塑料科技2024，Vol.52Issue(11)：100-104,5.DOI:10.15925/j.cnki.issn1005-3360.2024.11.020
低剂量γ辐照微交联结构对不同支链长度线性低密度聚乙烯的流变性能影响
Effect of Micro-Crosslinking Structure of Low Dose γ-Irradiation on Rheological Properties of Linear Low-Density Polyethylene with Different Branch Chain Lengths
摘要
Abstract
In order to improve the performance of polyethylene(PE)products without changing the existing process of film blowing,casting,extrusion,low dose γ irradiation was carried out to realize the micro-crosslinking of linear low-density polyethylene(LLDPE)materials in this work.The effects of low absorbed dose and annealing temperature on the micro-crosslinking structure and rheological behavior of three types of LLDPE with different branch chain lengths(Grades:2045G,2645G and 7042)were investigated.The results showed that the storage modulus and complex viscosity of the three types of LLDPE increased with the increase of absorbed dose,yet the damping factor decreased.The rheological properties of LLDPE were unaffected by the annealing temperature.When the absorbed dose was 5 kGy,the storage modulus of 7042,2645G and 2045G increased by 815%、580%and 388%,respectively,indicating that the shorter the branch chain length of LLDPE,the higher the degree of micro-crosslinking.These results demonstrated that the three types of LLDPE with low absorbed dose formed micro-crosslinking structures,effectively improving their rheological properties and melt strength,highlighting the potential for modifying polyolefin products through micro-crosslinking structure of low dose irradiation.关键词
γ辐照/低吸收剂量/线性低密度聚乙烯/微交联/流变性能Key words
γ irradiation/Low absorbed dose/LLDPE/Micro-crosslinking/Rheological property分类
化学化工引用本文复制引用
雷亨,毛选之,张帆,张茂江,邢哲,吴国忠..低剂量γ辐照微交联结构对不同支链长度线性低密度聚乙烯的流变性能影响[J].塑料科技,2024,52(11):100-104,5.基金项目
国家自然科学基金项目(22176194) （22176194）
国家自然科学基金项目(22206016) （22206016）
