摘要
对E51环氧树脂改性双酚A型氰酸酯(BADCy)体系的力学性能及热性能进行了研究,发现当E51环氧树脂的质量含量为5%时,改性体系的弯曲强度和冲击强度分别由原来的95 6MPa和9 24kJ/m2提高到了117 8MPa和12 6kJ/m2,而热变形温度仅下降8℃。以该改性体系为基体制作的M40J复合材料,其弯曲强度、模量和剪切强度分别高达:1270MPa,172GPa,68 9MPa。消泡剂BYK141能提高M40J/BADCy复合材料的力学性能,层间剪切强度可提高到77 1MPa。M40J/BADCy复合材料还具有良好的耐环境能力,是一种理想的航空航天结构材料。
The mechanical and thermal properties of bisphenol A dicyanate (BADCy) modified by epoxy resin E51 are studied. It is found that, when 5% (mass fraction) epoxy resin E51 is introduced, the flexural strength and impact strength of BADCy can be improved from 95.6 MPa and 9.24 kJ/m2 to 117.8 MPa and 12.6 kJ/m2 respectively, but the heat deformation temperature of this system only decreases 8°C. The flexural strength, flexural modulus and interlaminar shear strength of composite made from M40J and BADCy modified by 5% (mass fraction) epoxy resin E51 are as high as 1270 MPa, 172 GPa and 68.9 MPa respectively. Little amount of defoamer BYK 141 can improve the mechanical properties of M40J/BADCy composites. The interlaminar shear strength is improved from 68.9 MPa to 77.1 MPa.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2004年第4期411-415,共5页
Acta Aeronautica et Astronautica Sinica
基金
国家自然科学基金(50273029)
西北工业大学研究生创业种子基金(Z20030099)资助项目
