Document Detail


Modifying fragility and collective motion in polymer melts with nanoparticles.
MedLine Citation:
PMID:  21469879     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
We investigate the impact of nanoparticles (NP) on the fragility and cooperative stringlike motion in a model glass-forming polymer melt by molecular dynamics simulation. The NP cause significant changes to both the fragility and the average length of stringlike motion, where the effect depends on the NP-polymer interaction and NP concentration. We interpret these changes via the Adam-Gibbs (AG) theory, assuming the strings can be directly identified with the abstract "cooperatively rearranging regions" of AG. Our findings indicate that fragility is primarily a measure of the temperature dependence of the cooperativity of molecular motion.
Authors:
Francis W Starr; Jack F Douglas
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Publication Detail:
Type:  Journal Article     Date:  2011-03-15
Journal Detail:
Title:  Physical review letters     Volume:  106     ISSN:  1079-7114     ISO Abbreviation:  Phys. Rev. Lett.     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2011-04-07     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401141     Medline TA:  Phys Rev Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  115702     Citation Subset:  IM    
Affiliation:
Department of Physics, Wesleyan University, Middletown, Connecticut 06459, USA.
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