ISSN:
1013-9826
Quelle:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Thema:
Maschinenbau
Notizen:
This study describes a method of good dispersion and alignment of VGCFs, and examinesthe effect of nanofiber content on the mechanical properties of nanocomposites. The dispersion ofnanofibers was carried out by solution blending, mechanical mixing, and sonication. Levels of 4% –31% volume content of VGCFs were mixed with polypropylene (PP) powder, and then weremelt-mixed using a twin-screw extruder. For the further alignment of fibers, extruded rods werestacked in the mold cavity for the compression molding. In the case of 31% volume content, tensilemodulus and strength improved by 100% and 40%, and the flexural modulus and strength increasedby 120% and 25%, respectively. The shear modulus showed 65% increase, but the strength droppedsharply by 40%. In the transverse direction, the tensile, flexural, and shear strength decreased as morefibers were added. The matrix modification by maleic anhydride (MAPP) increased the tensile andflexural properties of VGCF/PP by 20% - 30% in the longitudinal direction, and 40% - 250% increasein the transverse direction. The fiber surface treatment by plasma improved tensile and flexuralproperties of untreated VGCF/PP (18 % vol) composites by 10% - 30% in the longitudinal direction,but strength in the transverse direction decreased by 30% - 40%
Materialart:
Digitale Medien
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.334-335.829.pdf
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