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Dispersion‐Polymerized Carbon Nanotube/Poly(methyl methacrylate) Composite Particles and their Electrorheological Characteristics
Author(s) -
Kim Sung Tae,
Lim Jae Yun,
Park Bong Jun,
Choi Hyoung Jin
Publication year - 2007
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.200600543
Subject(s) - materials science , dispersion polymerization , carbon nanotube , methyl methacrylate , silicone oil , composite material , composite number , dispersion (optics) , zeta potential , thermal stability , electrorheological fluid , polymerization , electric field , chemical engineering , nanoparticle , polymer , nanotechnology , physics , engineering , quantum mechanics , optics
An in situ dispersion polymerization method was adopted to synthesize particulate composites of MWNTs and PMMA, mainly for the investigation of their electrorheological characteristics. The morphology of the PMMA microparticles synthesized in the presence of the MWNTs was examined by both SEM and TEM, showing that the MWNTs were not only grafted onto the surface of the PMMA microbeads, but were also embedded inside the synthesized microbeads. The synthesized MWNT/PMMA particulate composites were also characterized by zeta‐potential measurements and TGA for electric and thermal stability studies, respectively. A suspension of the MWNT/PMMA microparticles dispersed in silicone oil was found to show enhanced electrorheological properties on the increase of shear stresses when subjected to an external electric field, exhibiting high yield stresses despite the tiny amount of the MWNT associated.