STABILIZATION OF POLYETHYLENE BY NATURAL FILLERS AND THEIR EXTRACTS
Abstract
The possibility of using natural fillers, as well as their extracts as antioxidant additives for polyethylene, was studied. Dried and shredded buckwheat husk sowing (Fagopyrum esculentum), carposome of crab-of-the-woods (Laetiporus sulphureus), carposome of chaga mushroom (Inonotus obliquus), thallus of lichen of oakmoss (Everonia prunastri) were used as natural fillers. Polymer films were made from mixtures of powders of low-pressure polyethylene and natural fillers (the first type of samples) or from a mixture of polyethylene powder and an extract of natural fillers (the second type of samples) by thermal pressing. The degree of oxidation of polyethylene films was controlled by IR spectroscopy.
The paper shows that the stabilization of the polyethylene structure proved to be the most effective when used as an additive to the polymer of an extract of the oakmoss (Evernia prunastri). The result is attributed to the presence of secondary lichen metabolites in the extract. The introduction of dry residues of natural fillers proved to be ineffective for polymer stabilization.
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