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231223s2009 xx |||||o 00| ||eng c |
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|a 10.1021/la901239v
|2 doi
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|a pubmed24n0637.xml
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|a DE-627
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|c DE-627
|e rakwb
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|a eng
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| 100 |
1 |
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|a Yu, Jinxiang
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Phase separation at the surface of poly(ethylene oxide)-containing biodegradable poly(L-lactic acid) blends
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|c 2009
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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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|a Date Completed 03.12.2009
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|a Date Revised 20.10.2021
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|a published: Print
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|a Citation Status MEDLINE
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|a The surface chemistry and in-depth distribution of the composition of a poly(ethylene oxide) (PEO)-containing biodegradable poly(L-lactic acid) (PLLA) blend matrix system have been investigated using X-ray photoelectron spectroscopy (XPS). This study reports detailed quantitative compositional information using a novel numerical method for determining depth profiles. The PEO system studied is an amphiphilic Pluronic P104 surfactant, PEO-b-poly(propylene oxide) (PPO)-b-PEO. The extent of phase separation is analyzed by determining the surface enrichment of the PEO component via measurement of chemical composition at the polymer-air interface. For this blend system, the combination of the PPO component in the Pluronic surfactants drives the formation of a surface excess of Pluronic in the blends with PLLA. The surface excess profile shows a rapid increase in Pluronic surface composition versus bulk Pluronic mass fractions of 1-5%, but the profile levels off above bulk Pluronic mass fractions of 5%
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|a Journal Article
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|a Polyesters
|2 NLM
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|a Polymers
|2 NLM
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|a Lactic Acid
|2 NLM
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|a 33X04XA5AT
|2 NLM
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|a Polyethylene Glycols
|2 NLM
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|a 3WJQ0SDW1A
|2 NLM
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|a poly(lactide)
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|a Mahoney, Christine M
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|a Fahey, Albert J
|e verfasserin
|4 aut
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|a Hicks, Wesley L
|c Jr
|e verfasserin
|4 aut
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| 700 |
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|a Hard, Robert
|e verfasserin
|4 aut
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| 700 |
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|a Bright, Frank V
|e verfasserin
|4 aut
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| 700 |
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|a Gardella, Joseph A
|c Jr
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 25(2009), 19 vom: 06. Okt., Seite 11467-71
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|x 1520-5827
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|g volume:25
|g year:2009
|g number:19
|g day:06
|g month:10
|g pages:11467-71
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|3 Volltext
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