Diblock copolymer surfactant transport across the interface between two homopolymers

Dynamics of adsorption and desorption of a diblock copolymer to an interface between two homopolymers was measured using dynamic secondary-ion mass spectrometry (SIMS). Thin films were constructed consisting of a layer of saturated polybutadiene with 90% 1,2-addition (sPB90), followed by a layer of...

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Veröffentlicht in:Langmuir : the ACS journal of surfaces and colloids. - 1992. - 22(2006), 22 vom: 24. Okt., Seite 9192-200
1. Verfasser: Reynolds, Benedict J (VerfasserIn)
Weitere Verfasser: Ruegg, Megan L, Mates, Thomas E, Radke, C J, Balsara, Nitash P
Format: Aufsatz
Sprache:English
Veröffentlicht: 2006
Zugriff auf das übergeordnete Werk:Langmuir : the ACS journal of surfaces and colloids
Schlagworte:Journal Article Research Support, U.S. Gov't, Non-P.H.S. Polymers Surface-Active Agents
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245 1 0 |a Diblock copolymer surfactant transport across the interface between two homopolymers 
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520 |a Dynamics of adsorption and desorption of a diblock copolymer to an interface between two homopolymers was measured using dynamic secondary-ion mass spectrometry (SIMS). Thin films were constructed consisting of a layer of saturated polybutadiene with 90% 1,2-addition (sPB90), followed by a layer of saturated polybutadiene with 63% 1,2-addition (sPB63), and finally by another layer of the sPB90 homopolymer. A sPB90-sPB63 diblock copolymer was initially included only in the top sPB90 layer of the film at a volume fraction of 0.05. The thin films were annealed at ambient temperature for times ranging between 0.2 and 108 h, and the concentration profiles of the diblock copolymer through the films were measured using SIMS. The dynamics of adsorption and desorption of the diblock copolymer at the two sPB90-sPB63 interfaces was gauged by comparing the different transient concentration profiles. The sorption process was modeled as diffusion in an external field, generated from self-consistent field theory (SCFT). All parameters for the model were determined independently. Although the model neglects the dynamics of conformational change, experimental results matched theory very well 
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650 4 |a Research Support, U.S. Gov't, Non-P.H.S. 
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700 1 |a Ruegg, Megan L  |e verfasserin  |4 aut 
700 1 |a Mates, Thomas E  |e verfasserin  |4 aut 
700 1 |a Radke, C J  |e verfasserin  |4 aut 
700 1 |a Balsara, Nitash P  |e verfasserin  |4 aut 
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