研究了聚乙二醇(PEG)/硅藻土复合助剂对聚丙烯(PP)流变行为和力学性能的影响.结果表明,PEG/硅藻土复合助剂明显降低了聚丙烯树脂熔体黏度,改善了加工性能.复合助剂含量越多,降粘效果越显著.DSC和偏光显微镜分析表明,加入复合助剂可以诱导β晶的生成,使PP球晶细化,PP的冲击强度和断裂伸长率得到提高.
The diatomite was blended with polyethylene glycol(PEG) to prepare binary aid and the effects of binary aid on the rheological behaviors and mechanical properties of polypropylene(PP) were studied.The results show that the addition of binary aid significantly reduces the PP melt viscosity and improves its processing performance.The more the binary aid is added, the more obvious the viscosities of polymer melts decline.The differential scanning calorimetry(DSC) and polarization optical microscopy(POM)analysis indicate that PEG/ diatomite binary aid can induce the formation of β-crystal and refine PP spherulites.The mechanical properties of PP such as the impact strength and the elongation at break are improved.
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