RECYCLING OF WASTE FROM POLYVINYL CHLORIDE MATERIAL PRODUCTION BY HIGH-TEMPERATURE SHEAR DEFORMATION

Abstract

Recycling of recycled polymer raw materials, in particular PVC waste, is undoubtedly one of the key components of the modern world. A significant place among PVC-based waste is occupied by linoleum, foam, laminated wallpaper, sanitary PVC pipes, artificial leather for haberdashery and technical purposes, agricultural and insulating films, PVC hoses, containers, used packaging. Currently, there are no effective ways to recycle them, so most of the waste is disposed or incinerated.This article shows the possibility of using dispersed powder materials obtained by high-temperature shear grinding of waste from the production of polyvinyl chloride materials. The design of a rotary dispersant for carrying out the process of high-temperature shear grinding of polymer products is considered.It has been established that in the process of waste PVC material recycling simultaneously with the process of high-temperature shear grinding, it is possible to modify the polymer material by introducing 1–3 wt. fr. of metal-containing heat stabilizers and 10–30 wt. fr. of plasticizers into the feedstock. This leads to an increase in the thermal stability margin by 15–50 min and an improvement in the flow rate of the melt processed together with ester plasticizers of the material by 20–35 %, as well as an improvement in the manufacturability of the dispersion process.The conducted research suggests an economically and environmentally beneficial possibility of recycling polyvinyl chloride materials, and opens up ways to create technological schemes closed in material and energy flows.