PHASE-TRANSITIONS IN PETROLEUM WAXES - CORRELATION WITH PROPERTIES

Solid-solid phase transitions in petroleum waxes of different melting points and n-paraffinic distributions have been investigated by differ ential scanning calorimetry. The variation in the hardness of these wa xes with temperature, measured by estimating the needle penetration, h as been correlated with the phase transition phenomenon. It is found t hat the solid-solid phase transitions depend on both the range and con centration of the n-paraffins present in the wax.