Abstract
Orientation and phase transitions of cetyl alcohol confined within polymeric matrices of high-density polyethylene and polytetrafluoroethylene deformed in adsorption-active media have been investigated by polarization IR spectroscopy. Phase transitions of cetyl alcohol proceed within broad temperature intervals ∼ 25°C for melting and ∼ 15°C for the polymorphic transition), owing to the existence in the investigated systems of a broad pore size distribution and to a lowering of the transition temperature of highly dispersed cetyl alcohol. Both the entropy and enthalpy of melting of cetyl alcohol and tridecanoic acid entrapped in micropores of polymeric matrices are lowered in comparison with values observed for non-confined compounds.
Published Version
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