MECHANICAL-PROPERTIES AND COMPATIBILITY OF HIGH-DENSITY POLYETHYLENE WITH SOME OLIGOESTERS

Miscibility of high density polyethylene and modifiers was evaluated u sing polymer polymer interaction parameter and determined with the hel p of inverse gas chromatography. Mechanical, rheological properties an d melting point changes were investigated. Measurements of mechanical properties showed that alloying of high density polyethylene with diff erent oligoesters may produce higher strength and elongation than pure PE. The results obtained showed that compatibility of PE and additive s may influence overall characteristics of the compositions. Mechanica l properties of compatible alloys change monotonously when the concent ration of modifiers increases. For unmiscible systems, the relationshi p between mechanical properties and oligoester concentration appears t o display a curve with extremum. The performed study made it possible to choose optimum systems for use as an optical cable.