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Fabrication of Reversibly Crosslinkable, 3‐Dimensionally Conformal Polymeric Microstructures
Author(s) -
Connal Luke A.,
Vestberg Robert,
Hawker Craig J.,
Qiao Greg G.
Publication year - 2008
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.200800333
Subject(s) - materials science , polymer , fabrication , acrylate , microstructure , porosity , lithography , chemical engineering , nanotechnology , honeycomb , polymer chemistry , copolymer , composite material , optoelectronics , medicine , alternative medicine , pathology , engineering
Multifaceted porous materials were prepared through careful design of star polymer functionality and properties. Functionalized core crosslinked star (CCS) polymers with a low glass transition temperature ( T g ) based on poly(methyl acrylate) were prepared having a multitude of hydroxyl groups at the chain ends. Modification of these chain ends with 9‐anthracene carbonyl chloride introduces the ability to reversibly photocrosslink these systems after the star polymers were self‐assembled by the breath figure technique to create porous, micro‐structured films. The properties of the low T g CCS polymer allow for the formation of porous films on non‐planar substrates without cracking and photo‐crosslinking allows the creation of stabilized honeycomb films while also permitting a secondary level of patterning on the film, using photo‐lithographic techniques. These multifaceted porous polymer films represent a new generation of well‐defined, 3D microstructures.