Mass of nylon or to









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It can either be extruded and granulated at this point or directly spun into fibers by extrusion through a spinneret a small metal plate with fine holes and cooling to form filaments. From Wikipedia, the free encyclopedia. Isotopic labeling was used to characterize low-molecular weight volatile thermal-oxidative degradation products of nylon 6. As for aging times, previous results indicated that nylon 6. It is not used in films due to its inability to be oriented.

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Determination Of Molecular Weight Of Nylon

A comparison of mass spectra and ion fragmentation pathways for both unlabeled and isotopically labeled samples C and N aided in determining the exact location of the isotopically labeled atom s in each applicable nylon 6. As for aging times, previous results indicated that nylon 6. The authors acknowledge Donald Bradley for his assistance in sample preparation and aging. Polymer 44 , — CrossRef Google Scholar.

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Theoretical yield for creation of

Since our studies were not quantitative, relative peak areas for the detected products were not calculated or reported here. However, to our knowledge, this is the first time selective isotopic labeling has been used to identify the exact origin of nylon 6. Retrieved from " https. Data was analyzed using TSSPro 3. Acknowledgments Sandia National Laboratories is a multi-program laboratory managed and operated by Sandia Corporation, a wholly owned subsidiary of Lockheed Martin Corporation, for the U. Interpretation of Mass Spectra, 4th edn. In addition, mass spectral shifts due to isotopic enrichment provide a high level of information that can be used to pinpoint the origin of each degradation product with respect to a macromolecular structure.

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Description: Mechanical and Chemical Characterisation. Argon blanks were run between samples to eliminate potential degradation species carryover. Since GC retention times are known to be highly reproducible if all sampling conditions are constant [ 28 ], they allow for a direct comparison of known and unknowns across a sample set. All other unlabeled peaks in the chromatograms shown correspond to species with signal too far below the background noise for a positive identification to be made. Figure 2 Gas chromatograms of total ion current TIC vs. Skip to main content Skip to sections.
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