Cyclic and Multiblock Polystyrene-block-polyisoprene Copolymers by Combining Anionic Polymerization and Azide/Alkyne "Click" Chemistry

被引：71

作者：

Touris, Athanasios ^{[1
]}

Hadjichristidis, Nikos ^{[1
]}

机构：

[1] Univ Athens, Dept Chem, GR-15771 Athens, Greece

来源：

MACROMOLECULES | 2011年 / 44卷 / 07期

关键词：

TRANSFER RADICAL POLYMERIZATION; RING-OPENING POLYMERIZATION; SHAPED SIDE-CHAINS; MICROPHASE SEPARATION; CLOSING METATHESIS; POLYMERS; COMBINATION; CYCLIZATION; BEHAVIOR; STYRENE;

D O I：

10.1021/ma102900d

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

An alpha,omega-heterotelechelic block copolymer of polystyrene (PS) and polyisoprene (P1), alpha-acetylene-omega-azido-PS-b-PI, with M-n = 18 900 and PDI = 1.05, was synthesized by (a) sequential anionic polymerization of styrene and isoprene with S-triethylsilyI-4-pentynyllithium (TESPLi) as initiator to afford alpha-(TES-acetylene)-omega-lithium-PS-b-PI, (b) reaction of the living heterofunctionalized copolymer with 1,4-dibromobutane and sodium azide to give alpha-(TES-acetylene)-omega-azido-PS-b-PI, and (c) deprotection of the acetylene group to afford the final product alpha-acetylene-omega-azido-PS-b-PI. This alpha,omega-heterotelechelic block copolymer with "clickable" groups, in the presence of CuBr and N,N,N',N '',N ''-pentamethyldiethylenetriamine, led to cyclic block copolymer in dilute solution (lower than the equilibrium concentration < 6 x 10(-5) g/ml,), whereas in concentrated solutions (5.3 x 10(-2) g/mL) gave multiblock copolymers.

引用

页码：1969 / 1976

页数：8

共 48 条

[11]

Hadjichristidis N, 2000, J POLYM SCI POL CHEM, V38, P3211, DOI 10.1002/1099-0518(20000915)38:18<3211::AID-POLA10>3.3.CO

[12]

2-C

[13]

HADJICHRISTIDIS N, 2003, J BLOCK COPOLYMERS S

[14] Cyclic Azobenzene-Containing Side-Chain Liquid Crystalline Polymers: Synthesis and Topological Effect on Mesophase Transition, Order, and Photoinduced Birefringence [J].