𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Monitoring of degradation of thermally aged nylon 6,6. II. Pyrolysis–gas chromatography

✍ Scribed by Frank B. Burns; Clifford L. Renschler

Publisher
John Wiley and Sons
Year
1984
Tongue
English
Weight
320 KB
Volume
29
Category
Article
ISSN
0021-8995

No coin nor oath required. For personal study only.

✦ Synopsis

Pyrolysis-gas chromatography was used as an analytical method to evaluate 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 a t 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.

📜 SIMILAR VOLUMES

Monitoring of degradation in thermally a
Monitoring of degradation in thermally aged nylon 6,6. I. UV-visible absorption spectrophotometry
✍ Clifford L. Renschler; Frank B. Burns 📂 Article 📅 1984 🏛 John Wiley and Sons 🌐 English ⚖ 412 KB 👁 1 views

The absorbance of chromophores developed upon thermal aging of a typical nylon 6,6 yarn is investigated. The absorbance is found to correlate with the degree of tensile strength loss suffered by the yarn during the aging process. The measurement is shown to be quite sensitive, as the absorbance from

Combined pyrolysis and radiochemical gas
Combined pyrolysis and radiochemical gas chromatography for studying the thermal degradation of epoxide resins and polyimides. II. Degradation of polyimides
✍ D. P. Bishop; D. A. Smith 📂 Article 📅 1970 🏛 John Wiley and Sons 🌐 English ⚖ 370 KB 👁 1 views

## Abstract The thermal degradation of aromatic polyimides in nitrogen at 700°C was studied using pyrolysis gas chromatography, infrared spectroscopy, and radiochemical techniques. Degradation mechanisms were postulated to account for the breakdown products found and to explain variations in the ra

A study of thermal degradation of poly(a
A study of thermal degradation of poly(aryl-ether-ether-ketone) using stepwise pyrolysis/gas chromatography/mass spectrometry
✍ C. J. Tsai; L. H. Perng; Y. C. Ling 📂 Article 📅 1997 🏛 John Wiley and Sons 🌐 English ⚖ 205 KB 👁 1 views

Thermal degradation of poly(aryl-ether-ether-ketone) (PEEK) was investigated using stepwise pyrolysis/gas chromatography/mass spectrometry (Py/GC/MS) by consecutively heating the sample at fixed temperature intervals to achieve narrow temperature pyrolysis conditions. The individual mass chromatogra