Impact of non-functionalized and ionic liquid modified carbon nanotubes on mechanical and thermal properties of ethylene- octene copolymer nanocomposites

Baltic Polymer Symposium 2015

材料科学;化学

Ivanova, T.^1 ; Meri, R Merijs^1 ; Zicans, J.^1 ; Grigalovica, A.^1 ; Roja, Zh^2 ; Reinholds, I.^2

Institute of Polymer Materials, Faculty of Material Science and Applied Chemistry, Riga Technical University, Paula Valdena Street 3/7, Riga

LV-1048, Latvia^1

Faculty of Chemistry, University of Latvia, Jelgavas street 1, LV-1004, Riga, Latvia^2

关键词: Concentration ranges;    Direct melt mixing;    Ethylene-octene copolymers;    Functionalizations;    Imidazolium ionic liquids;    Mechanical and thermal properties;    Mechanical stiffness;    Modified multi-walled carbon nanotubes;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/111/1/012019/pdf
DOI  :  10.1088/1757-899X/111/1/012019

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

In this article the development and characterization of composites made from metallocene based ethylene-octene copolymer (EOC) with 38% octene content, non-modified or modified multi walled carbon nanotubes (MWCNTs), covalently functionalised with long chain hexadecyl moiety imidazolium ionic liquid (IL-f-MWCNTs), is presented. The procedure of MWCNTs functionalization is discussed. In order to obtain a good dispersion of the filler, composites with MWCNTs and IL-f-MWCNTs in the concentration range of 0.5-12 wt.% were made by ultrasonication / thermoplastic mixing method. The results indicated improvement in mechanical properties with increase of the filler content. The methodology of the development of EOC matrix nanocomposites with IL-f-MWCNTs showed advantages of the conductive material creation with high mechanical stiffness compared to direct melt mixing of EOC with non-modified MWCNTs. A notable enhancement of thermal stability was observed in case of both pristine MWCNTs and IL-f-MWCNTs containing EOC nanocomposites, which was attributed to scavenging action of the nanofiller. Modification of EOC with IL-f-MWCNTs showed somewhat increased efficiency in enhancing overall thermal stability of the composites because of better dispersion of the nanofiller due to compatibilizing effect of IL modifier.