The polymerization of crystalline trioxane. I. evidence for a cooperative mechanism

A survey of the possible modes of' polymerization of trioxane is followed by a discussion of current ideas concerning the course of the polymerization. The polymerization, which involves ring cleavage, is characterized by a number of side reactions of the growing polyoxymethylene cations, such as chain transfer, transacetalization, and hydride shift.These reactions not only determine the nature of the endgroups and the molecular weight of the resulting polyoxyrnethylenes, but are also responsible for their chemical and molecular uniformity. Special emphasis is placed on the role of the monomeric formaldehyde formed during the polymerization of trioxane. The polyoxymethylenes obtained by the cationic polymerization of trioxane are similar in structure to those obtained by the cationic polymerization of formal- Polymerization of

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Morphological effects on the bulk polymerization of trioxane in the solid state by γ‐radiation

Kiss

Kovacs

et al. 1981

J of Applied Polymer Sci

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SynopsisThe solid-state polymerization by y-radiation and postpolymerization of bulk samples of trioxane has been investigated. Different thermal treatment results in radically different initial morphologies of the melt-crystallized trioxane which in turn have a profound influence on the yield and morphology of the resulting poly(oxymethy1ene) (POM). The polymerization yield increases in the following series: melt-crystallized trioxane with an "opaque" (small grains) morphology, as-grown needles, trioxane with a "quasi-transparent" morphology, and finally thermally oriented crystals. Furthermore, little additional POM is formed during repeated polymerization cycles. The observation of an extensive nodulation of the polymer fibrils when the yield is high is consistent with a multiple-stage growth model for the solid-state polymerization of trioxane.

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The polymerization of crystalline trioxane. I. evidence for a cooperative mechanism

Cited by 16 publications

References 20 publications

Polymerisation von Trioxan

Polymerisation von Trioxan

Polymerization of Trioxane

Morphological effects on the bulk polymerization of trioxane in the solid state by γ‐radiation

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