Investigation of the influence of the nano-nuclei habit on the specifics of phase transitions in long-chain molecular crystals and polymers

Abstract

Abstract The thermodynamic parameters of a long chain molecular crystals (LCMCs) set are analyzed. We revealed the dependence of LCMC’s melting points with a different chain length on the habitus of the first-order phase transition’s elementary volume. It was shown that LCMCs with the same chemical structure of the “core” (normal alkanes {CH3(CH2)nCH3}, normal alkanols {CH3(CH2)nCOH}, diols {COH(CH2)nCOH}, carboxylic {CH3(CH2)nCOOH} and dicarboxylic {COOH(CH2)nCOOH} acids) lose their individual thermodynamic properties and approach the properties of polymethylene with an increase in the number of –CH2– groups.