Melting of the All-trans Planar Modification of Triblock Oligomers [alpha]-n-Alkyl-[omega]-n-alkoxyoligo(oxyethylene)s

Melting behavior of the all-trans planar modification of triblock oligomers H(CH2)n(OCH2CH2)mO(CH2)nH (n = 6, 8, and 10; m = 1-4) was studied by differential scanning calorimetry. The melting point, enthalpy of melting, and entropy of melting were measured and compared with those for n-alkanes that have similar molecular structures. Structural changes in going from the crystalline phase to the liquid phase were discussed on the basis of the observed thermal behavior.