论文部分内容阅读
以自制的油脂/松香基二元酸为原料,通过与3种多元胺进行酰胺化反应合成了3种聚酰胺固化剂,再分别与环氧树脂按等当量配比固化。固化物以红外光谱法进行了表征,同时测定了浇注体的力学性能、热失重(TG)及玻璃化温度(Tg),对固化产物的力学性能和热稳定性进行了评价,通过扫描电镜(SEM)对拉伸断裂面的表面形貌进行了观察分析。结果表明,与聚酰胺200#比较,在二元酸中引入松香的环状结构能提高聚酰胺中柔性体系的刚性和耐热性,以自制的油脂/松香基二元酸和三乙烯四胺为原料合成的聚酰胺固化剂具有粘度低、力学性能优和耐热性好等优点。
Three kinds of polyamide curing agents were prepared by amidation reaction with three kinds of polyamines, using self-made grease / rosin-based dibasic acids as raw materials, and then cured with epoxy resin in equivalent ratio respectively. The cured material was characterized by infrared spectroscopy. The mechanical properties, TG and glass transition temperature (Tg) of the castings were measured. The mechanical properties and thermal stability of the cured products were evaluated. The cured products were characterized by scanning electron microscopy SEM) The surface morphology of tensile fracture surface was observed and analyzed. The results showed that compared with polyamide 200 #, the introduction of the rosin ring into the dibasic acid can improve the rigidity and heat resistance of the flexible system in polyamide. The self-made grease / rosin based dibasic acid and triethylenetetramine Polyamide curing agent synthesized from raw materials has the advantages of low viscosity, good mechanical properties and good heat resistance.