Open AccessОбщность термодинамических свойств кристаллов нормальных длинноцепочечных алифатических соединений и полиметилена
Author(s) -
В.М. Егоров,
В.А. Марихин
Publication year - 2018
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2018.07.46136.021
Subject(s) - chemistry , melting point , stereochemistry , crystal (programming language) , crystallography , polymer chemistry , organic chemistry , programming language , computer science
We analyze the dependency of melting points of molecular crystals with different chain lengths on the crystal habit of elementary volume for the first-order phase transition. We demonstrate that molecular crystals with identical chemical structure of their cores—unbranched alkanes CH_3(CH_2)_ n CH_3, diols HOC(CH_2)_ n COH, unbranched aliphatic alcohols CH_3(CH_2)_ n COH, saturated carboxylic acids CH_3(CH_2)_ n COOH, and dicarboxylic acids HOOC(CH_2) n COOH—lose their identity and individual properties and evolve toward polyethylene as the number of repeating–CH_2–groups increases.