| Summary: | 碩士 === 國立中興大學 === 材料科學與工程學系所 === 99 === In this study, the conductive polycarbonate（PC）/ acrylonitrile-butadiene-styrene copolymer（ABS）/ multi-walled carbon nanotube（MWNT）composites have been prepared using melt compounding method. The MWNT was modified using free radical reaction of maleic anhydride（MA）to graft on the surface of MWNT. For comparison, PC/ABS/carbon black（CB）composites were also fabricated through the same procedure. The electrical conductivity, mechanical and thermal properties of composites with various weight ratio will be discussed.
Raman spectroscopy shows a strong band at 1580 cm-1（G mode）and a disordered-induced peak at 1355 cm-1（D mode）, which may originate from the defects in the curned graphene sheets. Comparing the ID/IG ratio of the samples, which is 1.20 for MWNT and 1.48 for MA-modified MWNT, results the chemical functionalization increases the degree of disorder. The conductivity of fabricated PC/ABS composite would approach 103 Ω/□ by adding 1.0 wt% MWNT、1.5 wt% MWNT-MA and 12 wt% CB. The small amount of MWNT adding into PC/ABS system would also increase about 10 % in the tensile strength and flexural strength. But the high loading ratio of CB into this system could obtain better thermal property.
|
|---|
