| PP/EPDM/玻璃微珠复合材料挤出流动性的研究 |
| Flow behaviour of PP/EPDM/GB composite during extrusion |
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| DOI： |
| 中文关键词: PP EPDM 玻璃微珠 复合材料 挤出流动性 |
| 英文关键词: PP EPDM glass bead composite extrusion flowability |
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| 中文摘要: |
| 采用恒速率型毛细管流变仪，考察463 K下PP/EPDM/玻璃微珠复合材料的挤出流动性。结果表明，复合材料流体的流道壁面剪切应力（τw）与表观剪切速率（γa）呈幂律关系（γa＝700 s-1处为折点）；剪切粘度（ηw）随着剪切速率（γw）的增大而减小；ηw与温度的关系符合Arrhenius方程；玻璃微珠表面改性和EPDM接枝改性对ηw的影响不大；γw一定时，ηw随着玻璃微珠体积分数（Φg）的增大而增大；表面改性（用硅烷偶联剂）玻璃微珠的复合材料流体的ηw较大，且对Φg的敏感性较强。 |
| 英文摘要: |
| The flow behaviour of PP/EPDM/glass bead (GB) composite during extrusion at 463 K was investigated with a constant rate capillary rheometer.The results showed that the shear stress of the composite fluid on the running channel wall τw and the apparent shear rate γa obeyed the power law (with turn point at γa＝700 s-1)；the shear viscosity ηw decreased as the shear rate γw increased；the dependence of ηw on temperature obeyed the Arrhenius equation；the surface modification of GB and the graft modification with EPDM had little effect on ηw；and with a constant γw，ηw increased as the volumefraction Φg of GB increased，at the same time ηw of PP/EPDM/GB modified with silane couplingagent was higher and more sensitive to Φg. |
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