大连理工大学主页平台管理系统蹇锡高 Synthesis and thermal properties of an acetylenic monomer containing boron and silicon 中文主页

论文成果

Synthesis and thermal properties of an acetylenic monomer containing boron and silicon: 点击次数：; 发布时间： 2019-03-13; 发布时间：2019-03-13; 论文类型：期刊论文; 发表时间：2016-01-01; 发表刊物：RSC ADVANCES; 收录刊物：EI、SCIE; 卷号：6; 期号：91; 页面范围：88403-88410; ISSN号：2046-2069; 摘要：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.

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教授博士生导师硕士生导师

性别：男

毕业院校：大连工学院

学位：硕士

所在单位：化工学院

学科：高分子材料. 高分子化学与物理. 膜科学与技术

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