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.
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.
出处
《材料研究学报》
EI
CAS
CSCD
北大核心
2002年第5期512-516,共5页
Chinese Journal of Materials Research
