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Recycling of dry and wet polyamide 6

✍ Scribed by F. P. La Mantia; D. Curto; R. Scaffaro

Publisher: John Wiley and Sons
Year: 2002
Tongue: English
Weight: 83 KB
Volume: 86
Category: Article
ISSN: 0021-8995
DOI: 10.1002/app.11136

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✦ Synopsis

Abstract

Recycling of polycondensation polymers can give rise to secondary materials with good mechanical properties only if a careful drying is carried out before the melt reprocessing operations. The presence of humidity provokes the hydrolytic chain scission of the macromolecules and the consequent decrease of molecular weight and properties. In this work, the drying step was substituted by the addition of an antioxidant that is able to protect the macromolecules because it is the autioxidant is more prone to hydrolysis, thus removing the water from the melt. The mechanical properties of polyamide 6 reprocessed more times in wet conditions and in the presence of this stabilizer are even better than those obtained reprocessing the dry polyamide. © 2002 Wiley Periodicals, Inc. J Appl Polym Sci 86: 1899–1903, 2002

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