Ultra-thin polymer films: Elastic response in the rubbery regime

Paul A. O'Connell, Gregory B. McKenna

Research output: Contribution to conferencePaperpeer-review

Abstract

Using a novel microbubble inflation technique developed within our laboratory, we are able to measure the absolute biaxial compliance of polymer films as thin as 13 nm. Experiments performed on both poly(vinyl acetate) (PVAc) and polystyrene (PS) films show that large reductions in the glass transition temperature at the nano-scale are nonuniversal, viz., the PVAc shows no reduction even for the thinnest films while the PS shows a significant reduction at a thickness below approximately 80 nm. More surprisingly, the rubbery plateau region for both materials shows dramatic stiffening (>300 times), perhaps due to surface pinning of the entanglement network. The compliance increases as approximately the square of film thickness.

Original languageEnglish
Pages1494-1496
Number of pages3
StatePublished - 2006
EventSociety of Plastics Engineers Annual Technical Conference 2006, ANTEC 2006 - Charlotte, NC, United States
Duration: May 7 2006May 11 2006

Conference

ConferenceSociety of Plastics Engineers Annual Technical Conference 2006, ANTEC 2006
CountryUnited States
CityCharlotte, NC
Period05/7/0605/11/06

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