摘要
采用自制的圆锥式混炼器对环氧树脂(EP)/ZnO晶须复合材料进行共混。研究了ZnO晶须含量、混炼器混合和机械混合两种方式以及混炼器混炼间隙对EP/ZnO晶须复合材料力学性能和导热系数的影响。研究发现,无论采用何种混合方式,随着ZnO晶须含量的增加,EP/ZnO晶须复合材料的力学性能都呈现出先增大后减小的趋势;混炼器混合的效果好于机械混合。EP/ZnO晶须复合材料的拉伸强度和冲击强度在混炼器混炼间隙为1 mm、ZnO晶须质量分数分别为5%和2%时取得最大值,分别为31.55 MPa和12 kJ/m2,相比同体系下的机械混合方式,EP/ZnO晶须复合材料的拉伸强度和冲击强度分别提高了14.3%和74.4%。继续增大混炼器混炼间隙会导致EP/ZnO晶须复合材料的力学性能变差。EP/ZnO晶须复合材料的导热系数随ZnO晶须含量的增加而增大,但混合方式对其影响不大;当ZnO晶须含量相同时,随着混炼器混炼间隙的增大,EP/ZnO晶须复合材料的导热系数有小幅增加。
A self-made conical mixer was used to improve the dispersion behaviors of ZnO whisker in epoxy resin. Mechanical properties and thermal conductivities were investigated to discuss the influences of the content of ZnO whisker, the ways of the mechanical mixing and the conical mixer mixing, and the mixer clearance of the conical mixer. The results show that, no matter what the mixing method is, the mechanical properties of EP / ZnO whisker composites are increase with increasing ZnO whisker content to some extent and then decrease at higher ZnO whisker content. Compared to the mechanical mixing, better results are achieved when the conical mixer is used. The maximum tensile strength ( 31.55 MPa ) or the impact strength ( 12.0 kJ/m^2 ) of the composites are obtained with addition of 5% or 2%(mass fraction) ZnO whisker when the mixer clearance is 1 mm with 14.3% or 74.4% increase compared to mechanical mixing. Further increasing mixing clearance of the conical mixer will leads to worse results. Thermal conductivities of the composites is mainly affected by the ZnO whisker content, while mixing method do not have much influence on it. When ZnO whisker content is the same, a small increase of thermal conductivities of the composites is obtained with the increasing the mixer clearance
出处
《工程塑料应用》
CAS
CSCD
北大核心
2014年第6期40-44,共5页
Engineering Plastics Application