The state of various alcohols with carbon numbers from one to eight in a poly (dimethylsiloxane) (PDMS) membrane was investigated by d.s.c. Methanol, ethanol, 2-propanol, 1-butanol and 1-pentanol were present in the PDMS membrane in the bound state as well as in the bulk state, while 1-octanol was comprised only of free 1-octanol. The amount of bound alcohol increased with increase in the carbon number up to four and then decreased with further increase in the carbon number. We concluded that the interaction between the methyl group in the PDMS membrane and the alkyl moiety in the alcohol was a specific interaction to form bound alcohol in the PDMS membrane.
Посилання на статтю:
A calorimetric study of various alcohols in a poly (dimethylsiloxane) membrane / Masakazu Yoshikawa and Takeshi Matsuura // Polymer. – 1992. – Vol 33. – P. 4656-4658.