多壁碳纳米管改性等规聚丙烯复合材料的结构及性能研究  

Structure and Mechanical Properties of Isotactic Polypropylene Composites Modified by Multi-walled Carbon Nanotubes

作　　者：刘忠柱 赵伟[3] 潘玮[1] 李睢水[3] 郑国强 李倩[2] LIU Zhongzhu;ZHAO Wei;PAN Wei;LI Suishui;ZHENG Guoqiang;LI Qian(School of Materials and Chemical Engineering,Zhongyuan University of Technology,Zhengzhou 450007,China;School of Mechanics&Safety Engineering,Zhengzhou University,Zhengzhou 450001,China;Materials Science and Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]中原工学院材料与化工学院,郑州450007 [2]郑州大学力学与安全工程学院,郑州450001 [3]郑州大学材料科学与工程学院,郑州450001

出　　处：《材料导报》2023年第1期227-232,共6页Materials Reports

基　　金：中原工学院青年骨干教师(2019XQG05);中原工学院基本科研业务费专项资金项目(K2022QN009);中国纺织工业联合会指导性项目(2018070,2021046)。

摘　　要：通过熔融共混法制备出等规聚丙烯(iPP)/多壁碳纳米管(MWCNTs)复合材料并对其进行热行为和流变性能测试,结果表明,iPP/MWCNTs复合材料的熔点、复数粘度、储能模量G′和损耗模量G″均大于纯iPP;iPP和iPP/MWCNTs的复数粘度均随着频率增加而减小,表现出明显的“剪切变稀”现象,即呈现出假塑性流体行为。通过注塑成型技术分别制备出iPP和iPP/MWCNTs制品,X射线测试结果表明,iPP和iPP/MWCNTs复合材料制品的结晶度相当,并且其值不随距离皮层深度的增加而发生较大变化。另外,iPP/MWCNTs复合材料制品的取向度整体偏高并且该值随距离皮层深度的增加而逐渐降低。拉伸测试结果表明,与纯iPP制品相比,iPP/MWCNTs复合材料制品的拉伸强度和杨氏模量有较大幅提高,而其断裂伸长率和韧性呈相反趋势。Isotactic polypropylene(iPP)and multi-walled carbon nanotubes(MWNTs)composites were manufactured by melt blending and its thermal behavior and rheological properties were investigated.The results show that the melting temperature,complex viscosity,storage modulus(G′)and loss modulus(G″)of iPP/MWCNTs composites are higher than that of pure iPP.Moreover,the complex viscosity of iPP and iPP/MWCNTs composites decreases with the increase of frequency,showing an obvious phenomenon of‘shear thinning’and a pseudo-plastic fluid behavior.iPP and iPP/MWCNTs products were,respectively,prepared via injection molding technology.X-ray test results show that the crystallinity of iPP and iPP/MWCNTs composite products is constant,and its values do not change significantly with the increase of depth.Moreover,the overall orientation value of iPP/MWCNTs composite products is relatively higher and decreases gradually with the increase of depth.The tensile test results show that,compared with the pure iPP products,the tensile strength and modulus of iPP/MWCNTs composite products are greatly increased,and the elongation at break and toughness are obviously reduced.

关 键 词：多壁碳纳米管 等规聚丙烯 注射成型 流变行为 力学性能 

分 类 号：TQ320.66[化学工程—合成树脂塑料工业]