On-line measurement of polymer orientation using ultrasonic technology

Autor:	Russ Edwards, Charles L. Thomas
Rok vydání:	2001
Předmět:	chemistry.chemical_classification Materials science Polymers and Plastics Mineralogy General Chemistry Polymer Signal Amorphous solid Shear (sheet metal) Crystallinity Transducer chemistry Materials Chemistry Ultrasonic sensor Composite material Anisotropy
Zdroj:	Polymer Engineering & Science. 41:1644-1653
ISSN:	1548-2634 0032-3888
Popis:	The propagation velocity of an ultrasonic shear wave can be used to detect anisotropic behavior in the mechanical properties of a solid. Thus, an ultrasonic shear transducer imbedded in an injection mold produces a signal that is sensitive to polymer orientation. This results in a non-invasive, on-line technique for monitoring the orientation of polymer in an injection mold cavity during part cooling and solidification. The technique is shown to be quite sensitive for semicrystalline polymers, but much less effective for amorphous polymers. Sensor results are compared to mechanical tests.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::a2d7f18619a80cc24f75c7002d599902 https://doi.org/10.1002/pen.10862 Zobrazit plný text záznamu Plný text