Influences of Compatibilizer on Mechanical Properties of LLDPE/PA6 Blends

Abstract

Multilayer films, which combine polyethylene layer and polyamide layer are frequently used to wrap food in. However, the material recycling of this film is commercially less interesting because the direct melting process ing of the film leads to the immiscible and incompatible polymeric blends. In this study, mechanical properties of the blends of linear low-density polyethylene（ LLDPE） and polyamide 6（ PA6） which were model blends of the multilayer films and incorporation of maleic anhydride grafted polypropylene（ MPP） as compatibilizer were investigated. PA6 particles dispersed in LLDPE increased modulus, decreased impact strength and did not vary tensile yield stress. Incorporation of MPP increased impact strength significantly, because the MPP minimized significantly the PA 6 particles in the blends. However, the incorporation of MPP did not vary mod ulus and tensile yield stress. Incorporation of MPP as compatibilizer to LLDPE / PA6 blends was an excellent method which realize both high modulus and high impact strength.