Kinetic and mechanistic study of the quasiliving cationic polymerization of styrene with the 2-phenyl-2-propanol/AlCl3 &middot OBu2 initiating system

被引：0
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作者：
Kostjuk, Sergei V. [1 ]
Dubovik, Alexei Yu. [1 ]
Vasilenko, Irina V. [1 ]
Frolov, Alexander N. [1 ]
Kaputsky, Fyodor N. [1 ]
机构：
[1] Research Institute for Physical Chemical Problems, the Belarusian State University, Leningradskaya St., 14, 220050 Minsk, Belarus
来源：
European Polymer Journal | 2007年 / 43卷 / 03期
关键词：
The cationic polymerization of styrene with the 2-phenyl-2-propanol (CumOH)/AlCl3 &middot OBu2 initiating system at various dibutyl ether concentrations in a mixture of 1,2-dichloroethane and n-hexane (55:45 v/v) at -15 °C was investigated. The experimental results showed that an increase in dibutyl ether concentration leads to a noticeable decrease in the polymerization rate as well as to the more controlled polymerization in terms of molecular weight (Mn) and molecular weight distribution (MWD) evolutions. The kinetic investigation revealed that the polymerization proceeds in two stages. The first stage is characterized by high polymerization rate and slow initiation relative to propagation. During this stage molecular weight decreases or does not change and MWD increases with conversion. In the second stage considerably slower quasiliving polymerization of styrene occurs. The quasiliving nature of the styrene polymerization by the CumOH/AlCl3 &middot OBu2 system is proved and mechanistic scheme of the polymerization is proposed. © 2006 Elsevier Ltd. All rights reserved;
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页码：968 / 979
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