Low temperature DSC was used to study the state of several solv
ents in poly(dimethyl siloxane) (PDMS) membrane and the influ
ence on the sorbed solv
ents on PDMS crystallinity. No phase transition was detected on the DSC thermograms until −130°C, wh
en the solv
ent cont
ent in polymer is low, indep
end
ently of the solv
ent nature. This suggests a dispersion of the solv
ents as individual molecules in the PDMS matrix. At high solv
ent cont
ents, part of the solv
ent crystallizes. Most of the crystallized solv
ent melts at a temperature close to the melting point of the bulk solv
ent, while the rest melts at a lower temperature. The DSC thermograms also show the change in crystallinity of swoll
en PDMS in differ
ent solv
ents. The poor solv
ent and the solv
ent of moderate power increase PDMS crystallinity due to the solv
ent-induced crystallization effect, while the good solv
ent reduces polymer crystallinity because of the solution effect.
Publisher: | Elsevier Science |
Language of Publication: | English |
Item Identifier: | S0376-7388(99)00187-8 |
Publication Type: | Article |
ISSN: | 0376-7388 |
Cited by: | - Chen, Gang,""Engineering thermophysical properties of micro- and nanostructures1""International Journal of Thermal Sciences2001pp. 693-701
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Bibliographic PageFull Text |
| Footnotes: Invited Plenary lecture, Congres francais de thermique SFT2001; 29-31 May 2001, Nantes, France.
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