Effect of a Hybrid Compatibilizer on the Mechanical Properties and Interfacial Tension of a Ternary Blend With Polypropylene, Pqly(lactic acid), and a Toughening Modifier

摘要

This study examined the effect of three compatibil-izers, namely, a hybrid compatibilizer composed of polypropylene-maleic anhydride (PP-g-MAH) and poly-ethylene-glycidyl methacrylate (PE-g-GMA), a single compatibilizer composed of PP-g-MAH, and a single compatibilizer composed of PE-g-GMA, on the mechanical, morphological, and rheological properties of a ternary blend of polypropylene (PP), poly(lactic acid; PLA), and a toughening modifier. The results of tensile strength, flexural strength, and impact strength tests for the ternary blends before and after hydrolysis, revealed that the ternary blend with a hybrid compatibilizer content of 3 phr exhibited better material properties than the blend containing a single compatibilizer. In the weighted relaxation spectra of the ternary blend using the Palierne emulsion model, the ternary blend containing the hybrid compatibilizer, exhibited only one relaxation spectrum peak at ~ 0.16 s. This result suggests that the ternary blend with the hybrid compatibilizer exhibits uncharacteristic morphological properties, that is, a single-phase microstructure. The above results suggest that the hybrid mixture is an effective compatibilizer for the ternary blend of PP, PLA, and a toughening modifier.