【摘要】 利用单宁酸与聚乙二醇二缩水甘油醚合成了单宁基聚醚多元醇（TAPP），并将其用于环氧树脂。通过对其环氧固化物的力学、热力学及断裂面形态结构的测试和分析研究了其对环氧树脂性能的影响。结果表明，添加少量TAPP即可显著地改善环氧树脂的柔韧性，并保持其强度和模量。TAPP添加质量分数为3%时，改性环氧树脂断裂伸长率达到7.99%，拉伸韧性为3.84 MJ/m~3，较纯环氧树脂分别提高27.64%和20.04%。TAPP与环氧固化物产生微相分离，达到了提升韧性的目的。TAPP的添加未引起环氧固化物热稳定性的明显变化。更多还原

【Abstract】 The tannin-based polyether polyols(TAPP)were synthesized from tannic acid and poly(ethylene glycol)diglycidyl ether and the TAPP were used for epoxy resins. The effects of TAPP on the properties of epoxy resin were investigated by testing and analyzing the mechanical properties,thermodynamic properties and fracture surface morphological structure of their epoxy cured products. The results showed that the flexibility of epoxy resin was significantly improved by addition of a small amount of TAPP,while the strength and modulus of epoxy resin were maintained. The elongation and tensile toughness of modified epoxy resins with 3 wt% TAPP were 7.99% and 3.84 MJ/m~3 respectively. Compared with pure epoxy resin,they were increased by 27.64% and 20.04%,respectively. The microphase separation was formed between TAPP and epoxy cured product and the purpose of improving toughness was achieved. The addition of TAPP did not cause a significant change in the thermal stability of the epoxy cured products.更多还原