Accession Number : ADA608975


Title :   Metastable Packaging For Transient Electronics


Descriptive Note : Final rept. 9 Jul 2013-25 Apr 2014


Corporate Author : ILLINOIS UNIV AT URBANA-CHAMPAIGN


Personal Author(s) : Moore, Jeffrey S ; White, Scott R ; Sottos, Nancy R ; Rogers, John A ; Inci, Bora ; Kaitz, Joshua A ; Kang, Seung-Kyun ; Lee, Olivia P ; Lopez Hernandez, Hector ; Park, Chan W


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA608975


Report Date : Sep 2014


Pagination or Media Count : 36


Abstract : Metastable polymeric materials were synthesized, formulated with additives and microcapsules, and then processed into films that served as substrates on which electronic devices were fabricated. New to this effort was the intentional development of depackaging cascades -- the rational design of materials that depolymerize on exposure to specific stimuli. In particular, we investigated acid-sensitive, depolymerizable poly(phthalaldehyde) (PPA), and thermally- and base-sensitive poly(olefin sulfone) (POS) polymers. Conditions for film preparation and fabrication of transient electronics on robust PPA and POS films were optimized. Three degradation triggers -- direct activation by photoacid generation, thermal activation, and mechanical rupture of acid-filled microcapsules -- were investigated.


Descriptors :   *METASTABLE STATE , *PACKAGING , *POLYMERS , *SYNTHESIS(CHEMISTRY) , ACIDS , ACTIVATION , ADDITIVES , DEGRADATION , DEPOLYMERIZATION , DIFFUSION , ELECTRONICS , FABRICATION , MECHANICAL PROPERTIES , POLYMERIC FILMS , SUBSTRATES , TEMPERATURE , THERMAL PROPERTIES


Subject Categories : Physical Chemistry
      Polymer Chemistry
      Containers and Packaging


Distribution Statement : APPROVED FOR PUBLIC RELEASE