Molar melting enthalpy in an homologous series of mesophasic polymers
✍ Scribed by Pio Iannelli; Antonio Roviello; Augusto Sirigu
- Publisher
- Elsevier Science
- Year
- 1982
- Tongue
- English
- Weight
- 265 KB
- Volume
- 18
- Category
- Article
- ISSN
- 0014-3057
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✦ Synopsis
The melting point depression of polymer-solvent mixtures as a function of the concentration has been measured by DSC methods for a group of semiflexible linear mesophasic polymers of formula
The molar enthalpic changes associated with the phase transitions have been determined. The values of the ratio between the molar isotropization entropy and the total molar entropic change relative to the sequence of phase transitions leading from the crystal phase to the isotropic liquid have been taken into account as an indication of the order of the mesophase. A particularly high value of this ratio has been found for the even members of the homologous series of polymers.