Temperature-induced ordering and gelation of star micelles based on ABA triblocks synthesized via aqueous RAFT polymerization

被引：16
作者：
Kirkland-York, Stacey [1 ]
Gallow, Keith [2 ]
Ray, Jacob [1 ]
Loo, Yueh-Lin [2 ]
McCormick, Charles [1 ]
机构：
[1] Univ So Mississippi, Dept Polymer Sci, Hattiesburg, MS 39406 USA
[2] Princeton Univ, Dept Chem Engn, Princeton, NJ 08544 USA
来源：
SOFT MATTER | 2009年 / 5卷 / 11期
关键词：
WATER-SOLUBLE (CO)POLYMERS; BLOCK-COPOLYMER; DIBLOCK COPOLYMERS; POLY(ETHYLENE OXIDE); 1,2-BUTYLENE OXIDE; ETHYLENE-OXIDE; GELS; MICELLIZATION; HYDROGELS; DYNAMICS;
D O I：
10.1039/b823131a
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The reversible formation of ordered physical gels from stimuli-responsive ABA [A poly(N,N-dimethylacrylamide) (PDMA), B = poly(N-isopropylacrylamide) (PNIPAM)] triblock copolymers is investigated utilizing dynamic light scattering, small angle X-ray scattering, and low-shear rheometry. As the temperature is increased above the phase transition temperature of the PNIPAM segment, triblock copolymers under a critical molecular weight are capable of packing into body-centered cubic arrays. Rheometric tests indicate that the storage moduli of the gels at 50 degrees C are inversely related to the molecular weight of the polymer.
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收藏
页码：2179 / 2182
页数：4
相关论文
共 37 条
  • [1] POLY(ETHYLENE OXIDE)-POLY(PROPYLENE OXIDE)-POLY(ETHYLENE OXIDE) BLOCK-COPOLYMER SURFACTANTS IN AQUEOUS-SOLUTIONS AND AT INTERFACES - THERMODYNAMICS, STRUCTURE, DYNAMICS, AND MODELING
    ALEXANDRIDIS, P
    HATTON, TA
    [J]. COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS, 1995, 96 (1-2) : 1 - 46
  • [2] Block copolymer assembly to control fluid rheology
    Bhatia, SR
    Mourchid, A
    Joanicot, M
    [J]. CURRENT OPINION IN COLLOID & INTERFACE SCIENCE, 2001, 6 (5-6) : 471 - 478
  • [3] Microstructure and physical properties of a pH-responsive gel based on a novel biocompatible ABA-type triblock copolymer
    Castelletto, V
    Hamley, IW
    Ma, YH
    Bories-Azeau, X
    Armes, SP
    Lewis, AL
    [J]. LANGMUIR, 2004, 20 (10) : 4306 - 4309
  • [4] Direct synthesis of thermally responsive DMA/NIPAM diblock and DMA/NIPAM/DMA triblock copolymers via aqueous, room temperature RAFT polymerization
    Convertine, AJ
    Lokitz, BS
    Vasileva, Y
    Myrick, LJ
    Scales, CW
    Lowe, AB
    McCormick, CL
    [J]. MACROMOLECULES, 2006, 39 (05) : 1724 - 1730
  • [5] Micelles and gels of oxyethylene-oxybutylene diblock copolymers in aqueous solution: The effect of oxyethylene-block length
    Derici, L
    Ledger, S
    Mai, SM
    Booth, C
    Hamley, IW
    Pedersen, JS
    [J]. PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1999, 1 (11) : 2773 - 2785
  • [6] Structure, interactions, and dynamics in tethered chain systems
    Gast, AP
    [J]. LANGMUIR, 1996, 12 (17) : 4060 - 4067
  • [7] pH response of model diblock and triblock copolymer networks containing polystyrene and poly(2-hydroxyethyl methacrylate-co-2-(dimethylamino)ethyl methacrylate)
    Guice, Kyle B.
    Marrou, Stephen R.
    Gondi, Sudershan R.
    Sumerlin, Brent S.
    Loo, Yueh-Lin
    [J]. MACROMOLECULES, 2008, 41 (12) : 4390 - 4397
  • [8] Reversible phase transformations in concentrated aqueous block copolymer solutions of poly(methyl acrylate)-b-poly(hydroxyethyl methacrylate-co-dimethylaminoethyl methacrylate)
    Guice, Kyle B.
    Loo, Yueh-Lin
    [J]. MACROMOLECULES, 2007, 40 (25) : 9053 - 9058
  • [9] Non-linear viscoelastic properties of ordered phases of a poly(ethylene oxide)-poly(propylene oxide) triblock copolymer
    Habas, Jean-Pierre
    Pavie, Emmanuel
    Lapp, Alain
    Peyrelasse, Jean
    [J]. RHEOLOGICA ACTA, 2008, 47 (07) : 765 - 776
  • [10] From hard spheres to soft spheres: The effect of copolymer composition on the structure of micellar cubic phases formed by diblock copolymers in aqueous solution
    Hamley, IW
    Daniel, C
    Mingvanish, W
    Mai, SM
    Booth, C
    Messe, L
    Ryan, AJ
    [J]. LANGMUIR, 2000, 16 (06) : 2508 - 2514
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