1968
DOI: 10.1002/macp.1968.021110117
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Isolierung und charakterisierung von cyclischen oligomeren des formaldehyds

Abstract: ZUSAMMENFASSUNG: Bei der Aufarbeitung von Ruckstanden aus der Polymerisation von Trioxan konnten neben Trioxan und Tetroxan auch hohere cyclische Oligomere des Formaldehyds isoliert werden. Das Pentamere wurde dabei mit Hilfe der praparativen Gaschromatogaphie gewonnen, wiihrend zur Isolierung eines Ringes mit 15 Formaldehydeinheiten die Methode des Zonenschmelzens geeignet war. Die durch saure Agentien katalysierte Pyrolyse von Polytrioxan fuhrt ebenfalls zu hoheren cyclischen Oligomeren des Formaldehyds. Dur… Show more

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Cited by 24 publications
(3 citation statements)
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References 16 publications
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“…E.g. cyclic oligomers of formaldehyde with 3 to 15 units have been found when trioxane is polymerized (49); also at the polymerization of episulphides or dioxolane, cyclic oligomers appear (55); further in the course of the formation of polyesters and polyamides as well as at the metathesis reaction of cycloolefins (57). It is to be expected that oligomers could be shown to be present in other polymerization processes by applying the GPC-technique.…”
Section: Cyclic Oligomers Of the Triethylene Glycol Formalmentioning
confidence: 97%
See 1 more Smart Citation
“…E.g. cyclic oligomers of formaldehyde with 3 to 15 units have been found when trioxane is polymerized (49); also at the polymerization of episulphides or dioxolane, cyclic oligomers appear (55); further in the course of the formation of polyesters and polyamides as well as at the metathesis reaction of cycloolefins (57). It is to be expected that oligomers could be shown to be present in other polymerization processes by applying the GPC-technique.…”
Section: Cyclic Oligomers Of the Triethylene Glycol Formalmentioning
confidence: 97%
“…27°C; b.p. 56°C/0,4 Torr; ηβ° = 1,4541; NMR-signals of /3/ were first repor ted by Burg (49). NMR data obtained by us are summarized in Table III and IV. /3/ is polymerizable by several cationic initia tors in solution and in bulk at temperatures between -20°C and +150°C.…”
mentioning
confidence: 96%
“…109 Polyethylene oxide 110 and polypropylene oxide 111 decompose by two concomitant hydrogen transfer processes leading to aldehyde (or ketone) and methyl end-groups in the first case (Scheme 7b) and to alcohol and olefin end-groups in the second case (Scheme 7c).…”
Section: Polyimidesmentioning
confidence: 99%