摘要
通过水煮实验、DMA和红外光谱分析研究了TDE85/DDS浇注体的吸湿特性,吸湿前后的动态力学性能和吸湿前后的分子结构,并采用红外光谱和气质联用仪分析了TDE85树脂水煮前后的分子结构。结果表明,在湿热环境下,TDE85/DDS树脂浇铸体分子结构中的酯基会水解生成羧基和羟基;未加固化剂的TDE85树脂水煮后也会发生水解反应;TDE85/DDS树脂浇铸体的平衡吸湿率为21%;由于树脂浇铸体水解反应的发生,其分子三维交联结构破坏,进而造成了树脂浇铸体的热性能和力学性能下降。
The hygroscopic properties, dynamic mechanical properties and molecular structure before and after moisture absorption of TDE85/DDS castings were investigated by water boiling experiments, DMA analysis and in- frared spectra . The molecular structure of TDE85 resin before and after water boiling was analyzed by infrared spectroscopy and GC -MS analysis. The results showed that the ester group of the TDE85/DDS casting molecule structure would be hydrolyzed to carboxyl ester group and hydroxyl group in the hot and humid environment. The hy- drolysis of TDE85 resin without adding curing agent would also oeeured . The equilibrium moisture absorption rate of TDE85/DDS casting was 21%. The cross -linked three -dimensional structure of molecular was damaged by the hydrolysis of castings and resulting in the decreasing of thermal properties and mechanical properties of cast- ings.
出处
《热固性树脂》
CAS
CSCD
北大核心
2013年第6期6-10,共5页
Thermosetting Resin
