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纳米TiO2对不饱和聚酯树脂(TiO2/UPR)的改性
引用本文:徐颖,卢凤纪,李贺军.纳米TiO2对不饱和聚酯树脂(TiO2/UPR)的改性[J].材料研究学报,2002,16(5):512-516.
作者姓名:徐颖  卢凤纪  李贺军
作者单位:1. 西安交通大学
2. 西北工业大学
摘    要: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。

关 键 词:改性  纳米TiO2  不饱和聚酯树脂  二氧化钛  增韧  增强
文章编号:1005-3093(2002)05-0512-05
修稿时间:2001年7月2日

UNSATURATED POLYESTER RESINS MODIFICATED BY NANOMETER TiO2 POWDER(TiO2/UPR)
XU Ying,LU Fengji,LI Hejun.UNSATURATED POLYESTER RESINS MODIFICATED BY NANOMETER TiO2 POWDER(TiO2/UPR)[J].Chinese Journal of Materials Research,2002,16(5):512-516.
Authors:XU Ying  LU Fengji  LI Hejun
Abstract:The UPR(Unsaturated Polyester Resins)has been toughened and strengthened by using the nanometer Ti02 powder and an obvious brittle-tough transformation was observed while utilizing the simple-support-beam impact strength to characterize its toughness. The critical content of the nanometer TiO2 is 6% (mass fraction).The flexural-strength and impact-strength and impact-strength of nanometer Ti02/UPR increases by 55% and 46% from those of the UPR, respectively. The micro appearance observation of the impact fracture showed that the fracture pattern of the nanometer TiO2/UPR changes from typical brittle to typical tough fracture near the critical point.
Keywords:nanometer TiO2  unsaturated polyester resins (DPR)  brittle-tough transformation  
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