Accession Number : ADA591309


Title :   Mechanochemically-Active Polymer Composites


Descriptive Note : Final rept. 15 Jun 2007-14 Jun 2013


Corporate Author : ILLINOIS UNIV AT URBANA-CHAMPAIGN


Personal Author(s) : Moore, J S ; Braun, P ; Bielawski, C ; Craig, S ; Martinez, T ; Sottos, N


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a591309.pdf


Report Date : 13 Sep 2013


Pagination or Media Count : 27


Abstract : Progress during the prior funding period includes understanding of fracture-induced mechanophore activation, development of a new computational model for predicting mechanochemical phenomena, and the development of new analytical techniques to study mechanochemistry. These studies are making it possible to compare the theoretical and experimental threshold forces that induce mechanochemistry. Other mechanophore advances include a detailed structure-activity relationship for a series of cyclobutane mechanophores and force-induced Diels-Alder cycloreversions. Experimental methods have been developed to characterize the mechanisms of macroscopic force transfer from a bulk solid polymer to linked mechanophores based on studies that address mechanochemical activation under tensile loading, shear, and fracture behavior.


Descriptors :   *CHEMICAL REACTIONS , *COMPOSITE MATERIALS , *MECHANICAL PROPERTIES , *POLYMERS , CYCLOBUTANES , DEFORMATION , ELASTOMERS , FRACTURE(MECHANICS) , LOADS(FORCES) , MATHEMATICAL MODELS , RELAXATION , THRESHOLD EFFECTS


Subject Categories : Physical Chemistry
      Polymer Chemistry
      Laminates and Composite Materials
      Plastics
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE