서지주요정보
실리카 담지 메탈로센 촉매를 이용한 폴리올레핀 제조에서 분자량 분포조절에 관한 연구 = (A) study on the molecular weight distribution control of polyolefins over silica supported metallocene catalysts
서명 / 저자 실리카 담지 메탈로센 촉매를 이용한 폴리올레핀 제조에서 분자량 분포조절에 관한 연구 = (A) study on the molecular weight distribution control of polyolefins over silica supported metallocene catalysts / 이기수.
저자명 이기수 ; Lee, Ki-Soo
발행사항 [대전 : 한국과학기술원, 1996].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8006575

소장위치/청구기호

학술문화관(문화관) 보존서고

MCHE 96020

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

In order to control molecular weight distribution(MWD) of polyolefin(polyethylene, polystyrene), several kinds of silica supported metallocene catalysts were prepared with various metallocene and different preparation conditon. MWDs of polyethylene prepared by $SiO_2$-supported $Cp_2ZrCl_2$ and $Cp_2HfCl_2$ catalysts were narrow($M_w/M_n=2.5~3.7$), while those by $SiO_2$-supported titanocene catalyst were very broad($M_w/M_n=5~13$). Polymerizations of ethylene were performed over various $SiO_2$-supported titanocene catalysts under different polymerization conditions to correlate MWD of polyethylene with polymerization condition and preparation condition of catalyst. As Al/Ti mole ratio in ethylene polymerization increase, polydispersity of polyethylene increase. Moreover, as increasing the Al/Ti mole ratio in the prepared catalyst, MWD of polyethylene is broader. Therefore, it is speculated that new active sites were generated via interaction of titanium and Al compound. MWD of syndiotactic polystyrene could be controlled by using hybrid catalyst(homogeneous or heterogeneous type) or varying polymerization temperature. Hybrid catalyst is consist of two metallocene compounds which have different propagation rate and termination rate. MWDs of syndiotactic polystyrenes prepared with hybrid catalysts were somewhat broader($M_w/M_n=2~4$) than prepared over homogeneous metallocene catalysts($M_w/M_n < 2.0$).

서지기타정보

서지기타정보
청구기호 {MCHE 96020
형태사항 ii, 69 p. : 삽도 ; 26 cm
언어 한국어
일반주기 저자명의 영문표기 : Ki-Soo Lee
지도교수의 한글표기 : 임선기
지도교수의 영문표기 : Son-Ki Ihm
학위논문 학위논문(석사) - 한국과학기술원 : 화학공학과,
서지주기 참고문헌 : p. 64-69
주제 메탈로센
올레핀중합
메틸알루미녹산
분자량분포
Metallocene
Olefin polymerization
Methylaluminoxane
Molecular weight distribution
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