Abstract: This experiment adopted three types of polypropylene (PP) with the brand of FL7641L, TF400, PPH-T03 as toughening agent, and three kinds of polyolefin elastomer (POE) with the brand of 8540, 9071, DF810 and polyolefin elastomer grafted maleic anhydride (POE-g-MAH) as compatibilizer, using the method of blending modification to study on toughening modification of nylon 66. The result showed that: the POE-g-MAH was apparent on toughening effect of nylon 66. The PP with brands of TF400 had toughening effect within a certain range, and the toughening effect of POE was not obvious; the toughening agents all made the mass flow rate (MFR) of blending material decrease; In PP/POE-g-MAH/nylon 66 blending material, when the content of PP was 8% (mass fraction, the same below), the content of POE-g-MAH was 15%, the content of nylon 66 was 77%, the impact strength of blending materials reached 11. 09 kJ/m2, it was 397. 5% as much as pure nylon 66. It can significantly improve the impact properties of nylon 66.

Key words: polypropylene, polyolefin elastomer, polyolefin elastomer grafted maleic anhydride, nylon 66, toughening modification