The influence of hydrogenated petroleum resin E5415 on the crystallization behavior, crystallization kinetics and mechanical properties of polyethylene for biaxially stretched films were systematically investigated by differential scanning calorimetry, small-angle X-ray scattering, wide-angle X-ray diffraction, melt flow index measurements and tensile mechanical performance test. The experimental results showed that the addition of E5415 inhibited the crystallization behavior of PE and reduced its crystallization rate. With the increase of E5415 content, the crystallinity and lamella thickness of PE/E5415 blends decreased significantly, which facilitated the subsequent biaxially stretching. At the same time, the liquid E5415 at high temperature made it easier for PE molecular chains to move freely and improved the processing performance of PE.

采用差示扫描量热法、小角X射线散射、广角X射线衍射、熔体流动指数等方法系统研究了氢化石油树脂E5415对双轴拉伸聚乙烯结晶行为、结晶动力学和力学性能的影响测量和拉伸机械性能测试。实验结果表明，E5415的加入抑制了PE的结晶行为，降低了其结晶速率。随着E5415含量的增加，PE/E5415共混物的结晶度和片层厚度显着降低，有利于后续的双轴拉伸。同时，高温液态E5415使PE分子链更容易自由移动，提高了PE的加工性能。