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中文摘要：
采用二氧化硅对不饱和聚酯树脂进行增强增韧，发现在所采取的试验条件下，SiO2的添加量对材料性能有显著影响，添加量为8％（质量分数）时拉伸断裂能达最大值，添加量为8％～12％时所得复合材料有较低的固化收缩率．用红外光谱法研究复合材料中分子特征基团的变化及氢键对材料性能的影响，发现在SiO2添加量低于10％时，随添加量增加，不饱和双键和羟基的吸收峰显著增强．
英文摘要：
Silicon dioxide was used to strengthen and toughen unsaturated polyester resin. The results show that, in the employed experimental conditions, the performances of the product are greatly affected by the dosage （ mass fraction） of silicon dioxide, that the tension fracture energy reaches the maximum value at a SiO2 dosage of 8% , and that the curing shrinkage rate becomes low at a SiO2 dosage of 8% - 12%. Moreover, FT-IR spectra were used to reveal the effects of the characteristic groups and hydrogen bonds on the performances of the composite. The results indicate that the absorption peaks of unsaturated double bonds and hydroxyls greatly improve with SiO2 dosage when the dosage is less than 10%.
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