Polyoxymethylene glycols, and

Utterback and co-workers [54] determined oligomers of polyoxymethylene glycols and ethers by derivatisation with ammonia then determination by capillary column GC. Okada [55] used temperature programmed GC to determine polymethylene oligomers. High temperature capillary GC has also been used to determine separate Novoloc phenolic and epoxy novolac oligomers [56]. 

Formaldehyde is the most frequently used aldehyde in the production of phenolic resins. At room temperature, it is a pungent, colorless, highly flammable gas. Formaldehyde is highly reactive and commonly conunercialized in aqueous solution stabilized with methanol, where it predominantly forms adducts with the solvent, that is, equilibrium mixtures of methylene glycol, polyoxymethylene glycols and hemiformals of these glycols with methanol (Kowatsch, 2010 Fink, 2005). 

Uttenbach and co-workers [133] characterised and determined formaldehyde oligomers by capillary column GC. The homologous samples of polyoxymethylene glycols and the corresponding monomethyl ethers were derivatised with ammonia prior to GC. 

To determine formaldehyde oligomers in polyoxymethylene glycols and the corresponding polyoxymethylene ethers Utterback et first derivitivized them with ammonia then determined the oligomers by capillary column gas chromatography. 

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See also in sourсe #XX -- [ ]

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