化学交联高密度聚乙烯的结构与性能  

Structureand Properties of Chemically Crosslinked High-Density Polyethylene

作　　者：王慧杰 张宜鹏 廖辉荣 曹金波 WANG Huijie;ZHANG Yipeng;LIAO Huirong;CAO Jinbo(Beijing Huateng Jingyan Technology Co.,Ltd.,Beijing 100084,China)

机构地区：[1]北京华腾京研科技有限公司,北京100084

出　　处：《塑料》2024年第5期28-32,37,共6页Plastics

摘　　要：采用过氧化物引发交联高密度聚乙烯(HDPE),分析了交联后样品的微观结构、交联剂含量、助交联剂含量及HDPE树脂种类对交联高密度聚乙烯(XL-HDPE)的交联度、力学性能及热性能的影响,确定了最佳交联条件,并将制备的XL-HDPE与进口交联高密度聚乙烯(XLPE-H)进行了对比。结果表明,采用2种不同的HDPE,随着交联剂含量和助交联剂含量的增加,XL-HDPE的交联度和冲击强度均呈现增大的趋势,断裂伸长率、熔融温度、结晶温度及结晶度均呈下降的趋势。当交联剂的含量为0.3份时,制备的XL-HDPE的冲击强度能达到100kJ/m^(2)以上,断裂伸长率达到400%以上,与XLPE-H相比,其拉伸应变及冲击强度均较好,证明了制备的XL-HDPE具有较好的力学性能。The crosslinking of high-density polyethylene(HDPE)was initiated by peroxide,and the effects of microstructure,crosslinking agent dosage,dosage of crosslinking agent,and HDPE resin type on the crosslinking degree,mechanical properties,and thermal properties of the crosslinked sample were investigated.The optimal crosslinking conditions were determined,and the prepared XL-HDPE was compared with imported cross-linked high-density polyethylene(XLPE-H).The results showed that using two different types of HDPE,the crosslinking degree and impact strength of XL-HDPE showed an increasing trend with the increase of crosslinking agent and co crosslinking agent dosage,while the elongation at break,melting temperature,crystallization temperature,and crystallinity showed a decreasing trend.Moreover,when the dosage of crosslinking agent was 0.3 parts,the impact strength of XL-HDPE prepared could reach over 100 kJ/m^(2),and the elongation at break could reach over 400%.Its tensile strain and impact strength were superior to XLPE-H,and it had good mechanical properties.

关 键 词：高密度聚乙烯 过氧化物 交联 断裂伸长率 冲击强度 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]