A novel addition curing ethynyl phenyl azo phenol-biphenylene resin (EPABN) was synthesized by introducing ethynylphenyl group into biphenyl novolac resin (BN) through diazo coupling reaction. Its synthesis reaction and curing mechanism were also proposed. Fourier transform infrared spectroscopy and 1H NMR spectroscopic analysis showed that the ethynylphenyl group was successfully linked to the BN molecular chain. By differential scanning calorimetry analysis, the curing process of EPABN resin was determined to be 150 °C/2 h + 172 °C/2 h + 203 °C/4 h + 255 °C/4 h + 300 °C/4 h. Gel permeation chromatography and elemental analysis showed that the introduction of ethynylphenyl group increased the number-average molecular weight and weight-average molecular weight of EPABN. Thermogravimetric analysis showed that the EPABN resin synthesized under the obtained optimum conditions has excellent heat resistance, ablation resistance, and mechanical properties. Td5 and Td10 of heat resistance of the cured EPABN resin are 463 and 531 °C, respectively, andits residual char yield at 700 and 1000 °C is 78.2% and 72.1%,respectively.
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机译：通过重氮偶合反应将乙炔基苯基引入联苯酚醛清漆树脂（BN）中，合成了一种新型的加成固化乙炔基苯基偶氮苯酚联苯树脂（EPABN）。还提出了其合成反应和固化机理。傅里叶变换红外光谱和 1 1H NMR光谱分析表明，乙炔基苯基与BN分子链成功连接。通过差示扫描量热法分析，确定EPABN树脂的固化过程为150°C / 2 h + 172°C / 2 h + 203°C / 4 h + 255°C / 4 h + 300°C / 4 h 。凝胶渗透色谱法和元素分析表明，乙炔基苯基的引入增加了EPABN的数均分子量和重均分子量。热重分析表明，在所获得的最佳条件下合成的EPABN树脂具有优异的耐热性，耐烧蚀性和机械性能。固化的EPABN树脂的耐热性Td 5 和Td 10 分别为463°C和531°C，在700和1000°C下的残炭产率分别为78.2％和72.1％，分别。
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