| 초록 |
Ultra high molecular weight polypropylene (UHMWPP) is much higher than general-purpose PP and usually means a molecular wcigt more than 1 millon. UHMWPP is expected to have special properties such as high strength and high heat resistance etc.1,2 But the processability of UHMWPP is very poor due to it’s high melt viscosity. To Improve processability, we blended low molecualr weight polypropylene (LMWPP) and UHMWPP using a Kneader. The processability of the blends was studied with the kneader, that indicates the maximum blend composition. The mechanical, thermal and rheological properties of blends changed by the percent of LMWPP. As the percent of LMWPP incease, the mechanical properties of blend like yield tensile strength, elongation at break and tensile strength at break tend to decrease. But there is a lttle increase from 30% LMWPP blend. The TGA data is not changed dynamically. A melt index (MI) value derease as the percent of LMWPP increse. (1) P. Agrawal et al., Polym. Bull., (2021). (2) X. Jiang et al., Polym. J., 38, 419 (2006). |
