Amphiphilic Block Copolymers as Surfactants in Emulsion Polymerization

Gerst, Matthias; Schuch, Horst; Urban, Dieter

doi:10.1021/bk-2000-0765.ch003

Cited by 12 publications

(6 citation statements)

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“…Among the general overviews previously indicated, one has to mention those concerning block copolymer applications as emulsifiers [1,361], as stabilizer in latex technology [1,5,12,362], as compatibilizers in polymer blends [1,10] and as active component in separation processes [363]. In addition, several recent reviews as those of Holmberg [364] and of Edens [365].…”

Section: Miscellaneous Applicationsmentioning

confidence: 99%

Micellization of block copolymers

Riess¹

2003

Progress in Polymer Science

1,869

1,787

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This article deals with recent progress including the author's work in the field of block copolymer self-assembly in solution and on solid surfaces. The synthesis methods for producing block copolymers with well-defined structures, molecular weights and composition are outlined with emphasis on ionic and controlled free radical polymerization techniques. A general overview of the preparation, characterization and theories of block copolymer micellar systems is presented. Selected examples of micelle formation in aqueous and organic medium are given for di-and triblock copolymers, as well as for block copolymers with more complex architectures. Current and potential application possibilities of block copolymer colloidal assemblies as stabilizers, flocculants, nanoreservoir in, among others, controlled delivery of bioactive agents, catalysis, latex agglomeration and stabilization of non-aqueous emulsion are also discussed.

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Section: Miscellaneous Applicationsmentioning

confidence: 99%

Micellization of block copolymers

Riess¹

2003

Progress in Polymer Science

1,869

1,787

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“…A large number of parameters such as temperature, solvent quality, concentration, pH, copolymer structure, molecular weight and composition may affect the aggregation behavior, leading to a wide variety of micellar morphologies (spheres, cylinders, vesicles, lamellae, etc.). 3,4 Because of their stability, variety of size, and core-shell structure, micelles can be used in a diverse range of practical applications, such as colloidal stabilization, 5 latex technology, 6 compatibilization in polymer blends, 7 viscosity, and surface modification, 8 in environmental science enhancing the solubility of water-insoluble compounds (water purification), 9 and so on. However, polymeric micelles have been valuable and studied extensively because of their applications in medicine, mainly as drug delivery vehicles.…”

Section: Introductionmentioning

confidence: 99%

Poly(dl-lactide)-b-poly(N,N-dimethylamino-2-ethyl methacrylate): Synthesis, Characterization, Micellization Behavior in Aqueous Solutions, and Encapsulation of the Hydrophobic Drug Dipyridamole

et al. 2009

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We synthesized a series of well-defined poly(dl-lactide)-b-poly(N,N-dimethylamino-2-ethyl methacrylate) (PDLLA-b-PDMAEMA) amphiphilic diblock copolymers by employing a three-step procedure: (a) ring-opening polymerization (ROP) of dl-lactide using n-decanol and stannous octoate, Sn(Oct)(2), as the initiating system, (b) reaction of the PDLLA hydroxyl end groups with bromoisobutyryl bromide, and (c) atom transfer radical polymerization, ATRP, of DMAEMA with the newly created bromoisobutyryl initiating site. The aggregation behavior of the prepared block copolymers was investigated by dynamic light scattering and zeta potential measurements at 25 degrees C in aqueous solutions of different pH values. The hydrophobic drug dipyridamole was efficiently incorporated into the copolymer aggregates in aqueous solutions of pH 7.40. High partition coefficient values were determined by fluorescence spectroscopy.

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“…From a morphological point of view, block copolymer micelles consist of a more or less swollen core of the insoluble blocks surrounded by a corona formed by the soluble blocks. Because of their stability, variety of sizes, and core−shell structure, micelles can be used in a diverse field of practical applications, such as colloidal stabilization, latex technology, compatibilization in polymer blends, controlled drug delivery, water purification, viscosity and surface modification, etc.…”

Section: Introductionmentioning

confidence: 99%

Micellization Behavior of Complex Comblike Block Copolymer Architectures

et al. 2007

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Complex comblike block copolymers of various architectures containing polystyrene, PS, and polyisoprene, PI, or polybutadiene, PB, components were synthesized by anionic polymerization high-vacuum techniques and the macromonomer strategy. Their micellization behavior was studied in n-decane, a selective solvent for the PI or PB blocks, and in N,N′-dimethylacetamide, DMA, selective for the PS blocks. Utilizing static and dynamic light scattering techniques, parameters such as the aggregation number and the hydrodynamic radius were determined. On the basis of these results, structural parameters of the micelles, i.e., core and corona radii as well as core-corona interfacial area, were calculated. The thermal stability of the micelles was also examined in both selective solvents. The macromolecular architecture was found to have a considerable effect on the micellization behavior of the block copolymers.

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Amphiphilic Block Copolymers as Surfactants in Emulsion Polymerization

Cited by 12 publications

References 0 publications

Micellization of block copolymers

Micellization of block copolymers

Poly(dl-lactide)-b-poly(N,N-dimethylamino-2-ethyl methacrylate): Synthesis, Characterization, Micellization Behavior in Aqueous Solutions, and Encapsulation of the Hydrophobic Drug Dipyridamole

Micellization Behavior of Complex Comblike Block Copolymer Architectures

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