Propriedades mecânicas, térmicas e morfologia da blenda de biopolietileno de alta densidade/poliamida 6.10 compatibilizada com polietileno e estireno-etileno/butileno-estireno funcionalizados com anidrido maleico

Abstract

The present work aimed to study the mechanical and thermal properties and the morphology of blends of high density biopolyethylene (Bio-HDPE) and biopolyamide 6.10 (PA6.10) compatible with polyethylene functionalized with maleic anhydride (PEg-MA) and styrene-ethylene/butylene-styrene functionalized with maleic anhydride (SEBS-g-MA). The compatibility efficiency of PE-g-MA and SEBS-g-MA was evaluated using Differential Scanning Calorimetry (DSC), Scanning Electron Microscopy (SEM) and mechanical tensile and impact tests. SEM results showed the immiscibility of the Bio-HDPE/PA6.10 blend. With the addition of PE-g-MA and SEBS-g-MA, a compatible interface and a more refined morphology were formed. In the DSC analysis it was possible to observe changes in the crystallization behavior of both the dispersed phase and the matrix phase with addition of compatibilizer. The mechanical tensile tests indicate an increase in deformation at blend rupture with the addition of PE-g-MA and SEBS-gMA. Blends containing only PE-g-MA showed higher stiffness, while blends containing SEBS-g-MA showed excellent impact strength and high elongation at break.