Synthesis and characterization of fluorene end-labeled polymers prepared by nitroxide-mediated polymerization

被引：10
|
作者：
Contrella, Nathan D. [1 ]
Tillman, Eric S. [1 ]
机构：
[1] Bucknell Univ, Dept Chem, Lewisburg, PA 17837 USA
来源：
POLYMER | 2008年 / 49卷 / 19期
关键词：
polystyrene; nitroxide-mediated polymerization; chromophore;
D O I：
10.1016/j.polymer.2008.07.038
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
The fluorene-based alkoxyamine 9-(2,2,6,6-tetramethyl-4-hydroxypiperidinyloxy)fluorene was prepared and investigated as a unimolecular initiator in the nitroxide-mediated polymerization (NMP) of styrene. Reactions performed in either bulk or ethereal solvents at 125 degrees C generated polymers possessing low polydispersity indices (PDIs) and number average molecular weight (Mn) values close to those anticipated based on monomer-to-initiator ratios. A linear relationship between monomer conversion and Mn values was observed by analysis of reaction aliquots with H-1 NMR and gel permeation chromatography (GPC), while PDI values remained low throughout. Analysis of the polymers by UV-vis spectroscopy indicated that approximately 80% of the polymer chains were labeled with the fluorene chromophore, while fluorescence spectroscopy was used to verify that the fluorene was polymer-bound. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码：4076 / 4079
页数：4
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