Mechanical properties and compatibility of sulfonated poly(ethylene terephthalate)/cyclic olefin copolymer/maleic anhydride-grafted polyethylene-octene elastomer

A compatibilizer was added to blends of sulfonated poly(ethylene terephthalate) (SPET) and cyclic olefin copolymer (COC) and the effects were studied. The compatibilizer was maleic anhydride-grafted polyethylene-octene elastomer (POE-g-MA). It was hoped that maleic anhydride (MA) would react with carbonyl groups in the SPET molecules, owing to POE and COC being olefinic polymers and therefore compatible with each other. The compatibilization effects of the 80SPET/20COC/15POE-g-MA composite were measured using a dynamic mechanical analyzer (DMA) and scanning electron microscopy (SEM). Mechanical properties and rheological behavior were also studied. The results showed that there are partial compatibilizations for SPET/POE-g-MA and SPET/COC cases. Because POE-g-MACOCSPET in viscosity, COC in SPET has particle size 1-3m and POE-g-MA has particle size 5-30m, both resulting in almost no difference in impact strength.