Document Detail

Life extension of self-healing polymers with rapidly growing fatigue cracks.
MedLine Citation:
PMID:  17251129     Owner:  NLM     Status:  MEDLINE    
Self-healing polymers, based on microencapsulated dicyclopentadiene and Grubbs' catalyst embedded in the polymer matrix, are capable of responding to propagating fatigue cracks by autonomic processes that lead to higher endurance limits and life extension, or even the complete arrest of the crack growth. The amount of fatigue-life extension depends on the relative magnitude of the mechanical kinetics of crack propagation and the chemical kinetics of healing. As the healing kinetics are accelerated, greater fatigue life extension is achieved. The use of wax-protected, recrystallized Grubbs' catalyst leads to a fourfold increase in the rate of polymerization of bulk dicyclopentadiene and extends the fatigue life of a polymer specimen over 30 times longer than a comparable non-healing specimen. The fatigue life of polymers under extremely fast fatigue crack growth can be extended through the incorporation of periodic rest periods, effectively training the self-healing polymeric material to achieve higher endurance limits.
A S Jones; J D Rule; J S Moore; N R Sottos; S R White
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Publication Detail:
Type:  Journal Article; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Journal of the Royal Society, Interface / the Royal Society     Volume:  4     ISSN:  1742-5689     ISO Abbreviation:  J R Soc Interface     Publication Date:  2007 Apr 
Date Detail:
Created Date:  2007-04-18     Completed Date:  2007-10-18     Revised Date:  2009-11-18    
Medline Journal Info:
Nlm Unique ID:  101217269     Medline TA:  J R Soc Interface     Country:  England    
Other Details:
Languages:  eng     Pagination:  395-403     Citation Subset:  IM    
Beckman Institute, University of Illinois, Urbana, IL 61801, USA.
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MeSH Terms
Biocompatible Materials / chemistry*
Compressive Strength
Indenes / chemistry*
Materials Testing*
Polymers / chemistry*
Stress, Mechanical
Reg. No./Substance:
0/Biocompatible Materials; 0/Indenes; 0/Polymers; 77-73-6/dicyclopentadiene

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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