摘要
以普通角形二氧化硅为原料,采用氧-乙炔火焰法制备出球形二氧化硅。将环氧树脂(E-51)、固化剂(906)、固化促进剂(DMP-30)和球形化前后二氧化硅按照不同的比例经机械搅拌混合、超声分散和升温固化(100℃、2h和150℃、2h)后制备出二氧化硅/环氧树脂复合材料。研究对比球形化前后二氧化硅对环氧树脂浇注体系热学和力学性能的影响。结果表明:球形二氧化硅的加入,提高了环氧树脂的热稳定性,添加量30%时热分解温度达到最大值340℃,球形化后二氧化硅/环氧树脂复合材料热膨胀系数和初始黏度较球形化前明显降低,力学性能得到提高。
Spherical silica was prepared from ordinary silica by oxygen-acetylene flame method.The epoxy resin,curing agent,curing accelerator,ordinary silica and spherical silica were mixed at different proportions to prepare silica/epoxy resin composite by ultrasonic dispersion and heating curing.The effects of ordinary silica and spherical silica on thermal and mechanical properties of epoxy resin casting system were studied.The results show that the thermal stability of the epoxy resin is improved with the addition of spherical silica,the thermal decomposition temperature reaches the maximum value （340℃） when the spherical silica content is 30%.Compared with ordinary silica/epoxy resin composite,the thermal expansion coefficient and initial viscosity of spherical silica/epoxy resin comnposite decrease obviously,while the mechanical properties increase.
出处
《塑料科技》
CAS
北大核心
2010年第2期74-77,共4页
Plastics Science and Technology
