Critical micelle lengths for ionic blocks in solutions of polystyrene-b-poly(sodium acrylate) ionomers

Zhong, Xing; Varshney, Sunil K.; Eisenberg, Adi

doi:10.1021/ma00052a014

Cited by 140 publications

(157 citation statements)

References 9 publications

Supporting

Mentioning

154

Contrasting

Order By: Relevance

“…Furthermore, they have also been observed in aqueous systems of lipophilic surfactant in surfactant rich regions 14,15 . Only few reports exist that describes the formation of reverse micelles in organic solvents without water addition [16][17][18][19][20] .…”

Section: Introductionmentioning

confidence: 99%

Structure of Diglycerol Polyisostearate Nonionic Surfactant Micelles in Nonpolar Oil Hexadecane: A SAXS Study

Shrestha

Oyama

et al. 2010

J. Oleo Sci.

View full text Add to dashboard Cite

Using a small-angle X-ray scattering technique, shape and size, and internal structure of diglycerol polyisostearate nonionic surfactant micelles in nonpolar oil n-hexadecane (HD) were investigated at 25 . Furthermore, the effect of added water on the structure of host reverse micelles was also investigated. The scattering data were evaluated by the generalized indirect Fourier transformation (GIFT) method and model fi ttings. It was found that diglycerol polyisostearate (abbreviated as (iso-C 18 ) n G 2 , where n = 2-4 represent the number of isostearate chain per surfactant molecule) spontaneously form reverse micelles in HD at 25 and their geometry (shape and size, and internal structure) could fl exibly be controlled by a small change in the lipophilic tail architecture of the surfactant, temperature, and water addition. Increasing number of isostearate chain per surfactant molecule decreases the micelles size favoring prolate-to-sphere type transition. This phenomenon could be best understood due to voluminous lipophilic part of the surfactant. Increasing temperature decreases the size of the reverse micelles due to enhanced interpenetration of the surfactant chain and the oil and also due to dominant hydrophobic character of the surfactant at higher temperatures. In the studies of effect of added water on the structure of micelles, it was found that the reverse micelles swell with water causing two dimensional micellar growths.

show abstract

Section: Introductionmentioning

confidence: 99%

Structure of Diglycerol Polyisostearate Nonionic Surfactant Micelles in Nonpolar Oil Hexadecane: A SAXS Study

Shrestha

Oyama

et al. 2010

J. Oleo Sci.

View full text Add to dashboard Cite

show abstract

“…Based on their unique structures and properties, polypeptides and their copolymers have been investigated widely in the fields of functional biomaterials, protein simulation, polymer carriers for protein conjugates, macromolecular conformational study, catalysis, nanoreactors, drug delivery systems etc [9][10][11][12][13] . Also, for polypeptide films, an important application is for temporary artificial skin substrates in burn therapy [1,3] .…”

Section: Introductionmentioning

confidence: 99%

Modification of hydrophobic polypeptide-based film by blending with hydrophilic poly(acrylic acid)

et al. 2013

View full text Add to dashboard Cite

Abstract:In this study, a series of poly(γ-benzyl L-glutamate)/poly(acrylic acid) (PBLG/PAA) polymer blend films were prepared by casting the polymer blend solution in dimethylsulfoxide (DMSO). The structure and morphology of the polymer blend film were investigated by Fourier Transform Infrared Spectroscopy (FT-IR) and Scanning Electron Microscopy (SEM). Thermal, mechanical, and chemical properties of PBLG/PAA polymer blend films were studied by Differential Scanning Calorimetry (DSC), Thermogravimetric (TG) Analysis, Tensile Tests, and measurements of Surface Contact Angles. The results revealed that the introduction of PAA could exert great effects on the structure and properties of the polypeptide films.

show abstract

“…[1][2][3][4][5][6][7][8][9][10][11][12] Because of the unique structures and properties, synthesized polypeptides and their copolymers have been investigated widely in the fields of protein simulation, macromolecular conformational study, catalysis, drug delivery, nanoreactors etc. [13][14][15][16][17][18][19][20][21][22][23] Recently, much interest has been focused on the self-association behavior of the copolymers composed of hydrophobic polypeptide segments and hydrophilic polymer chains.…”

Section: Introductionmentioning

confidence: 99%

Effects of reaction conditions on the grafting percentage of poly(ethylene glycol)-block-poly(γ-benzyl L-glutamate)-graft-poly(ethylene glycol) copolymer

Zhu

Wang

Liu

2010

J. Braz. Chem. Soc.

View full text Add to dashboard Cite

a cadeia PEG. A estrutura e propriedades do copolímero PEG-b-PBLG-g-PEG foram investigadas por spetroscopia no infravermelho (FT-IR), microscopia de força atômica (AFM), microscopia eletrônica de varredura (SEM) e calorimetria diferencial de varredura (DSC). Foram investigados os efeitos de temperatura de reação, tempo de reação, e extensão da cadeia dos segmentos PBLG na porcentagem de enxerto do copolímero PEG-b-PBLGg-PEG. Os resultados experimentais demonstraram que a porcentagem de enxerto do copolímero PEG-b-PBLG-g-PEG aumentarou com o aumento do tempo e temperatura de reação, enquanto que o aumento do comprimento da cadeia de segmentos PBLG no copolímero bloco diminuiu a porcentagem de enxerto.In the present work, poly(ethylene glycol)-block-poly(γ-benzyl L-glutamate)-graftpoly(ethylene glycol) (PEG-b-PBLG-g-PEG) copolymer was synthesized by the ester exchange reaction of PEG-block-PBLG copolymer with PEG chain. Structure and properties of PEG-b-PBLG-g-PEG copolymer were investigated by fourier transform infrared spectroscopy (FT-IR), atomic force microscopy (AFM), scanning electron microscopy (SEM), and differential scanning calorimeter (DSC). The effects of reaction temperature, reaction time, and the chain length of PBLG segments on the grafting percentage of PEG-b-PBLG-g-PEG copolymer were studied. Experimental results demonstrated that the grafting percentage of PEG-b-PBLG-g-PEG copolymer increased with the increase of both reaction temperature and reaction time, while the increase of the chain length of PBLG segments in block copolymer decreased the grafting percentage.

show abstract

Critical micelle lengths for ionic blocks in solutions of polystyrene-b-poly(sodium acrylate) ionomers

Cited by 140 publications

References 9 publications

Structure of Diglycerol Polyisostearate Nonionic Surfactant Micelles in Nonpolar Oil Hexadecane: A SAXS Study

Structure of Diglycerol Polyisostearate Nonionic Surfactant Micelles in Nonpolar Oil Hexadecane: A SAXS Study

Modification of hydrophobic polypeptide-based film by blending with hydrophilic poly(acrylic acid)

Effects of reaction conditions on the grafting percentage of poly(ethylene glycol)-block-poly(γ-benzyl L-glutamate)-graft-poly(ethylene glycol) copolymer

Contact Info

Product

Resources

About