ISSN:
0449-2951
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
Trioxane, the cyclic trimer of formaldehyde, is easily polymerized by ionizing radiation in the solid state at a temperature slightly below the melting point. It was found that this post-polymerization is analogous to the in-source polymerization, but its overall activation energy is more than 40 kcal./mole, which is much larger than for in-source polymerization. A kinetic scheme is proposed for the post-polymerization which accounts for the experimental results. In-source polymerization probably occurs by an ionic mechanism, but three co-exist two different mechanisms in the post-polymerization. One is probably initiated by the decomposition of a product produced by the ionizing radiation in the presence of oxygen. The other has not yet been clarified, but it does not seem to be due to trapped radical or ionic species. The thermal decomposition of the polymer formed and the influence of additives, such as methanol, and benzene, on post-polymerization were also studied.
Additional Material:
18 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1964.100020641
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