Improving the control of styrene polymerization at 60 °C using a dialkylated α-hydrogenated nitroxide
作者:Yohann Guillaneuf、Jean-Philippe Lamps、Jean-Marie Catala、Didier Gigmes、Eric Drockenmuller
DOI:10.1002/pola.26163
日期:2012.9.15
new dialkylated α‐hydrogenated linear nitroxide and the corresponding 1‐phenylethyl alkoxyamine were synthesized in two and three steps, respectively. The alkoxyamine was involved in the polymerization of styrene at 60 °C, and the in situ concentration of nitroxide was monitored by electron spin resonance spectroscopy. The enhanced characteristics of these new alkylated alkoxyamine and nitroxide (k
分别通过两步和三步合成了一种新的二烷基化α-氢化线性一氧化氮和相应的1-苯乙基烷氧基胺。该烷氧基胺在60℃下参与苯乙烯的聚合,并且通过电子自旋共振光谱法监测原位氮氧化物的浓度。这些新的烷基化的烷氧基胺和氮氧化物(k= 1.5×10 -4 s -1和k= 5.7×10 4 L mol -1 s -1)的增强的特性产生比苯乙烯热聚合高一个数量级的单体消耗。这产生了高达70,000 g mol -1的定义明确的聚苯乙烯并观察到通过建立基本持续效应而发生的控制,即ln([ M ] 0 / [ M ])= t 2/3。实验确定的动力学常数参与了PREDICI模型,以研究温度和初始烷氧基胺浓度对动力学的影响,以及对聚合反应的活性和控制特性的影响。©2012 Wiley Periodicals,Inc. J Polym Sci A部分:Polym Chem,2012年