采用纳米ZnO(nano-ZnO)对不饱和聚酯树脂（UPR）进行改性，研究nano-ZnO添加量对nano-ZnO/UPR复合体系综合性能的影响。结果表明：nano-ZnO对UPR具有明显的增强增韧作用，随着nano-ZnO添加量的增加，nano-ZnO/UPR复合体系的黏度和凝胶时间随之增大，拉伸强度、弯曲强度和冲击强度均呈先增大后减小的趋势，吸水率呈先减小后增大趋势，当添加量为5%时，nano-ZnO/UPR复合体系的综合性能最好，固化反应的表观活化能(E)为51.6 kJ/mol，反应级数(n)为0.892。
Unsaturated polyester resin (UPR) was modified by nano-ZnO, and the effect of nano-ZnO addi-tion on the comprehensive properties of the nano-ZnO/UPR composite system was studied. The results show that the nano-ZnO has an obvious reinforcing and toughening effect on the UPR. With the increase of the nano-ZnO additive amount, the viscosity and gel time of the nano-ZnO/UPR composite system in-crease, the tensile strength, flexural strength, and impact strength increase at first and then decrease, and the water absorption decreases first and then increases. When the additive amount of nano-ZnO is 5%, the comprehensive properties of the nano-ZnO/UPR composite system are the best, the apparent activation energy(E) of curing reaction is 51.55 kJ/mol, and the reaction order(n) is 0.892.
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