| 초록 |
Ultra High Molecular Weight Polyethylene (UHMWPE) is a linear polyethylene with molecular weights over 1.0×10-6 and is known as high modulus PE or high performance PE. UHMWPE is a polymer with a unique combination of wear resistance and low-friction surface properties and is also characterized by a good corrosion resistance and impact strength. In order to prepare UHMWPE, the polymerization of ethylene was carried out with various Ziegler-Natta catalysts and cocatalyst under mild conditions, and the viscosity average molecular weight of obtained PE was found to range from 1.0×10-6 to 7.5×10-6. The effects of cocatalyst on the catalyst activity, the melting temperature, crystallinity as well as molecular weight of PE were investigated. |
