Fiber Identification at the Microgram Level by Infrared Spectroscopy

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Abstract
A simple technique has been developed to enable ir characterization of a small (∼μg) quantity of a fiber mounted as a monofilament bundle between thin steel jaws. The versatility of the technique is illustrated both for thermoplastic filaments and for insoluble and infusible fibers derived from inherently flame-resistant polymers. Even spectra on hard, glassy filaments such as Kevlar® and E-glass were readily obtained.