Study of Compatibility of Binary and Ternary Ethylene Copolymers

Thermoplastic adhesive composites based on polyolefins are widely used in various industries. The mutual solubility of components in mixtures of binary and ternary ethylene copolymers, as well as their mutual crystallization, was studied by means of laser interferometry and differential scanning calorimetry using ethylene–vinyl acetate and ethylene–alkyl acrylate–maleic anhydride copolymers as examples. Complete compatibility of the copolymers at temperatures above their melting temperatures was demonstrated. Upon cooling, the components cocrystallize in the systems, forming a crystalline phase that includes macromolecules of both copolymers.