可降解生物基热固性树脂的合成和性能研究

Synthesis and properties of degradable bio-based thermosetting resin

通过酯交换法以蔗糖为原料合成了一种具有高反应活性的多官能度蔗糖型乙酰乙酯(SA),采用红外光谱和核磁共振波谱对SA的结构进行了表征。以聚醚胺D230和异佛尔酮二胺为复合固化剂,并对其固化过程进行红外监测。采用拉伸测试、动态机械热分析(DMA)、热重分析(TGA)等手段对SA-DA树脂的性能进行了表征,通过拉曼光谱对碳纤维的回收效果进行了分析。结果表明:SA-DA树脂具有良好的拉伸性能,玻璃化转变温度最高可达226.5℃,并具有可调节的降解性能。SA-DA树脂的综合性能优异,在热固性树脂涂料及碳纤维复合材料领域具有较大应用价值,为碳纤维回收利用提供了新的思路。

A multifunctional sucrose-type acetoethyl ester(SA) with high reactivity was synthesized from sucrose by transesterification method. The structure of SA was characterized by infrared spectroscopy and nuclear magnetic resonance spectroscopy. The polyetheramine D230 and isophorone diamine were used as compound curing agents, and the curing process was monitored by FTIR. The properties of SA-DA resin were characterized by tensile test, dynamic mechanical thermal analysis(DMA), thermogravimetric analysis(TGA) and other methods, and the recovery effect of carbon fiber was analyzed by Raman spectroscopy. The results showed that the SA-DA film had good tensile properties and adjustable degradation properties. Its T;was 226.5 ℃. The performance of SA-DA resin was excellent, and it had great application value in the field of thermosetting coatings and carbon fiber composite materials, and it provided a new idea for the recycling and reuse of carbon fiber.