2.1. Materials
For the blend systems studied in this work a low, low/medium and high molar mass nylon6 was used (Mw≈18.500, 25.000 and 47.000 g mol−1, respectively, and density ). All nylons (tradename Akulon) were kindly supplied by DSM.
For the rubber phase two different EPDM rubbers and two different modified EPDM rubbers were used, all having a high molecular weight and density ρ=0.88 g ml−1. The two EPDM rubbers differ in the ethylene–propylene ratio: 75/25 and 45/55 wt%. These rubbers were kindly supplied by DSM, tradename Keltan. The two modified rubbers that have been used were: a maleic anhydride (MA) modified ethylene–propylene (75/25 wt%) diene terpolymer (0.5 wt% MA), type Royaltuf 465A and a MA modified ethylene–propylene (50/50 wt%) diene terpolymer (1 wt% MA), type Royaltuf 465. These rubbers were kindly supplied by Uniroyal.
Also two MA modified EPM rubbers (0.7 wt% MA) were used, both having a relatively low molecular weight. The two modified EPM rubbers differ in the ethylene–propylene ratio; 75/25 and 50/50 wt%. These rubbers were kindly supplied by Exxon Chemical, trade name Exxelor.