TY - GEN
T1 - Effects of free surface and substrate interactions on the distribution of glass transition temperatures in nanoconfined polymers
AU - Deng, Hui
AU - Torkelson, John M.
PY - 2009
Y1 - 2009
N2 - A fluorescence/multilayer technique was used to determine the distribution of glass transition temperatures (Tgs) in nanoconfined poly(methyl methacrylate) films. Poly(methyl methacrylate) exhibits an attraction to silica, shown by an increase in Tg near the substrate. Perturbations in dynamics associated with Tg near a free surface lead to a T g decrease. Both effects are shown to penetrate some tens of nanometers into a nanoconfined film. Effects of nanoconfinement on the transition between free-surface, bulk, and substrate Tg are explored, with potential application to nanocomposite behavior.
AB - A fluorescence/multilayer technique was used to determine the distribution of glass transition temperatures (Tgs) in nanoconfined poly(methyl methacrylate) films. Poly(methyl methacrylate) exhibits an attraction to silica, shown by an increase in Tg near the substrate. Perturbations in dynamics associated with Tg near a free surface lead to a T g decrease. Both effects are shown to penetrate some tens of nanometers into a nanoconfined film. Effects of nanoconfinement on the transition between free-surface, bulk, and substrate Tg are explored, with potential application to nanocomposite behavior.
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M3 - Conference contribution
AN - SCOPUS:70449854583
SN - 9781615673278
T3 - Annual Technical Conference - ANTEC, Conference Proceedings
SP - 801
EP - 804
BT - 67th Annual Technical Conference of the Society of Plastics Engineers 2009, ANTEC 2009
T2 - 67th Annual Technical Conference of the Society of Plastics Engineers 2009, ANTEC 2009
Y2 - 22 June 2009 through 24 June 2009
ER -