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Monitoring of degradation of thermally aged nylon 6,6. II. Pyrolysis–gas chromatography
Author(s) -
Burns Frank B.,
Renschler Clifford L.
Publication year - 1984
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1984.070290410
Subject(s) - pyrolysis , ultimate tensile strength , nylon 6 , caprolactam , materials science , degradation (telecommunications) , gas chromatography , composite material , humidity , polyamide , chemistry , chromatography , polymer chemistry , polymer , organic chemistry , telecommunications , physics , computer science , thermodynamics
Pyrolysis–gas chromatography was used as an analytical method to evaluated the extent of chemical changes that occur in aged yarns and to demonstrate any correlation between measured physical properties and pyrolysis products. Nylon 6,6 yarn samples (2.5–3.0 mg) that were control‐degraded as a function of humidity, temperature, and time were pyrolyzed at 500°C and chromatographed on a Graphpac AT‐1000 column. The peak heights of pyrolysis products unique to the degraded material were correlated with measured tensile strength loss (−5 to −75%) of the yarns. Linear relationships were found for several of the products, one of which was identified as caprolactam. Significant changes in the pyrograms were observed in nylon with tensile strength losses of 5% or less.