INFLUENCE OF VARIOUS CELLULOSE ADDITIVES ON THE THERMAL PROPERTIES OF POLYETHYLENE COMPOSITIONS

摘要

The thermal properties of polyethylene with microcrystalline and nanocellulose additives were studied.The main temperature characteristics of the thermal and thermo-oxidative degradation of the obtained compositions were determined using the method of thermogravimetric analysis(TGA).The composition of pyrolysis products of composite materials was analysed using the method of pyrolytic chromatography-mass spectrometry(Py-GC/MS).The influence of microcrystalline and nanocellulose additives on the mass distribution of hydrocarbon pyrolysis products of composite materials is established.The results of TGA showed that the addition of microcrystalline and nanocellulose to polyethylene leads to an increase in the rate of the second stage of thermal oxidative degradation.As a result of studies using Py-GC/MS of high density polyethylene/microcrystalline cellulose and low density polyethylene/nano-cellulose compositions,it was found that the presence of cellulose fillers contributes to an increase in the content of lighter C8-C_(17)products compared to the original high density polyethylene and low density polyethylene.