Solvent-Facilitated Homopolymer Sorption in Swollen Block Copolymer Matrices

Homopolymer sorption in microphase-ordered block copolymers can provide insight into the factors governing transport of chain molecules in dense nanostructured environments, as well as yield novel nonequilibrium materials. Here, we examine the sorption of homopolymer B (hB) in ABA triblock copolymer...

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Bibliographic Details
Published in:Macromolecules 2003-05, Vol.36 (9), p.3206-3209
Main Authors: Stevens, Joy E, Thongruang, Wiriya, Patel, Nikunj P, Smith, Steven D, Spontak, Richard J
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
Miscellaneous
Organic polymers
Physicochemistry of polymers
Properties and characterization
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Summary:Homopolymer sorption in microphase-ordered block copolymers can provide insight into the factors governing transport of chain molecules in dense nanostructured environments, as well as yield novel nonequilibrium materials. Here, we examine the sorption of homopolymer B (hB) in ABA triblock copolymers swollen in a B-selective solvent. Gravimetric analysis reveals that the solubility of hB (S hB) varies linearly with solution concentration (C) and that (∂S hB/∂C) T depends on the molecular weight of the B midblock (M B). These data also show that the effective diffusion coefficient of hB is ∼10-8 cm2/s, independent of M B.
ISSN:0024-9297
1520-5835
DOI:10.1021/ma0215868