Thermo-oxidation of lactam-based polyamides with carboxylic end-groups. Decomposition of 6-hydroperoxy-6-hexanelactam in the presence of carboxylic acids
✍ Scribed by B. Lánská
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 645 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0014-3057
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✦ Synopsis
Carboxylic acids initiate the homolytic decomposition of 6-hydroperoxy-6-hexanelactam to alkoxyl and hydroxyl radicals and the reaction of the aldehyde formed from the alkoxyl with 6-hydroperoxy-6-hexanelactam giving monoamide of adipic acid. Polyamides with carboxylic end-groups are oxidized in a similar way; the higher is the content of carboxylic groups, the faster the polymers are oxidized. The decomposition of polymeric hydroperoxide results in the scission of macromolecule; new end-groups are carboxyl and primary amide. Oxidation of polyamides with earboxylic end-groups do not lead to colour changes of the material.