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231223s2008 xx |||||o 00| ||eng c |
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7 |
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|a 10.1021/la800727e
|2 doi
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|a pubmed24n0604.xml
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|a DE-627
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|a eng
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|a Sondjaja, H Ronny
|e verfasserin
|4 aut
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| 245 |
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|a Self-assembly of poly(ethylene oxide)-block-poly(acrylic acid) induced by CaCl2
|b mechanistic study
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|c 2008
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Completed 17.09.2008
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|a Date Revised 13.08.2008
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|a published: Print-Electronic
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|a Citation Status PubMed-not-MEDLINE
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|a The interaction between CaCl 2 and double hydrophilic block copolymer, poly(ethylene oxide) 45- block-poly(acrylic acid) 70, PEO 45- b-PAA 70, was investigated. At a stoichiometric ratio of Ca2+:COO (-) = 0.5, Ca2+ ions were bound to COO (-) groups on PAA segments via electrostatic interaction. Small particles of 4-8 nm in diameter were observed, suggesting the formation of coil-like polymeric globule induced by charge neutralization. At Ca2+:COO (-) >or= 2.5, monodispersed aggregates of average hydrodynamic diameter of 52.0 +/- 7.4 nm were produced. The ISE, ITC, surface tension and fluorescence spectroscopic data confirmed that the formation of these aggregates is not the result of interaction between excess Ca2+ ions and the polymer, but rather it is due to changes in the water activity that triggers the structural rearrangement of Ca2+/PEO 45- b-PAA 70 complex
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|a Journal Article
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|a Hatton, T Alan
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Tam, K C
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 24(2008), 16 vom: 19. Aug., Seite 8501-6
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|x 1520-5827
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| 773 |
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|g volume:24
|g year:2008
|g number:16
|g day:19
|g month:08
|g pages:8501-6
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|u http://dx.doi.org/10.1021/la800727e
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