이산화탄소/프로필렌옥사이드 공중합용 고활성 촉매 제조방법
Preparation of a Highly Active Catalyst for CO2/Propylene oxide Copolymerization
- 주제(키워드) 이산화탄소 , 공중합 , 살렌타입 균일촉매
- 발행기관 아주대학교
- 지도교수 이분열
- 발행년도 2009
- 학위수여년월 2009. 2
- 학위명 석사
- 학과 및 전공 일반대학원 분자과학기술학과
- 실제URI http://www.dcollection.net/handler/ajou/000000009524
- 본문언어 영어
- 저작권 아주대학교 논문은 저작권에 의해 보호받습니다.
초록/요약
A highly active catalytic system for CO2/(propylene oxide) copolymerization was prepared based on the concept of a system containing a Lewis acidic metal center and quarternary ammonium salts units. The catalytic system showed high activity (TON >20000; TOF >20000 h-1) even at high temperature and high [epoxide]/[catalyst] ratio and selectively producing a very high molecular-weight copolymer (Mn, 300,000). The catalyst can be easily separated by filtration through a short pad of silica gel to obtain polymer containing negligible amounts of metal residue (1-2 ppm). The separated catalyst can be reused without significant loss in catalytic performance.
more목차
Table of Contents
Chapter 1. Highly Active and Recyclable Catalytic Systems for CO2/(Propylene Oxide)
Copolymerization.......................................................1
1. Introduction............................................................2
2.Result and Discussion.............................................6
2.1SynthesisandCharacterization.................................6
2.2polymerizationstudies............................................8
2.3Catalyst Recovery Strategy....................................11
2.4 Conclusion.........................................................17
3. Experiment Section...............................................17
4. Reference............................................................33
5. Figures................................................................36
Chapter 2. Efficient Synthetic Route for A Highly Active Catalyst for
CO2/(Propylene Oxide) Copolymerization...................59
1. Introduction..........................................................60
2. Result and Discussion...........................................61
3. Experiment Section...............................................65
4. Reference............................................................70
5. Figures................................................................72
