Synthesis of star polymers via nitroxide mediated free-radical polymerization: A "Core-First" approach using resorcinarene-based alkoxyamine initiators

被引：23

作者：

Abraham, Sinoj ^{[1
]}

Choi, Jae Ho ^{[1
]}

Ha, Chang-Sik ^{[1
]}

Kim, Il ^{[1
]}

机构：

[1] Pusan Natl Univ, Dept Polymer Sci & Engn, Pusan 609735, South Korea

来源：

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2007年 / 45卷 / 23期

关键词：

alkoxyamine; block copolymers; initiators; nitroxide-mediated radical polymerization; resorcinarene; star polymers;

D O I：

10.1002/pola.22302

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 synthesis of new octafunctional alkoxyamine initiators for nitroxide-mediated radical polymerization (NMRP), by the derivatization of resorcinarene with nitroxide free radicals viz TEMPO and a freshly prepared phosphonylated nitroxide, is described. The efficiency of these initiators toward the controlled radical polymerization of styrene and tert-butyl acrylate is investigated in detail. Linear analogues of these multifunctional initiators were also prepared to compare and evaluate their initiation efficiency. The favorable conditions for polymerization were optimized by varying the concentration of initiators and free nitroxides, reaction conditions, etc., to obtain well-defined star polymers. Star polystyrene thus obtained were further used as macro-initiator for the block copolymerization with tert-butyl acrylate. (c) 2007 Wiley Periodicals, Inc.

引用

页码：5559 / 5572

页数：14

共 89 条

[1] Self-assembly of star-shaped polystyrene-block-polypeptide copolymers synthesized by the combination of atom transfer radical polymerization and ring-opening living polymerization of α-amino acid-N-carboxyanhydrides [J].

Abraham, S ;

Ha, CS ;

Kim, I .

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 2006, 44 (09) :2774-2783

[2] Synthesis of poly(styrene-block-tert-butyl acrylate) star polymers by atom transfer radical polymerization and micellization of their hydrolyzed polymers [J].

Abraham, S ;

Ha, CS ;

Kim, I .

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, 2005, 43 (24) :6367-6378

[3] Microfluidics assisted synthesis of well-defined spherical polymeric microcapsules and their utilization as potential encapsulants [J].

Abraham, Sinoj ;

Jeong, Eun Ho ;

Arakawa, Takahiro ;

Shoji, Shuichi ;

Kim, Kyung Chun ;

Kim, Il ;

Go, Jeung Sang .

LAB ON A CHIP, 2006, 6 (06) :752-756

[4] Atom transfer radical polymerization of styrene using a novel octafunctional initiator: Synthesis of well-defined polystyrene stars [J].

Angot, S ;

Murthy, KS ;

Taton, D ;

Gnanou, Y .

MACROMOLECULES, 1998, 31 (21) :7218-7225

[5] Scope of the copper halide/bipyridyl system associated with calixarene-based multihalides for the synthesis of well-defined polystyrene and poly(meth)acrylate stars [J].

Angot, S ;

Murthy, KS ;

Taton, D ;

Gnanou, Y .

MACROMOLECULES, 2000, 33 (20) :7261-7274

[6]

[Anonymous], 1979, ADV POLYM SCI

[7] Design of environment-sensitive supramolecular assemblies for intracellular drug delivery: Polymeric micelles that are responsive to intracellular pH change [J].

Bae, Y ;

Fukushima, S ;

Harada, A ;

Kataoka, K .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2003, 42 (38) :4640-4643

[8] Carboxy-terminated homo- and copolymers of styrene using dicarboxylic acid functional azo initiator and 2,2,6,6-tetramethyl-1-piperidyloxyl (TEMPO) [J].

Baumert, M ;

Mulhaupt, R .

MACROMOLECULAR RAPID COMMUNICATIONS, 1997, 18 (09) :787-794

[9]

Baumert M, 2000, MACROMOL RAPID COMM, V21, P271, DOI 10.1002/(SICI)1521-3927(20000301)21:6<271::AID-MARC271>3.0.CO

[10]

2-N

← 1 2 3 4 5 6 7 8 9 →