Depolymerization of nylon 6 waste fibers

The depolymerization of nylon 6 was carried out with various solvents, such as formic acid, hydrochloric acid, and sulfuric acid, followed by heating under reflux for different times. From the polymer dissolved and refluxed in formic acid, degradation products with different ranges of molecular weig...

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Bibliographic Details
Published in:Journal of applied polymer science 2006-04, Vol.100 (1), p.186-190
Main Authors: Shukla, S. R., Harad, Ajay M., Mahato, D.
Format: Article
Language:English
Subjects:
Applied sciences
Exact sciences and technology
monomers
nylon
Polymer industry, paints, wood
recycling
Technology of polymers
viscosity
Waste treatment
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Summary:The depolymerization of nylon 6 was carried out with various solvents, such as formic acid, hydrochloric acid, and sulfuric acid, followed by heating under reflux for different times. From the polymer dissolved and refluxed in formic acid, degradation products with different ranges of molecular weights were collected by fractional precipitation, with small lots of distilled water added as a nonsolvent. The characterization of different fractions was carried out by the measurement of the viscosity‐average molecular weight, the number‐average molecular weight, and the number of amino end groups. The presence of the monomer, aminocaproic acid, was confirmed by thin‐layer chromatography in the case of hydrochloric acid treated nylon 6. With a strongly acidic ion‐exchange resin, the monomer was separated in its purest form, and the melting point was noted. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 100: 186–190, 2006
ISSN:0021-8995
1097-4628
DOI:10.1002/app.22775