실리카에 담지된 메탈로센 촉매에서 실리카의 소성온도가 폴리에틸렌(PE) 중합에 미치는 영향 = The effect of calcination temperature of silica over silica supported metallocene on polythylene(PE) polymerizatioin

다국어 초록 (Multilingual Abstract)

Since the discovery of olefin polymerzation with Zigler-Natta catalysts, polyolefin has become one of the most important polymers in chemical industry. The discovery of new crystalline polymers was highly evaluated as "revolution of polymer science". In 1980, it was reported that metallocene could be activated with methylaluminoxane (MAO) and had high activity in polyethylene (PE) polymerization. However, even though homogeneous metallocene has high activity, it has some problems in chemical process (such as reactor fouling). To solve these problems supported metallocene has been studied from many other chemical groups by using silica (SiO2), alumina (A1203) and magnesia(MgO) support.
Recently it is reported that thermal treatment of silica surface can controll hydroxyl group (OH-) on the silica surface which is an important functional group to load homogeneous meatallocene. It is known that loading amount of metallocene affects the catalytic activity. The purpose of this study is to find relationship between the amount of hydroxyl group on the silica surace and the loading amount of metallocene, and also to find relationship between the loading amount of metallocene and the catalytic activity in PE polymerization.