Poly(methyl methacrylate)/multiwalled carbon nanotube microspheres fabricated via in-situ dispersion polymerization

2007 ◽  
Vol 46 (2) ◽  
pp. 182-189 ◽  
Author(s):  
Soon-Min Kwon ◽  
Hun-Sik Kim ◽  
Seung Jun Myung ◽  
Hyoung-Joon Jin
Keyword(s):  
Carbon Nanotube ◽  
Methyl Methacrylate ◽  
Dispersion Polymerization ◽  
Multiwalled Carbon Nanotube ◽  
Multiwalled Carbon ◽  
Poly Methyl Methacrylate

Microspherical Poly(methyl methacrylate)/Multiwalled Carbon Nanotube Composites Prepared via In Situ Dispersion Polymerization

2007 ◽  
Vol 7 (11) ◽  
pp. 4045-4048 ◽  
Author(s):  
Hun-Sik Kim ◽  
Seung Jun Myung ◽  
Rira Jung ◽  
Hyoung-Joon Jin
Keyword(s):  
Electron Microscopy ◽  
Carbon Nanotube ◽  
Methyl Methacrylate ◽  
Dispersion Polymerization ◽  
Multiwalled Carbon ◽  
Poly Methyl Methacrylate ◽  
Transmission Electron ◽  
Multi Walled Carbon Nanotube ◽  
Nanotube Composites

In this study, microspherical poly(methyl methacrylate)/multi-walled carbon nanotube (PMMA/MWCNT) composites were directly prepared by in situ dispersion polymerization using poly (N-vinylpyrrolidone) in methanol media. PMMA/MWCNT microspheres having a diameter of 2.6∼3.9 μm and a molecular weight of 58,000∼65,000 g/mol with a 15.7∼19.5% coefficient of variation (Cv) were synthesized. The morphology of the synthesized composite was investigated using scanning electron microscopy and transmission electron microscopy. The experimental results demonstrated that MWCNTs are well dispersed and embedded in the final PMMA/MWCNT microspheres. The prepared PMMA/MWCNT microspheres were investigated in terms of their capacity to serve as an electrorheological (ER) materials.

Electrical and Rheological Properties of Double Percolated Poly(methyl methacrylate)/Multiwalled Carbon Nanotube Nanocomposites

2007 ◽  
Vol 7 (11) ◽  
pp. 3847-3851 ◽  
Author(s):  
Sung-Hun Jin ◽  
Dai-Soo Lee
Keyword(s):  
Carbon Nanotube ◽  
Methyl Methacrylate ◽  
Rheological Properties ◽  
Critical Concentration ◽  
Threshold Concentration ◽  
Multiwalled Carbon Nanotube ◽  
Multiwalled Carbon ◽  
Poly Methyl Methacrylate ◽  
Critical Concentrations ◽  
Double Percolation

Electrical and rheological properties of nanocomposites based on poly(methyl methacrylate) (PMMA) and multiwalled carbon nanotube (MWCNT) were studied from view points of double percolation by adding crosslinked methyl methacrylate-butadiene-styrene (MBS) copolymer particles to lower percolation threshold concentration of MWCNTs. It was found that the critical concentrations of MWCNTs for the percolation in the nanocomposites decrease and then increase with increasing the MBS contents of the nanocomposites. It is postulated that the addition of MBS at low concentrations results in double percolation of MWCNT and the significant decrease of critical concentration for the percolations. However, adding MBS particles in large amounts results in limited space for the distribution of MWCNTs and less efficient dispersion of the MWCNTs and the increase of the critical concentrations of MWCNTs for the percolations. Rheological properties and change of Tgs reflect large interfacial areas in the well dispersed nanocomposite and were also interpreted to support the speculations for the effects of MBS contents and MWCNT concentrations of PMMA/MWCNT nanocomposites.

Electrorheology of Multiwalled Carbon Nanotube/Poly(methyl methacrylate) Nanocomposites

2005 ◽  
Vol 26 (19) ◽  
pp. 1563-1566 ◽  
Author(s):  
Seung J. Park ◽  
Min S. Cho ◽  
Sung T. Lim ◽  
Hyoung J. Choi ◽  
Myung S. Jhon
Keyword(s):  
Carbon Nanotube ◽  
Methyl Methacrylate ◽  
Multiwalled Carbon Nanotube ◽  
Multiwalled Carbon ◽  
Poly Methyl Methacrylate

Absorption behavior of poly(methyl methacrylate)–multiwalled carbon nanotube composites: effects of UV irradiation

2017 ◽  
Vol 19 (10) ◽  
pp. 7359-7369 ◽  
Author(s):  
Je-Chuan Hsu ◽  
Wenxin Cao ◽  
Fuqian Yang ◽  
Tsong-Jen Yang ◽  
Sanboh Lee
Keyword(s):  
Carbon Nanotubes ◽  
Carbon Nanotube ◽  
Methyl Methacrylate ◽  
Uv Irradiation ◽  
Practical Importance ◽  
Multiwalled Carbon Nanotube ◽  
Multiwalled Carbon ◽  
Poly Methyl Methacrylate ◽  
Nanotube Composites ◽  
Carbon Nanotube Composites

Understanding the effects of carbon nanotubes (CNTs) and ultraviolet (UV) irradiation on solvent transport in polymers is of practical importance for the applications of polymer–CNT composites in electronics and photonics.

Preparation and Properties of the Nanocomposites Based on Poly(methyl methacrylate-co-butyl acrylate) and Multiwalled Carbon Nanotube

2008 ◽  
Vol 8 (9) ◽  
pp. 4675-4678 ◽  
Author(s):  
Sung-Hun Jin ◽  
Dai-Soo Lee
Keyword(s):  
Carbon Nanotube ◽  
Methyl Methacrylate ◽  
Butyl Acrylate ◽  
Dynamic Mechanical Properties ◽  
Multiwalled Carbon Nanotube ◽  
Multiwalled Carbon ◽  
Acrylic Copolymer ◽  
Mwcnt Content ◽  
Poly Methyl Methacrylate ◽  
Acrylic Copolymers

Nanocomposites, based on multiwalled carbon nanotube (MWCNT) and various acrylic copolymers of poly(methyl methacrylate-co-butyl acrylate)s, were prepared and the effects of the copolymer compositions on the electrical and the dynamic mechanical properties of the nanocomposites investigated. Latices of the acrylic copolymer were prepared by emulsion polymerization, and then mixed with MWCNT dispersed in N-methylpyrrolidone to prepare the nanocomposites. The electrical resistivities of the nanocomposites showed threshold decreases with increasing MWCNT content, due to percolation. The critical MWCNT content (Pc) in the nanocomposites for percolation showed minimum with increasing butyl acrylate content within the poly(methyl methacrylate-co-butyl acrylate). Specifically, the nanocomposites of the acrylic copolymer with a butyl acrylate content of 20∼40 wt% showed the lowest Pc value of all the nanocomposites investigated. The nanocomposites showed large increases in the storage moduli in the rubbery plateau region. A decrease in the glass transition temperature (Tg) was observed with the nanocomposites and attributed to the characteristics of the nanocomposites, where the large surface area of MWCNT makes the matrix polymers similar to those of free stand thin film polymers.

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