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纳米tio2对不饱和聚酯树脂(tio2/upr)的改性

Keywords: 纳米tio2,不饱和聚酯树脂,增韧,增强

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Abstract:

?将纳米tio2粉加入到不饱和聚酯中进行同时增韧增强改性,在用简支梁冲击强度表征纳米tio2/upr的韧性时,发现树脂有明显的脆韧转变现象,在脆—韧转变点tio2含量为6%(质量分数)。纳米tio2/upr弯曲强度和冲击强度分别比upr提高了55%和46%。在扫描电子显微镜下观测纳米tio2/upr的冲击断口形貌时发现,在脆—韧转变点附近纳米tio2/upr的微观形态发生了从脆性断裂到韧性断裂的形貌特征。

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