Accession Number : ADA528698


Title :   Symposium II: Mechanochemistry in Materials Science, MRS Fall Meeting, Nov 30-Dec 4, 2009, Boston, MA


Descriptive Note : Final rept. 15 Oct 2009-30 Apr 2010


Corporate Author : MATERIALS RESEARCH SOCIETY WARRENDALE PA


Personal Author(s) : Craig, Stephen ; Scherge, Matthias ; Sottos, Nancy


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a528698.pdf


Report Date : 02 Sep 2010


Pagination or Media Count : 18


Abstract : Damage-prone regions at surfaces and in polymeric and composite materials are difficult to detect and even harder to mitigate. Damage is preceded by complex spatial and temporal changes in stress state, and it is therefore desirable to utilize those changes in stress state to mechanically activate - without human intervention - chemical changes that favorably alter materials properties where and when they are needed. Desirable materials properties brought about in response to high-stress conditions include: (1) signal generation to warn of ensuing failure, (2) molecular structure modification to slow the rate of damage and extend lifetime (e.g., stress-induced crosslinking), and (3) repair of damage in early stages to avoid catastrophic failure. In addition, the stress fields associated with particular material uses might be productively channeled to create new molecular processes (chemical reactions) that are otherwise impossible.


Descriptors :   *MATERIALS , *COMPOSITE MATERIALS , *CHEMICAL REACTIONS , *POLYMERS , CHEMICALS , MODIFICATION , MOLECULES , REPAIR , RESPONSE , MOLECULAR STRUCTURE , CATASTROPHIC CONDITIONS , DAMAGE , SYMPOSIA , SIGNAL GENERATION , STRESSES , SPATIAL DISTRIBUTION


Subject Categories : Physical Chemistry
      Polymer Chemistry
      Laminates and Composite Materials


Distribution Statement : APPROVED FOR PUBLIC RELEASE