Properties of Composites Based on Linear Low Density Polyethylene (LLDPE) and by Sol-gel Method Modified Fibres

Baltic Polymer Symposium 2015

材料科学;化学

Zelca, Z.^1 ; Kukle, S.^1 ; Kajaks, J.^2 ; Rucevska, I.^1 ; Vihodceva, S.^1

Riga Technical University, Faculty of Material Science and Applied Chemistry, Institute of Design Technologies, Kipsalas Street 6, Riga

LV-1048, Latvia^1

Riga Technical University, Faculty of Material Science and Applied Chemistry, Institute of Polymer Materials, P. Valdena Street 3, Riga

LV-1048, Latvia^2

关键词: Composite samples;    Grafted polyethylene;    Hydrolytic conditions;    Melt flow index;    Properties of composites;    Silica xerogel;    Sol-gel polymerization;    Tetraethyl orthosilicates;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/111/1/012012/pdf
DOI  :  10.1088/1757-899X/111/1/012012

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

The influence of sol-gel modified fibres content on the melt flow index (MFI) and water absorption of a linear low density polyethylene was investigated. The fibres were modified with silica xerogel prepared by the sol-gel polymerization of tetraethylorthosilicate (TEOS) under hydrolytic conditions using acid catalysis. Alkali pre-treatment was used for some variants and some composite samples were prepared by adding maleic anhydride grafted polyethylene (MA-g-PE). It was found out that melt flow index increases using sol-gel method for hemp fibres modification with fibres content in composite 40 and 50 wt%. Composite with fibres modified by sol-gel method content 40 wt% water absorption were evaluated in a range from 8.5 to 16.32%, but for composites with 50 wt% - 12.12%.