molecules Article Improvement of Impact Strength of Polylactide Blends with a Thermoplastic Elastomer Compatibilized with Biobased Maleinized Linseed Oil for Applications in Rigid Packaging Ramon Tejada-Oliveros, Rafael Balart * , Juan Ivorra-Martinez , Jaume Gomez-Caturla, Nestor Montanes and Luis Quiles-Carrillo * Technological Institute of Materials (ITM), Universitat Politècnica de València (UPV), Plaza Ferrándiz y Carbonell 1, 03801 Alcoy, Spain;
[email protected] (R.T.-O.);
[email protected] (J.I.-M.);
[email protected] (J.G.-C.);
[email protected] (N.M.) * Correspondence:
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[email protected] (L.Q.-C.); Tel.: +34-966-528-433 (L.Q.-C.) Abstract: This research work reports the potential of maleinized linseed oil (MLO) as biobased compatibilizer in polylactide (PLA) and a thermoplastic elastomer, namely, polystyrene-b-(ethylene- ran-butylene)-b-styrene (SEBS) blends (PLA/SEBS), with improved impact strength for the packaging industry. The effects of MLO are compared with a conventional polystyrene-b-poly(ethylene-ran- butylene)-b-polystyrene-graft-maleic anhydride terpolymer (SEBS-g-MA) since it is widely used in these blends. Uncompatibilized and compatibilized PLA/SEBS blends can be manufactured by extrusion and then shaped into standard samples for further characterization by mechanical, thermal, morphological, dynamical-mechanical, wetting and colour standard tests. The obtained results indi- cate that the uncompatibilized PLA/SEBS blend containing 20 wt.% SEBS gives improved toughness Citation: Tejada-Oliveros, R.; (4.8 kJ/m2) compared to neat PLA (1.3 kJ/m2). Nevertheless, the same blend compatibilized with Balart, R.; Ivorra-Martinez, J.; 2 Gomez-Caturla, J.; Montanes, N.; MLO leads to an increase in impact strength up to 6.1 kJ/m , thus giving evidence of the potential Quiles-Carrillo, L.