Influence of doping additive on thermophysical and rheological properties of halogen-free polymer composition for cable insulation and sheaths

Introduction. The demand for halogen-free fire-resistant compositions the manufacture of fire-retardant wires and cables is constantly growing. Problem. Therefore, creation further processing these materials an urgent problem. Goal. aim article to study effect doping additive on thermophysical rheological properties power with voltage 1 kV determination both temperatures phase structural transformations polymer compositions. Methodology. Experiments investigating were carried out help device thermogravimetric analysis differential scanning calorimetry TGA/DSC 1/1100 SF METTLER TOLEDO company. Rheological studies polymeric conducted by using method capillary viscosimetry in IIRT–AM. Results. influence formation supramolecular structure filled cable products was determined, that resulted temperature increase decomposition beginning 11 °С end 7 °С. Originality. a reducing effective melt viscosity composition from 6·104 1·104 Pa·s increasing shear rate has been shown first time. containing increases 0.5 20 s–1 stress. Practical value. research results provide opportunity reasonably approach development technological processes insulation sheaths