丁基取代环辛烯的开环易位聚合反应
Ring-Opening Metathesis Polymerization of Butyl Substituted Cyclooctenes.
作者信息
Farrell Wesley S, Beers Kathryn L
机构信息
Materials Science and Engineering Division, National Institute of Standards and Technology, ǂ Gaithersburg, Maryland 20899, United States.
ǂ Official contribution of the National Institute of Standards and Technology; not subject to copyright in the United States.
出版信息
ACS Macro Lett. 2017 Aug 15;6(8):791-795. doi: 10.1021/acsmacrolett.7b00420. Epub 2017 Jul 13.
Abstract
The synthesis and ring-opening metathesis polymerization of highly-strained 3- and 1-butyl--cyclooctenes was investigated with the goal of quickly preparing regioregular polymers with narrow molar mass distributions, which could serve as precursors for high precision short-chain branched polyethylene. 3-butyl--cyclooctene was unable to be polymerized in a regioregular manner, however 1-butyl--cyclooctene did yield regioregular product, although the dispersities were higher than expected. Investigation by NMR provided evidence that the nature of the propagating alkylidene is likely non-uniform throughout the course of the reaction, leading to the broadened molar mass distribution.
摘要
研究了高张力3-丁基-和1-丁基-环辛烯的合成及开环易位聚合反应，目的是快速制备具有窄摩尔质量分布的区域规整聚合物，这些聚合物可作为高精度短链支化聚乙烯的前体。3-丁基-环辛烯无法以区域规整的方式聚合，然而1-丁基-环辛烯确实产生了区域规整产物，尽管分散度高于预期。核磁共振研究提供的证据表明，在整个反应过程中，增长的亚烷基的性质可能不均匀，导致摩尔质量分布变宽。
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