✦ LIBER ✦

A study on modified polymers by means of i.r. spectroscopy and thermal analysis

✍ Scribed by H. Alaminov; R. Markova

Publisher: Elsevier Science
Year: 1976
Tongue: English
Weight: 300 KB
Volume: 12
Category: Article
ISSN: 0014-3057
DOI: 10.1016/0014-3057(76)90001-x

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✦ Synopsis

Curing and destruction of phenol-formaldehyde resins, modified with waste oligomer resin from phenol production, were studied by means of i.r. and ESR spectroscopy and thermal analysis. In the process of curing synthesized polymers with hexamethylene tetramine, the latter was found to decompose giving dimethyleneimine and other products causing cross-linking of the polymers. Incorporation of nitrogen in the polymer was proved by means of i.r. spectra and elemental analysis. The activation energy of decomposition was determined by thermogravimetry. Analysis of ESR spectra suggested that free radical processes participate in curing and decomposition of phenol-formaldehyde polymers modified with waste phenol resin.

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