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An automatic measurement of density of polyethylene

Par Conseil national de recherches du Canada

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DOITrouver le DOI : https://doi.org/10.1016/S1474-6670(17)55589-5
AuteurRechercher : 1
Affiliation
  1. Conseil national de recherches du Canada
FormatTexte, Article
Conférence6th International IFAC/IFIP/IMEKO Conference on Instrumentation and Automation in the Paper, Rubber, Plastics and Polymerization Industries, Oct. 27-29, 1986, Akron, Ohio
Sujetpolyethylene; density; computer-control; ultrasonic; elsatic modulus; modelling; quality control
Résumé
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.
Date de publication
Maison d’éditionElsevier
Dans
  • IFAC Proceedings Volumes 20, nº 13 : 223–228.
Langueanglais
Publications évaluées par des pairsOui
Numéro du CNRCCNRC 25090
NRC-IGM86-403-257
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Identificateur de l’enregistremente5d8d810-66d6-4cf3-96c7-e736d2b87389
Enregistrement créé2019-11-06
Enregistrement modifié2020-06-03
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