Collect. Czech. Chem. Commun. 1993, 58, 2403-2414
https://doi.org/10.1135/cccc19932403

Molecular Structure of a Cyclic Dimeric Model of Poly(6-hexanelactam)

Bohdan Schneidera, Jan Kvardab, Jiří Dybala, Pavel Schmidta, Miloš Suchopáreka and Irena Prokopováb

a Institute of Macromolecular Chemistry, Academy of Sciences of the Czech Republic, 162 06 Prague 6, Czech Republic
b Department of Polymers, Prague Institute of Chemical Technology, 166 28 Prague 6, Czech Republic

Abstract

Two crystalline forms of the cylindric dimer of 6-hexanelactam were studied by DSC, Raman, IR, NMR and computational methods. It was found that the high-temperature modification contains the energetically most favoured conformational structure, the low temperature modification contains the energetically less favoured conformation stabilized by stronger hydrogen bonds.