Determination of the individual cyclic oligomers in equilibrium systems from E-caprolactam and water

D. Heikens

    Research output: Contribution to journalArticleAcademicpeer-review

    22 Citations (Scopus)

    Abstract

    The contents of cyclic dimer, trimer, and tetramer in equil. polymers were detd. by fractional sublimation of a MeOH ext. The sublimation temps. are 223 Deg, 254 Deg, and 282 Deg (with decompn.) for the di-, tri-, and tetramer, resp. The proportion of cyclic di-, tri-, and tetramer is 2:1:2 (221.5 Deg) and 5:2:7 (253.5 Deg). The formation of H bonds between pairs of NHCO groupings is believed responsible for the stability of the tetramer. [on SciFinder (R)]
    Original languageEnglish
    Pages (from-to)1199-1204
    JournalRecueil des Travaux Chimiques des Pays-Bas
    Volume75
    Issue number10
    DOIs
    Publication statusPublished - 1956

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