稀土金属介导的组转移聚合:从定义的聚合物微结构到高精度的纳米尺度物体
Ning Zhang1, Stephan Salzinger, Benedikt S Soller
1Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China. ning.zhang@ciac.jl.cn
Journal of the American Chemical Society
|June 6, 2013
概括
活组转移聚合物化2-异-2-氧素 (IPOx) 和2-乙烯 (2VP) 的Bis(cyclopentadienyl) methylytterbium催化提供了精确的分子量控制. 这种罕见的N-协调机制使得新型聚焦素分子刷的合成成为可能.
科学领域:
- 有机金属化学 有机金属化学
- 聚合物科学 聚合物科学
- 催化剂是一种催化剂.
背景情况:
- 活体聚合技术对于精确的聚合物合成至关重要.
- 稀土金属催化剂在聚合过程中具有独特的反应性.
- 组转移聚合 (GTP) 提供受控的聚合物架构.
研究的目的:
- 使用新型催化剂合成聚二异二氧化 (PIPOx) 和聚二烯 (P2VP).
- 研究聚合的机制,重点关注单体协调.
- 探索复杂的聚合物结构的合成,就像分子刷一样.
主要方法:
- 使用bis ((cyclopentadienyl) methylytterbium (Cp2YbMe) 催化剂合成PIPOx和P2VP.
- 活群转移聚合 (GTP) 机制的研究.
- 共同聚合研究以确定相对单体协调强度.
- 接种-从方法与阴离子环开放聚合结合.
主要成果:
- 有效合成PIPOx和P2VP,具有受控的分子量和狭窄的分布.
- 通过在中心的N-协调来证明活的GTP机制.
- 建立的单体协调顺序:DEVP>MMA>IPOx>2VP.
- 成功地将PIPOx转化为具有定义结构的分子刷.
结论:
- Cp2YbMe是IPOx和2VP的活体GTP的有效催化剂.
- 稀土金属催化GTP中的N-协调机制具有重要意义.
- 这种方法允许创建先进的聚合物架构,包括分子刷.
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