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Proceedings Paper

Measurement of crystallinity in polyethylene welds and helical content in polypropylene welds using FTIR-microspectrometry
Author(s): Sheila M. Stevens
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Paper Abstract

At the current time there have been few studies on the fundamental changes in polymer chemistry which occur when a thermoplastic undergoes a welding cycle. The techniques described in this paper have been developed to study such changes. The experimental metho4s, using the bands at l894cm and 13O3cm for polyethylene and 998cm and 973cm for polypropylene, have been evaluated using parent materials, and were found to be sufficiently reproducible and accurate to distinguish small changes in crystallinity (polyethylene) and helical content (polypropylene) in weld areas.

Paper Details

Date Published: 1 October 1990
PDF: 8 pages
Proc. SPIE 1320, Infrared Technology and Applications, (1 October 1990); doi: 10.1117/12.22308
Show Author Affiliations
Sheila M. Stevens, Welding Institute (United Kingdom)

Published in SPIE Proceedings Vol. 1320:
Infrared Technology and Applications
Alan H. Lettington, Editor(s)

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