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采用丙酮稀释含有促进剂DMP-30的环氧树脂(E-51)胶液,并以此胶液对E玻璃纤维进行包覆。通过示差扫描量热法、凝胶化实验和傅里叶变换红外光谱研究了DMP-30作用下环氧树脂的固化特性;通过弯曲强度实验和扫描电子显微镜分析探讨了丙酮对该树脂胶液包覆玻纤的增强效果。结果表明:环氧树脂E-51/固化剂甲基六氢苯酐/促进剂DMP-30质量比为100/72.9/1.5,固化工艺为102℃/0.5 h+124℃/1 h+141℃/1 h,丙酮质量分数为5%(以环氧树脂为基准)时,体系的弯曲强度比无丙酮稀释时提高了24.7%。这是由于丙酮降低了树脂胶液粘度,改善了树脂胶液与玻纤的界面结合,形成均匀的结合状态。
The epoxy resin (E-51) containing the accelerator DMP-30 was diluted with acetone and the E glass fiber was coated with the glue. The curing properties of epoxy resin were investigated by differential scanning calorimetry, gelation and Fourier transform infrared spectroscopy (FTIR). The effects of acetone on the curing properties of epoxy resin were investigated by flexural strength and scanning electron microscopy. Laminated glass reinforcement effect. The results showed that the mass ratio of epoxy resin E-51 / curing agent methylhexahydrophthalic anhydride / accelerator DMP-30 was 100 / 72.9 / 1.5 and the curing process was 102 ℃ / 0.5 h + 124 ℃ / 1 h + 141 ℃ / 1 h, and the mass fraction of acetone is 5% (based on epoxy resin), the flexural strength of the system increased by 24.7% compared with that without acetone. This is due to the fact that acetone reduces the viscosity of the resin glue and improves the bonding of the resin glue and the glass fiber to form a uniform bonding state.