Accession Number : AD1022977


Title :   Seeded Reaction Waves in Composites: Fast Structure Transforming Materials that Respond to Energetic Stimuli


Descriptive Note : Technical Report,01 Aug 2013,31 Jul 2016


Corporate Author : University of Illinois at Urbana-Champaign Champaign United States


Personal Author(s) : Moore, Jeff ; Braun,Paul ; Sottos,Nancy ; White,Scott ; Sun,Pengcheng ; Liu,Jinyun ; Sekerak,Nina ; Hutchins,Kristin ; Li,Jun ; Robertson,Ian


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/1022977.pdf


Report Date : 21 Oct 2016


Pagination or Media Count : 41


Abstract : Damage in polymer and composite materials is often rapid and catastrophic. Preventing damage requires a new class of material that can autonomically respond to imminent damage by rapidly changing its physical properties. Herein we report several mechanisms by which autonomic material self-protection may be realized. The incorporation of encapsulated super cooled fluids into a polymer matrix allows for rapid changes in mechanical properties. Frontal polymerization within a microvascular network rapidly forms an endoskeletal structure within a flexible rubber, stiffening it up to 18x. Polymer seed particles have also been developed towards enabling a seeded frontal polymerization. Mechanochemical activity at interface


Descriptors :   composite materials , mechanical properties , materials processing , copolymers , phase transformations , absorption spectra , dielectric polymers , modulus of elasticity , molecular weight , polymerization , alkenes


Distribution Statement : APPROVED FOR PUBLIC RELEASE