Method for producing ultrahigh molecular weight polyethylene

[0039] Using a 2L reactor, carry out at least 3 times N 2 Purging to remove water and deoxygenation treatment, add 600ml of hexane, and add 8mg of main catalyst with hexane, appropriate amount of co-catalyst, Al / Ti in co-catalyst / main catalyst is 100:1, appropriate amount of external electron donor dimethyl dimethyl Oxysilane, dimethyldimethoxysilane / Ti=0.2 (molar ratio), the total amount of hexane added is 1L, the temperature of the reaction system is raised, when the temperature rises to 65°C, ethylene gas is added, and the reaction is carried out at a constant pressure of 0.7Mpa , control the reaction temperature at 72°C until the end of the polymerization, lower the temperature and exhaust, separate the solid and liquid phases, and dry to obtain ultra-high molecular weight polyethylene. The experimental results are shown in Table 1.

[0041] Adjust the amount of external electron donor added, dimethyldimethoxysilane / Ti=0.1 (molar ratio), other conditions are the same as in Example 1, and the experimental results are shown in Table 1.

[0043] Adjust the amount of external electron donor, dimethyldimethoxysilane / Ti=0.5 (molar ratio), other conditions are the same as in Example 1, and the experimental results are shown in Table 1.