Artículo
Impact properties and microhardness of double-gated glass-reinforced polypropylene injection moldings
Fecha de publicación:
10/08/2009
Editorial:
Wiley
Revista:
Polymer Engineering and Science
ISSN:
0032-3888
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Injection moldings with weld lines were produced in glass reinforced polypropylene grades differing in filler content using a two-gated hot runner injection mold. The skin-core microstructure developed during injection molding was qualitatively analyzed by means of optical and scanning electronic microscopy techniques. The load bearing capacity of the moldings was assessed by uniaxial tensile-impact and biaxial instrumented falling dart impact tests. Microhardness was also used to ascertain the possibility of using it as a simple nondestructive technique for characterizing glass fiber-reinforced injection moldings. The properties were monitored at various points to evaluate their variation at the bulk and the knit region. The biaxial impact test highlights the 10-fold reduction of the impact strength caused by the weld line.
Palabras clave:
Glass Reinforced Pp
,
Impact
,
Injection Moulding
,
Microhardenss
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Colecciones
Articulos(INTEMA)
Articulos de INST.DE INV.EN CIENCIA Y TECNOL.MATERIALES (I)
Articulos de INST.DE INV.EN CIENCIA Y TECNOL.MATERIALES (I)
Citación
Martínez Gamba, Matías Rafael; Pouzada, Antonio Sergio; Frontini, Patricia Maria; Impact properties and microhardness of double-gated glass-reinforced polypropylene injection moldings; Wiley; Polymer Engineering and Science; 49; 9; 10-8-2009; 1688-1695
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