流动改性剂对超高分子量聚乙烯流变性能的影响  

Effect of Flow Modifier on Rheological Properties of Ultra-High Molecular Weight Polyethylene

作　　者：朱鹤翔 孙小杰 江猛 李亚飞 ZHU He-xiang;SUN Xiao-jie;JIANG Meng;LI Ya-fei(National Institute of Clean-and-Low-Carbon Energy,Beijing 102211,China)

机构地区：[1]北京低碳清洁能源研究院,北京102211

出　　处：《塑料科技》2023年第12期38-42,共5页Plastics Science and Technology

摘　　要：通过加入高密度聚乙烯、自制流动改性剂,研究超高分子量聚乙烯的动态流变性能。结果表明:高密度聚乙烯和少量流动助剂的加入可显著提高超高分子量聚乙烯的熔体流动速率(MFR),从0.01 g/10 min以下提高至1.5 g/10 min。流动改性剂的添加不影响共混物的分子量和链结构,但能显著降低分子链缠结,缩短分子链松弛时间,有助于共混物的挤出加工。高密度聚乙烯与超高分子量聚乙烯共混物有较好的相容性,随着共混物中高密度聚乙烯含量升高,弯曲模量增加,缺口冲击强度变化不大;而流动改性剂与共混物相容性较差,缺口冲击强度随流动改性剂含量增加迅速下降。By adding high-density polyethylene and self-made flow modifiers,the dynamic rheological properties of ultra-high molecular weight polyethylene were studied.The results show that the addition of high-density polyethylene and a small amount of flow aid can significantly increase the MFR of the ultra-high molecular weight polyethylene from less than 0.01 g/10 min to 1.5 g/10 min.The addition of the flow modifier does not affect the molecular weight and chain structure of the blends,but it can significantly reduce the molecular chain entanglement,shorten the molecular chain relaxation time,and help the extrusion processing of the blends.The blends of high-density polyethylene and ultra-high molecular weight polyethylene have good compatibility.As the content of high-density polyethylene in the blends increases,the bending modulus increases,and the notch impact strength does not change much.However,the compatibility between flow modifiers and blends is poor,and the notch impact strength rapidly decreases with the increase of flow modifier content.

关 键 词：超高分子量聚乙烯 动态流变性能 力学性能 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]