Simultaneous Enhancement of Toughness and Strength of Stretched iPP Film via Tiny Amount of β-Nucleating Agent under “Shear-free” Melt-extrusion  

作　　者：Zhong-Zhu Liu Guo-Qiang Zheng Hong-Hui Shi Chun-Tai Liu Li-Wei Mi Qian Li Xian-Hu Liu 

机构地区：[1]College of Material and Chemical Engineering,Henan Key Laboratory of Functional Salt Materials,Center for Advanced Materials Research,Zhongyuan University of Technology,Zhengzhou 450007,China [2]National Center for International Joint Research of Micro-Nano Molding Technology,School of Mechanics&Safety Engineering,Zhengzhou University,Zhengzhou 450002,China [3]College of Materials Science and Engineering,National Engineering Research Center for Advanced Polymer Processing Technology,Zhengzhou University,Zhengzhou 450001,China

出　　处：《Chinese Journal of Polymer Science》2021年第11期1481-1488,共8页高分子科学（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.11432003 and 11572290);Young Teacher Project of Zhongyuan University of Technology(No.2019XQG05)。

摘　　要：Herein,isotactic polypropylene films with smallβ-nucleating agent content were fabricated via a melt-extrusion-stretched technology with intended"shear-free"in barrel and die.Compared with neat films,the tensile strength,elongation at break and strain energy density at break of i PP film with 0.05 wt%β-nucleating agent are significantly improved by 13.8%,39.6%and 90.6%,respectively,indicating the simultaneously enhanced toughness and strength.Additionally,theβ-crystal content gradually increases with increasingβ-NA content,while the relative total daughter content ofα-andβ-crystal exhibits opposite tendency.Moreover,nucleation and crystal growth induced by variousβ-NA contents are different.This work proves an efficient strategy to enhance mechanical properties of isotactic polypropylene film via controlling elongation flow and addition of appropriateβ-NA content.

关 键 词：Melt-extrusion Isotactic polypropylene β-Nucleating agent Crystallization Mechanical properties 

分 类 号：TQ325.14[化学工程—合成树脂塑料工业] TB383.2[一般工业技术—材料科学与工程]