Thickness Effects on Material Properties in a Glass/Thermoplastic P.E.T. Injection Molding Compound Center for Composite Materials, Univ. of Delaware, Newark, DE

Format:

Conference/Event

Author/Creator:

Wetherhold, Robert C., author.

Conference Name:

Passenger Car Meeting and Exposition (1980-06-09 : Dearborn, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1980

Summary:

Rynite®* 545, a commercial short glass fiber/thermoplastic polyethylene terepthalate system, was injection molded into end-gated rectangular plaques of various thicknesses. The plaques were sectioned and characterized by scanning electron microscopy and by mechanical and thermal expansion tests. The glass fibers are shown to be highly aligned in "boundary layers" near the mold surfaces, and are distributed more randomly away from the mold surfaces. As part thickness increased, the aligned fiber boundary layers occupied a smaller proportion of the cross section, resulting in a decrease in mechanical properties. Tensile moduli are derived for boundary and center layers, which can be used to accurately predict the effective moduli at different thicknesses. In addition, the boundary layer thicknesses at the top and bottom surfaces were unequal, producing noticeable warping for thicker plaques

Notes:

Vendor supplied data

Publisher Number:

800812

Access Restriction:

Restricted for use by site license