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Glass-rubber transition, poly film

Gladfelter and co-workers probed polymer viscoelastic relaxations with temperature-controlled FFM (272,273). The dependence of the mean value of the friction force on temperature was reported to be correlated to the glass-to-rubber transition and/or secondary relaxation mechanisms in films of PMMA, poly(ethylene terephthalate) (PET), and PS. Viscoelastic mechanical losses were thought to be the dominant contribution to friction, which were found to obey the time-temperature superposition principle. Interestingly, the surface Tg s and values for the activation energy measured for the /3-relaxation at the surface were lower than those of the bulk material. [Pg.7476]

See other pages where Glass-rubber transition, poly film is mentioned: [Pg.404]    [Pg.114]    [Pg.346]    [Pg.111]    [Pg.116]    [Pg.220]    [Pg.452]    [Pg.115]    [Pg.341]    [Pg.108]    [Pg.116]    [Pg.81]    [Pg.238]    [Pg.321]    [Pg.212]    [Pg.93]    [Pg.238]    [Pg.601]    [Pg.234]    [Pg.233]    [Pg.217]    [Pg.667]    [Pg.151]    [Pg.238]    [Pg.45]    [Pg.601]    [Pg.44]   
See also in sourсe #XX -- [ Pg.219 , Pg.220 ]



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Glass films

Glass-rubber

Poly , glass

Poly films

Poly rubbers

Poly transition

Rubber transition

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