The effect of additions of ethylene copolymers on the mechanical properties of filled polyolefin composites based on polyethylene 10803-020 and whiting was investigated. It was established that the best deformation properties are ensured by introducing copolymers of ethylene with propylene with an ethylene content of 50–70%. It was shown that the increase in elongation at break when the copolymers are introduced is connected with amorphisation of the polymer base.
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