PE/CaO复合材料的流变行为

Rheological Properties of PE/CaO Composites

通过熔融共混法制备CaO含量不同的PE/CaO复合材料,借助熔体流动速率仪和AR2000旋转流变仪,对PE/CaO复合材料熔体的流变行为进行研究。结果表明:PE/CaO复合材料的黏流活化能随CaO含量的增加先上升后逐渐下降;当CaO含量(质量分数,下同)≤20%时,复合材料的线性黏弹性与纯PE相近,零剪切黏度变大的幅度较小;当CaO含量≥25%时,复合材料的时间稳定性下降,零剪切黏度明显增大。

PE/CaO composites were prepared by blending polyethylene（PE） and calcium oxide（CaO）.The rheological properties of PE/CaO composites were investigated by Melt Flow Rate Instrument and AR2000 Rotation Rheometer.The results indicated that the flow activation energy of PE/CaO composites first increased and then decreased with increasing CaO content.Under lower CaO content（mass fraction,the same below） ≤20%,the linear viscoelasticity of the composites were the same to that of PE,and the zero shearing viscosity（η0） of the composites largened within a small range.Under higher CaO content（≥25%）,the time stability of the composites decreased and the zero shearing viscosity（η0） increased evidently.