Abstract

Two polyethylene samples, one (PE-10) blended with 10% hydrogenated petroleum resin (HPR) and one (PE-0) blended without HPR, were used to investigate the structural evolution and deformation behavior during sequential biaxial stretching and the properties of films after stretching. During the process of stretching in the machine direction (MD), the addition of HPR affected the movement of molecular chains and the slip and rearrangement of lamellae, the orientation rate of the samples slowed down, and the fibril structure and voids reduced. During stretching along the transverse direction (TD), the molecular chains and lamellar structure orientation of PE-10 samples were faster, due to the less fibrillar structures and voids. In addition, the mechanical properties and puncture resistance of PE-0 and PE-10 samples after biaxial stretching were excellent, and the mechanical properties of PE-10 film in TD direction were slightly better than that of PE-0 film.

中文翻译：

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氢化石油树脂对聚乙烯薄膜双向拉伸过程中结构演变及性能的影响

摘要

使用两种聚乙烯样品，一种 (PE-10) 与 10% 氢化石油树脂 (HPR) 共混，一种 (PE-0) 不含 HPR，用于研究连续双轴拉伸过程中的结构演变和变形行为以及薄膜的性能拉伸后。在纵向（MD）拉伸过程中，HPR的添加影响了分子链的运动和片层的滑移和重排，样品的取向速率减慢，原纤维结构和空隙减少。在沿横向（TD）拉伸过程中，由于纤维结构和空隙较少，PE-10样品的分子链和层状结构取向更快。另外，双向拉伸后PE-0和PE-10样品的力学性能和耐穿刺性能均优异，其中PE-10薄膜TD方向的力学性能略优于PE-0薄膜。