of epdm rubber 2 and a third with the 10 parts of the triblock replaced by 10 parts of epdm properties of the blends are given in table 3 the effect of replacing part or all of the triblock with epdm is a slight increase in izod impact and a slight decrease in gardner impact strength table 3______________________________________ t y elong izod gardner psi ft lbs in in lbs ______________________________________8 triblock 10 400 63 3 8 2309 triblock 10 100 76 4 6 210 epdm 50 5010 epdm 9 800 75 6 2 170______________________________________ control compositions of 78 parts of poly 2 6 dimethyl 1 4 phenylene ether 22 parts of triphenyl phosphate and 10 parts of the specified epdm rubber were extruded and molded along with a control blend that did not contain any epdm rubber ______________________________________ izod impact gardner impactepdm rubber ft lbs 1 8 34 notch in lbs ______________________________________11 nordel 1500 5 8 17012 epcar 847 5 2 15013 none 1 2 50______________________________________ epcar 847 is a terpolymer of ethylene propylene and 5ethylidene 2 norbornene containing about 65 ethylene 30 propylene and 5 of 5ethylidene 2 norbornene control compositions of 55 parts poly 2 6 dimethyl 1 4 phenylene ether 45 parts of an epdm modified high impact polystyrene and 5 parts of nordel 1500 epdm rubber was extruded and molded a control composition that did not contain nay of the nordel 1500 epdm rubber was also prepared these compositions had the following properties ______________________________________ izod impact gardnerepdm rubber elongation ft lbs.