CAJ | 학술논문

研制了化学反应法高效载体钛催化剂，主催化剂制备的加料顺序为MgCl2、n-C4H9OH、i-Bu3Al、TiCl4，然后与i-Bu3Al组成高活性催化体系。用此催化剂进行乙丙共聚，常温常压下催化效率可达190 kg/g以上，聚合反应具有三个显著特征：催化活性高，较钒体系提高20倍以上；共聚反应催化效率大大高于乙烯、丙烯各自均聚的催化效率；丙烯在此催化体系下具有比其它催化体系更高的共聚活性。
연제료화학반응법고효재체태최화제，주최화제제비적가료순서위MgCl2、n-C4H9OH、i-Bu3Al、TiCl4，연후여i-Bu3Al조성고활성최화체계。용차최화제진행을병공취，상온상압하최화효솔가체190 kg/g이상，취합반응구유삼개현저특정：최화활성고，교범체계제고20배이상；공취반응최화효솔대대고우을희、병희각자균취적최화효솔；병희재차최화체계하구유비기타최화체계경고적공취활성。
MgCl2-supported titanium catalyst prepared by chemical reaction method with the components added in the sequence of MgCl2/n-BuOH/i-Bu3Al/TiCl4 and then activated by i-Bu3Al at normal pressure showed much higher activity in the copolymeriation of ethylene and propylene than in homopolymerization of either ethylene or propylene. The apparent r1 and r2 for ethylene and propylene copolymerization were determined to be 7.44 and 0.22, respectively for this catalyst, showing a very high relative activity of propylene as compared to cases reported before. A Tg of - 50 ℃ of this copolymer was representative of EP rubber. Studies by DSC, WAXD and DMA revealed that the copolymers were random EP copolymers with very low or little crystallinity. Explanations as to the higher activity of the catalyst and copolymer monomer sequence distribution are also disCussed