A new fiber‐sampling technique for infrared spectroscopy as applied to nylon 6 and poly(ethylene terephthalate)

Abstract

SynopsisA number of techniques have been used in the past for obtaining the infrared spectra of fine fibers. A new technique has been developed which overcomes many of the problems of previous methods. The present technique involves winding a single filament between two salt windows which are separated by a spacer which is the same or slightly greater in thickness than the fibers.Good-quality polarized infrared spectra were obtained on oriented poly(ethy1ene terephthalate) and oriented nylon 6 fibers with the new technique. The data demonstrate the high level of "A" conformation orientation present in highly drawn nylon 6 fibers and the existance of chain folds in drawn poly(ethy1ene terephthalate) fibers. The structural changes which occur during the shrinkage of nylon 6 fibers are also demonstrated.This results in a layer of adjacent parallel fibers.

A Study on the Properties of Silk and Nylon 6 Fabrics by Tannic Acid Treatment

“…The peak intensity at 1,615~1620㎝ -1 , representative of Amide I structure (Tirpak, & Sibilia, 1973), decreases compared to the control fabric's with the increase of treatment concentration of tannic acid. It may be inferred that the increase in hydrogen bond amount between the tannic acid and silk fibroin molecules diminishes the peak intensity at amide I structure.…”

Far‐infrared spectroscopy of polyamide fibers and fabrics

“…Infrared (IR) spectroscopy in the mid-IR range (4000-400 cm-') has frequently been used to obtain information concerning the chemical and physical state of fibers (1,2). Absorptions in the far-IR range (<400 cm-') are, however, potentially more informative than those in the mid-IR range for physical characterization of polymers because vibrations in this region will be very sensitive to the environment of the polymer chain (3).…”