耐温PE-HD管材专用料的结构与性能  

Structure and properties of temperature⁃resistant PE⁃HD pipe material

作　　者：祝景云 谷凤来 鄢薇 衣惠君 ZHU Jingyun;GU Fenglai;YAN Wei;YI Huijun(Beijing Yanshan Petrochemical High-Tech Company Limited,Beijing 102500,China;Beijing Yanshan Petrochemical Synthetic Resin Plant,Beijing 102500,China)

机构地区：[1]北京燕山石化高科技术有限责任公司,北京102500 [2]北京燕山石化合成树脂厂,北京102500

出　　处：《中国塑料》2022年第12期24-30,共7页China Plastics

摘　　要：采用红外光谱、差示扫描量热仪、凝胶渗透色谱、核磁共振仪等分析了高密度聚乙烯(PE-HD)8100M与进口同类样品的微观结构;对交联后的性能进行研究。结果表明,降低熔体流动速率、窄的分子量分布、加入共聚单体有助于交联度的提高。8100M熔体流动速率设计合理,具有较高的重均分子量、较窄的分子量分布;8100M粉料粒径分布集中,平均粒径较粗,有利于助剂的均匀分散;PE-HD的交联首先在大分子之间进行,交联后拉伸性能有所降低;8100M挤制的管材通过分级认证,为PE80级管材。The microstructures of the domestic PE⁃HD product(8100M)and some imported PE⁃HD products were com⁃paratively analyzed using infrared spectrum,differential scanning calorimeter,gel permeation chromatography,and nu⁃clear magnetic resonance.The performance of cross⁃linked PE⁃HD samples was further investigated.The results indicat⁃ed the cross⁃linking degree of PE⁃HD could be improved by reducing MFR,enlarging molecular weight distribution,and adding co⁃monomer.The design for the MFR of PE⁃HD 8100M was considered to be reasonable,together with a high average molecular weight and narrow molecular weight distribution.The PE⁃HD 8100M powders exhibited a concentrat⁃ed particle size distribution and a larger average particle size.This facilitates the uniform dispersion of additives in the ma⁃trix.The cross⁃linking reaction of PE⁃HD first occurs between macromolecules,resulting in a decrease in the tensile properties of PE⁃HD decreased after cross⁃linking.The extruded pipe based on PE⁃HD 8100M passed the classification certification and was assessed to be the PE80 grade pipe material.

关 键 词：过氧化物交联 高密度聚乙烯 管材 平均粒径 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]