Relaxation Modulus Ert: Time and Temp Dependence

1
Relaxation Modulus Er(t) Time and Temp Dependence
Lowest T T ltlt Tg
Glassy
Leathery
Rubbery plateau
Rubbery flow
Highest T T gt Tg
Viscous Flow (liquid)
Log time
Tm
temp
Tg

• Decrease Er (t) with increase temp.
• Significant decrease of Er (t) at T ? Tg and Tm

• Decrease Er (t) with increase time