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An automatic measurement of density of polyethylene

From National Research Council Canada

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DOIResolve DOI: https://doi.org/10.1016/S1474-6670(17)55589-5
AuthorSearch for: 1
Affiliation
  1. National Research Council Canada
FormatText, Article
Conference6th International IFAC/IFIP/IMEKO Conference on Instrumentation and Automation in the Paper, Rubber, Plastics and Polymerization Industries, Oct. 27-29, 1986, Akron, Ohio
Subjectpolyethylene; density; computer-control; ultrasonic; elsatic modulus; modelling; quality control
Abstract
The density, p, is a very important parameter for the characterization of polyethylenes (PE). Usually, p, is measured using a density gradient column, on a small piece taken from a plaque which is prepared according to ASTM standards. Here we present a new technique of measuring the density of PE, which is based on the propagation of ultrasonic waves in the standard (ASTM) plaques of PE. While the acoustic method has an accuracy equivalent to that of the standard method, it also possesses a number of advantages: it is easy to use, foolproof, reliable, repetitive and nondestructive. Above all, the measurement is automatic and rapid (30 sec.). The basic principle of the measurement will be described and results will be shown. The theoretical foundation will be discussed on the grounds of a model for the elastic moduli of multiphase media.
Publication date
PublisherElsevier
In
  • IFAC Proceedings Volumes 20, no. 13: 223–228.
LanguageEnglish
Peer reviewedYes
NRC numberCNRC 25090
NRC-IGM86-403-257
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Record identifiere5d8d810-66d6-4cf3-96c7-e736d2b87389
Record created2019-11-06
Record modified2020-06-03
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