, Volume 12, Issue 5, pp 355-359

Impact-Modified Poly(ethylene terephthalate)/Polyethylene-Octene Elastomer Blends

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Poly(ethylene terephthalate) (PET) is a low cost, high performance thermoplastics. However, its shortcoming is that it has poor impact-strength properties. High-impact strength PET was prepared using polyethylene-octene elastomer (POE) grafted with a toughener, maleic anhydride. The effect of the maleate compatibilizer on the interfacial adhesion and impact-strength properties of PET/POE blends was investigated through impact testing, scanning electron microscopy (SEM) observation, and rheological behavior analysis. The results showed that unmodified POE has hardly any contribution to the toughness of PET, whereas maleic anhydride-grafted POE (POE-g-MA) significantly improves the compatibility of POE and PET. The size of POE-g-MA particles in the PET matrix were sharply reduced due to interaction between POE-g-MA and PET during melt processing.