摘要
采用热重分析法和热重-质谱联用技术考察了氨酚醛树脂和硼改性酚醛树脂的热降解过程,利用红外光谱和固体核磁共振技术研究了热降解过程中两种树脂结构的变化规律,以期为合成成炭率高、热稳定性好的硼改性酚醛树脂提供依据。结果表明,在酚醛树脂中引入硼酸后改变了其分子结构,生成了键能较高的硼酯键,提高了酚醛树脂的成炭率和热稳定性,700℃硼酸改性酚醛树脂的成炭率为76.2%,高于未改性氨酚醛树脂的成炭率66.9%。
The ammonia catalyzed resin （PF1.2） and resin modified by boric acid （BPF） were studied by thermo- gravimetric analysis and thermo gravimetric-mass spectrometry （TG-MS） analysis. Their structural changes during thermal degradation were investigated by means of Fourier-transform infrared （FT-IR） and solid-state 13C nuclear magnetic resonance （13C-NMR）. The results show that the molecular structure of resin alters and the B-O bond with high bond energy is formed after modification by boric acid, thus the char yield of phenolic resin is improved. A higher char yield of 76.2% which is higher than that of ammonia catalyzed resin （66.9%） is attached at 700 ℃ in nitrogen atmosphere.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2013年第5期96-99,共4页
Polymer Materials Science & Engineering
关键词
酚醛树脂
硼酚醛树脂
改性
热降解
：phenolic resin
resin modified by boric acid
modification
thermal degradation
