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Influence of Confinement on the Fragility of Antiplasticized and Pure Polymer Films



Robert A. Riggleman, K Yoshimoto, Jack F. Douglas, J J. de Pablo


We investigate by molecular dynamics simulation how thin film confinementmodifies the fragility of a model glass-forming liquid characterized previously in the bulk. Film confinement is found to reduce the relative fragility of the polymer fluid, leading to effects similar to simulationsof the addition of an antiplasticizer additive. A reduction of fragility is not observed for the antiplasticized polymer film. These effects are interpreted in terms of variation in the string (cooperatively moving segments) concentration with film confinement and the addition of antiplasticizing additives.
Physical Review Letters


antiplasticer additives, entropy theory of glass-formation, film confinement, fragiity, glass transition, polymer melt


Riggleman, R. , Yoshimoto, K. , Douglas, J. and de Pablo, J. (2006), Influence of Confinement on the Fragility of Antiplasticized and Pure Polymer Films, Physical Review Letters, [online], (Accessed June 25, 2024)


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Created July 26, 2006, Updated October 12, 2021