Scopul nostru este sprijinirea şi promovarea cercetării ştiinţifice şi facilitarea comunicării între cercetătorii români din întreaga lume.
Autori: M.- C. Popescu, C. Vasile, D. Filip, D. Macocinschi, Gh. Singurel
Editorial: J. Appl. Polym. Sci, 94, p.1156-1163, 2004.
FT-IR spectroscopy has been employed to
study compatibility, melting, and crystallization of the polyethylene
adipate (PEA)/cholesteryl palmitate (CP) blends.
The changes in FT-IR spectra were followed by controlled
rate of heating and cooling. The bands corresponding to the
crystalline structure have been assigned. The accuracy of the
transition temperature determination has been improved by
fitting the curve of the integral absorbance dependence on
temperature with a Boltzmann function. From dependence
of the transition temperatures on the composition of the
blend, it has been established that for each mixing ratio a
certain mass fraction of CP should be dissolved in the PEA
matrix. The PEA/CP blends behave as a phase-separated
system with partial miscibility.
Cuvinte cheie: FT-IR spectroscopy; polyethylene adipate; cholesteryl palmitate; melting; blend