A Step Towards High-Molecular-Weight Living/Controlled Polystyrene Using SG1-Mediated Polymerization

被引：13

作者：

Lansalot, Muriel ^{[1
,2
,3
]}

Guillaneuf, Yohann ^{[1
,2
,3
]}

Luneau, Benoit ^{[1
,2
,3
]}

Acerbis, Sebastien ^{[1
,2
,3
]}

Dufils, Pierre-Emmanuel ^{[1
,2
,3
]}

Gaudel-Siri, Anouk ^{[1
,2
,3
]}

Gigmes, Didier ^{[1
,2
,3
]}

Marque, Sylvain R. A. ^{[1
,2
,3
]}

Tordo, Paul ^{[1
,2
,3
]}

Bertin, Denis ^{[1
,2
,3
]}

机构：

[1] Univ Aix Marseille 2, F-13397 Marseille 20, France

[2] Univ Aix Marseille 3, CNRS, F-13397 Marseille 20, France

[3] Univ Aix Marseille 1, UMR 6264, Lab Chim Prov, F-13397 Marseille 20, France

来源：

MACROMOLECULAR REACTION ENGINEERING | 2010年 / 4卷 / 6-7期

关键词：

computer modeling; controlled radical polymerization (CRP); high molecular weight; living polymerization; polystyrene; FREE-RADICAL POLYMERIZATION; ABSOLUTE RATE CONSTANTS; NITROXIDE-MEDIATED POLYMERIZATION; CHAIN-LENGTH DEPENDENCE; N-BUTYL ACRYLATE; ACETIC-ANHYDRIDE; STYRENE; KINETICS; ALKOXYAMINES; MECHANISM;

D O I：

10.1002/mren.200900074

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The synthesis of high-molecular-weight living/controlled polystyrene by NMP was studied. The combination of Ac2O and alkoxyamines based on nitroxides TEMPO, TIPNO, and SG1 was tested at 130 degrees C. With TEMPO and TIPNO, dipole/dipole interactions led to a decrease in nitroxide concentration and an acceleration of the reaction. To minimize thermal auto-initiation and thus obtain high-(M) over bar (n) PS, the temperature was lowered. At 90 degrees C, the use of BlocBuilder yielded PS of (M) over bar (n) = 210 000 g.mol(-1) with a living fraction of 60%. Finally, new SG1-based nitroxides were used to perform the polymerization at 75 degrees C. Since these nitroxides were too constrained, the decrease in k(c) caused a loss of control and livingness for high-(M) over bar (n) polymers.

引用

页码：403 / 414

页数：12

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