| 초록 |
Among the commodity plastics, polypropylene (PP) has been attracted in the automobile industry due to the its lightness, low cost and good processability. However, PP shows low impact strength and abrasion resistance to be used in automotive parts. To overcome theses shortcoming, linear PP was modified by the free radical initiator with the complex crosslinkers of trimethylolpropane trimethacrylate (TMPTMA) and divinylbenzene (DVB) through the twin screw extruder (Bautek, L/D=40, 19Φ). The addition of complex crosslinkers could increase the MI rather than linear PP. Also, all PPs, modified by complex crosslinkers indicated the improved impact strength and abrasion resistance compared with linear PP. It is attributed to the crystallization kinetics of crosslinked PP. As a result, the introduction of complex crosslinkers could improve the impact strength, abrasion resistance and processability simultaneously. |
