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Volume Contractions Induced by Crosslinking: A Novel Route to Nanoporous Polymer Films
Author(s) -
Jeong U.,
Ryu D.Y.,
Kim J.K.,
Kim D.H.,
Russell T.P.,
Hawker C.J.
Publication year - 2003
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200304401
Subject(s) - materials science , nanoporous , polymer , volume (thermodynamics) , polymer science , nanotechnology , chemical engineering , composite material , physics , quantum mechanics , engineering
Thin films of polystyrene‐ block ‐poly(methyl methacrylate) (PS‐ b ‐PMMA) are prepared in which the cylindrical PMMA microdomains are oriented normal to the substrate. When the PS block is crosslinked, pores with tailored diameters ranging from 3 nm to ∼ 8 nm, are generated at the center of PMMA microdomains (see Figure). The distance between the pores and their lateral distribution reflects that of the initial copolymer template.