaction confirmed by FT-IR spectroscopy. Nonisothermal DSC studies showed CBTMS has an activation energy similar to that of the phenylethynyl-terminated compound. The thermoset and ceramic derived from the acetylenic monomer exhibited extremely thermo-oxidatively stable properties studied using thermogravimetric analysis (TGA). The thermoset showed a weight gain in air at elevated temperature and char yield of 98.8% at 1000 degrees C in air, and the ceramic residue had almost no weight loss up to 1000 degrees C in air. We demonstrated that trimethylsilylethynyl could be used as a crosslinking group for thermosetting polymers.