This work reports the study of the compatibilization of the blend of biopolyethylene and biopolyamide 6.10, both biobased. In this work, two polymers functionalized with maleic anhydride (PE-g-MA and SEBS-g-MA) were used as compatibilizers of the blend. The blends were prepared in a single screw extruder and subsequently molded by injection. SEM results showed the immiscibility of the Bio-HDPE/PA6.10 blend. With the addition of the compatibilizers, a compatible interface was formed. The DSC results showed changes in the crystallization behavior of the two phases with the addition of compatibilizers. FTIR results suggested that there was a reaction between the maleic anhydride of the compatibilizers and the terminal amino groups of the polyamide. The blend containing PE-g-MA showed greater stiffness, with an increase in the modulus of elasticity in relation to Bio-HDPE, while the blends containing SEBS-g-MA showed excellent resistance to impact and high elongation at break.

This study involved an evaluation of the influence of phase inversion in poly(methyl methacrylate) elastomer/poly(ethylene terephthalate) binary blends (PMMAelast/PET) and the effect of the addition of poly(methyl methacrylate-glycidyl methacrylate-ethyl acrylate) (MGE) interfacial compatibilizer on the microrheological properties of this polymer blend. Thermal, dynamic mechanical thermal, rheological and morphological analyses were performed using sensitive techniques such as differential scanning calorimetry (DSC), dynamic mechanical thermal analysis (DMTA), parallel plates rheometry in the linear viscoelastic region, and atomic force microscopy (AFM), respectively. In this study, it was found that variations in the percentage of the PET phase influenced the correlation between the rheological properties at low shear rates and the morphology of the PMMAelast/PET binary blend and of the PMMAelast/PET/MGE compatibilized blend.

The aim of this work was to evaluate the interfacial tension from the poly(butylene terephtalate) and poly(styrene-co-acrylonitrile) (PBT/SAN) interface region using the drop retraction method. SAN filaments were sandwiched between two PBT films; the whole system was heated up to 240 °C, in a hot stage coupled to an optical microscope. The rheological parameters of the PBT/SAN system were obtained by parallel plates rheometry. An increase of the interfacial tension with the PBT molecular weight was observed with values between 0.57 and 1.06 mN/m, depending on the molecular weight. Theoretical values were calculated using the geometric-mean and harmonic-mean equations and were found to be similar to the experimental results. Viscosity measurements showed that the higher the SAN/PBT viscosity ratio, the lower the interfacial tension of these blends.