Park, WK Kim, JH Lee, SS Kim, J Lee, GW Park, M 2024-01-21T05:01:58Z 2024-01-21T05:01:58Z 2021-09-03 2005-06 1598-5032 https://pubs.kist.re.kr/handle/201004/136435 Multi-walled carbon nanotubes (MWNTs) pre-treated by concentrated mixed acid or oxidized at high temperature were melt mixed with poly(methyl methacrylate) (PMMA) using a twin screw extruder. The morphologies and electrical properties of the MWNT/PMMA composites were investigated. The thermally treated MWNTs (t-MWNTs) were well dispersed, whereas the acid treated MWNTs (a-MWNTs) were highly entangled, forming large-sized clusters. The resulting electrical properties of the composites were analyzed in tenus of the carbon nanotube (CNT) dispersion. The experimental percolation threshold was estimated to be 3 wt% of t-MWNTs, but no percolation occurred at similar concentrations in the a-MWNT composites, due to the poor dispersion in the matrix. English POLYMER SOC KOREA BEHAVIOR SCIENCE Effect of carbon nanotube pre-treatment on dispersion and electrical properties of melt mixed multi-walled carbon nanotubes/poly(methyl methacrylate) composites Article 10.1007/BF03219053 1 MACROMOLECULAR RESEARCH, v.13, no.3, pp.206 - 211 MACROMOLECULAR RESEARCH 13 3 206 211 scie scopus kci ART000963392 000230276200006 2-s2.0-21644446194 Polymer Science Polymer Science Article BEHAVIOR SCIENCE carbon nanotubes CNT/polymer composites electrical conductivity acid treatment thermal treatment melt mixing