聚氨酯改性环氧树脂的合成及其复合材料性能研究

STUDY ON THE SYNTHESIS AND PROPERTIES OF PU/EP COMPOSITE

以2,4-甲苯二异氰酸酯、聚乙二醇为主要原料合成端异氰酸酯基聚氨酯预聚体,与环氧树脂混合,用D-230进行固化,得到PU/EP复合材料。研究了聚氨酯不同含量对环氧树脂力学性能的影响,并用FTIR进行了表征,通过DMA研究了PU/EP复合材料的阻尼性能。结果表明,加入聚氨酯明显改善了EP的性能。

Isocyanate-terminated polyurethane was synthesized with polyethylene glycol and toluene disocyantes,which was used to modify the epoxy resin. Chose D-230 as hardener to produce the PU/EP composite. Mechanical properties of the epoxy resin with different PU contents were studied, and the epoxy resin was also characterized by FTIR. Additionally, damping properties of the PU/EP composite were investigated using DMA, and the results showed that the damping properties of EP was evidently improved by blending with PU, and with the testing frequency increased, the spectra of tanδ-T shifted to higher temperature.