Accession Number : ADA616610


Title :   A Facile Synthesis of Dynamic, Shape-Changing Polymer Particles


Descriptive Note : Journal article


Corporate Author : CALIFORNIA UNIV SANTA BARBARA


Personal Author(s) : Klinger, Daniel ; Wang, Cynthia X ; Connal, Luke A ; Audus, Debra J ; Jang, Se G ; Kraemer, Stephan ; Killops, Kato L ; Fredrickson, Glenn H ; Kramer, Edward J ; Hawker, Craig J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a616610.pdf


Report Date : 02 Apr 2014


Pagination or Media Count : 8


Abstract : We herein report a new facile strategy to ellipsoidal block copolymer nanoparticles that exhibit a pH-triggered anistropic swelling profile. In a first step, elongated particles with an axially stacked lamellae structure are selectively prepared by utilizing functional surfactants to control the phase separation of symmetric polystyrene-b-poly(2-vinylpyridine) (PS-b-P2VP) in dispersed droplets. In a second step, the dynamic shape change is realized by cross-linking the P2VP domains, thereby connecting glassy PS discs with pH-sensitive hydrogel actuators.


Descriptors :   *BLOCK COPOLYMERS , *NANOPARTICLES , *SURFACE CHEMISTRY , ANISOTROPY , CHEMICAL ENGINEERING , CROSSLINKING(CHEMISTRY) , GELS , LITHOGRAPHY , MOLECULAR WEIGHT , MORPHOLOGY , PH FACTOR , SELF ASSEMBLED MONOLAYERS , SEPARATION , SOLUTIONS(MIXTURES) , STIMULI , SURFACE ACTIVE SUBSTANCES , SYNTHESIS(CHEMISTRY)


Subject Categories : Polymer Chemistry


Distribution Statement : APPROVED FOR PUBLIC RELEASE