纳米SiO_2改性聚丙烯薄膜的制备及力学性能研究  

Preparation of Polypropylene/Nano-scale SiO_2 Composites and Study of Its Mechanical Property

作　　者：常欢[1] 李东立[1] 刘辉[1] 何昊威 

机构地区：[1]北京印刷学院印刷包装材料与技术北京市重点实验室,北京102600

出　　处：《北京印刷学院学报》2016年第6期68-70,74,共4页Journal of Beijing Institute of Graphic Communication

基　　金：国家自然科学基金(31471653);北京市教育委员会协同创新科技项目(04190116008)

摘　　要：为了提高聚丙烯薄膜的力学性能,研制了一种纳米Si O2改性剂,采用熔融共混法将纳米改性剂填充到聚丙烯树脂中,流延、双向拉伸制备聚丙烯/纳米Si O2复合薄膜,并对其拉伸性能、穿刺性能等力学性能及阻隔性能(透湿)进行测试。结果表明,当纳米Si O2质量分数为0.8%时,改性薄膜的拉伸强度较未改性薄膜提高18%,杨氏模量提高58%,断裂伸长率提高65%。In order to improve the mechanical properties of polypropylene film , an agent for SiO2 modification is syntheses in this paper , by blending functionalized SiO2 with poly-propylene resin particles in melt statue and a series of modified polypropylene composites films are prepared by casting , biaxial stretching. Then the mechanical properties of tension , puncture resistance and barrier properties of the water vapor transmittance rate are measured. The experiments show that silica in the amount of 0. 8% can make the tensile strength of PP increase by 18% , the Young’s modulus of PP increase by 58% , and the elongation at break of PP increase by 65% .

关 键 词：纳米二氧化硅 双向拉伸 聚丙烯 力学性能 

分 类 号：TQ326.14[化学工程—合成树脂塑料工业]