Grafting polymer chains bearing an <i>N</i>
-succinimidyl activated ester end-group onto primary amine-coated silica particles and application of a simple, <i>one-step</i>
approach via nitroxide-mediated controlled/living free-radical polymerization
作者:Julien Parvole、Lucas Ahrens、Hélène Blas、Jérôme Vinas、Cédric Boissière、Clément Sanchez、Maud Save、Bernadette Charleux
DOI:10.1002/pola.23775
日期:2010.1.1
based on the nitroxide SG1 and bearing an N‐succinimidyl ester function was used to synthesize a variety of well‐defined polymers with the activated ester group at the α‐end. The grafting of those polymer chains onto primary‐amine functionalized Stöber silica particles was performed in soft conditions at room temperature and was studied as a function of the polymer chain length, the type of solvent,
在第一部分中,基于氮氧化物SG1衍生自BlocBuilder®并具有N-琥珀酰亚胺酯功能的烷氧基胺引发剂被用于合成各种具有明确定义的,在α-末端带有活化酯基的聚合物。这些聚合物链的接枝是在室温下在柔和条件下进行的,在伯胺官能化的Stöber二氧化硅颗粒上进行了接枝,并根据聚合物链长,溶剂类型以及聚合物和胺的浓度进行了研究。聚合物接枝密度主要在0.1–0.2链nm -2范围内。为了在简单的实验条件下提高接枝密度,随后提出了一种直接的一步法:伯胺改性的二氧化硅,N将琥珀酰亚胺基酯官能化的烷氧基胺和单体全部一次引入反应介质中。该技术允许在一个步骤中在聚合温度下(即,苯乙烯为120°C)同时进行接枝和链增长,并生产出具有非常高的接枝密度,高达0.9链nm -2且长的杂化颗粒。聚合物链。©2009 Wiley Periodicals,Inc. J Polym Sci A部分:Polym Chem 48:173–185,2010年