Degradation kinetics of ethylene-octene copolymer/wood flour biocomposites in dependence to filler content

2017 Global Conference on Polymer and Composite Materials

材料科学;化学

Zykova, A.K.^1,2 ; Pantyukhov, P.V.^1,2 ; Monakhova, T.V.^2 ; Popov, A.A.^1,2

Department of Chemistry and Physics, Plekhanov Russian University of Economics, 36 Stremyanny Lane, Moscow

117997, Russia^1

Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4 Kosygina Street, Moscow

119334, Russia^2

关键词: Biodegradation in soil;    Biodegradation test;    Degradation kinetics;    Ethylene-octene copolymers;    Higher specific area;    Laboratory conditions;    Oxidative degradation;    Thermal oxidative degradation;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/213/1/012012/pdf
DOI  :  10.1088/1757-899X/213/1/012012

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

This article is focused on thermal oxidative degradation and biodegradation in soil of biocomposites based on ethylene-octene copolymer (EOC), filled by wood flour (from 30 to 70% wt.), in dependence to the filler content. The study of oxidative degradation of composites was carried out at two temperatures (80 and 130C respectively). The induction period and the rates of oxidation were determined. It was concluded that as filler content raises, the induction period increases. It can be explained by the higher specific area of composites in comparison with pure EOC. However, high filled composites (60 and 70 % of the filler) are oxidized with a huge induction period because polyphenols in the filler inhibit the oxidation process. Biodegradation test under laboratory conditions was carried out to investigate the biodegradability of the material. Composites with lower filler content have lower weight loss rate. Small particles are capsulated by polymer and are isolated from moisture and microorganisms. On the other hand, at a high filling of the composite small particles stick together and act as large ones. Such filler agglomerates are connected with each other and allow microorganisms to penetrate into the composite. It was concluded as filler content raises the mass loss increases.