Dowtherm A, Thermal Expansion Coefficient?
Dowtherm A, Thermal Expansion Coefficient?
(OP)
Does anyone have the thermal expansion coefficient for Dowtherm A? I will need to size a PSV for thermal expansion. I need it at about 315 C and 260 C.
Thanks
Thanks





RE: Dowtherm A, Thermal Expansion Coefficient?
RE: Dowtherm A, Thermal Expansion Coefficient?
RE: Dowtherm A, Thermal Expansion Coefficient?
RE: Dowtherm A, Thermal Expansion Coefficient?
Thanks, I guess sometimes, I've forgotten more than I know. Here's how to work it out:
alpha = 1/V (dV/dT) solving for the integral:
Integral(alpha dT) = Integral (dV/V)
Solving for T1, T2, V1, V2:
alpha = ln(V2/V1)/(T2-T1)
Where to get Vs:
Assume a 1 lbs. basis: V = W(1 lbs.)/density @ T
Substitute V2, V1 for T1, T2 and solve for thermal expansion over the interval.
Reference: http://en.wikipedia.org/wiki/Thermal_expansion
Thanks,
RE: Dowtherm A, Thermal Expansion Coefficient?
Dow also has a booklet on Dowtherm A.
http://www.therminol.com/pages/tools/toolscd.asp