Proton magnetic resonance absorption in dry nylons 66 and 610

✍ Scribed by Jones, D. W.

• Publisher: John Wiley and Sons
• Year: 1962
• Weight: 505 KB
• Volume: 59
• Category: Article
• ISSN: 0022-3832
• DOI: 10.1002/pol.1962.1205916805

✦ Synopsis

Abstract

A comparison of the temperature dependence of the nuclear resonance line‐width and second moment for dried chip and rod samples of nylon 66 and 610, as measured by several authors, reveals discrepancies within the range 80 to 400°K. Room temperature measurements with a Pound‐Watkins spectrometer suggest that neither linewidth nor second moment varies greatly with radiofrequency field, although saturation may occur at low temperatures. It is concluded that the nuclear resonance differences reflect sample differences, at least for the higher temperatures. Evidence is considered for the decomposition of the continuous nuclear resonance changes in polyamides into more discrete “transitions;” in nylon 66, there are nuclear resonance effects near 120, 200, 330, and 370°K.