TY - JOUR
T1 - The effect of molar volume on the swelling of poly(dimethylsiloxane) in fluorocarbon fluids
AU - Horkay, Ferenc
AU - Waldron, William K.
AU - McKenna, Gregory B.
N1 - Funding Information:
This work has been supported by the US Air Force Flight Dynamics Laboratory, WPAFB,
PY - 1995
Y1 - 1995
N2 - The vapour sorption of three fluorocarbon fluids (tetrafluoroethane, chlorotetrafluoroethane, and heptafluoropropane) has been measured in crosslinked and uncrosslinked poly(dimethylsiloxane) as a function of the temperature in the interval 35-105°C. For a given solvent, the swelling activity parameter, S, for the solvent/crosslinked polymer system decreases as both the degree of swelling and the temperature increase. The range of experimental conditions examined allowed consideration of S for different solvents, but constant molar volume V1. Plots of S as a function of degree of swelling can be reduced to families of curves at constant V1 for the three solvents studied here. The dependence of S on solvent quality and temperature is then encompassed in its variation with V1.
AB - The vapour sorption of three fluorocarbon fluids (tetrafluoroethane, chlorotetrafluoroethane, and heptafluoropropane) has been measured in crosslinked and uncrosslinked poly(dimethylsiloxane) as a function of the temperature in the interval 35-105°C. For a given solvent, the swelling activity parameter, S, for the solvent/crosslinked polymer system decreases as both the degree of swelling and the temperature increase. The range of experimental conditions examined allowed consideration of S for different solvents, but constant molar volume V1. Plots of S as a function of degree of swelling can be reduced to families of curves at constant V1 for the three solvents studied here. The dependence of S on solvent quality and temperature is then encompassed in its variation with V1.
KW - Frenkel-Flory-Rehner hypothesis
KW - fluorocarbon fluids
KW - poly(dimethylsiloxane)
KW - swelling activity parameter
UR - http://www.scopus.com/inward/record.url?scp=0029103761&partnerID=8YFLogxK
U2 - 10.1016/0032-3861(95)96864-5
DO - 10.1016/0032-3861(95)96864-5
M3 - Article
AN - SCOPUS:0029103761
VL - 36
SP - 4525
EP - 4527
JO - Polymer
JF - Polymer
SN - 0032-3861
IS - 23
ER -