Study of spherulites in a semi-crystalline polymer using acoustic microscopy

DOI	Trouver le DOI : https://doi.org/10.1557/PROC-142-253
Auteur	Rechercher : Duquesne, J. Y.¹; Rechercher : Yamanaka, K.¹; Rechercher : Neron, C.¹; Rechercher : Jen, C. K.¹; Rechercher : Piche, L.¹; Rechercher : Lessard, G.¹
Affiliation	Conseil national de recherches Canada
Format	Texte, Article
Résumé	The local elastic properties of a semi-crystalline polymer (isotactic polypropylene) have been investigated with the use of scanning acoustic microscopy (SAM) techniques. The operating frequency was 775 MHz and the temperatures ranged between 25 and 60°C. A new and effective signal processing method was developed to process the material signature V(z) curve. This method avoids complicated calibration procedures involved with operating the SAM lens at different temperatures. Longitudinal velocities VL(α) and VL(β) in individual α and β-type spherulites of isothermally crystalized samples have been measured. Acoustic velocity of a quenched sample was also obtained. It was found that vL(α) and VL(β) were nearly equal but the acoustic impedances of α and β-spherulites were unexpectedly very different.
Date de publication	1988
Maison d’édition	Cambridge University Press Materials Research Society
Dans	MRS Proceedings 142, 253 (1988).
Langue	anglais
Publications évaluées par des pairs	Oui
Exporter la notice	Exporter en format RIS
Signaler une correction	Signaler une correction (s'ouvre dans un nouvel onglet)
Identificateur de l’enregistrement	9cef13a5-f6e2-4379-9a3b-f8088f293b77
Enregistrement créé	2024-03-19
Enregistrement modifié	2024-03-19

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Date de modification :: 2026-09-16