Abstract
The pressure dependence of transitions in perfluorododecyloctane-F12H8-and in perfluorododecylhexadecane-F12H16)-has been measured from 10 to 200 MPa, from room temperature up to 220° C. The two transitions within this range-the transition of the alkane block from crystalline to mesomorphic, Tss, and the transition to melt, Tm-exhibit different pressure coefficients. As a pecularity, for F12H16 Tss and Tm superimpose at 10 MPa, in accordance to atmospheric pressure DSC data. Pressure dependences of transitions are given as well as their melting enthalpies.
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