An experimental and theoretical investigation of the compressive properties of multi-walled carbon nanotube/poly(methyl methacrylate) nanocomposite foams

Polymer ◽  
2011 ◽  
Vol 52 (13) ◽  
pp. 2899-2909 ◽  
Author(s):  
Limeng Chen ◽  
Linda S. Schadler ◽  
Rahmi Ozisik
Keyword(s):  
Carbon Nanotube ◽  
Methyl Methacrylate ◽  
Theoretical Investigation ◽  
Compressive Properties ◽  
Poly Methyl Methacrylate ◽  
Nanocomposite Foams ◽  
Multi Walled Carbon Nanotube

Formation of aramid-silica-grafted-multi-walled carbon nanotube-based nanofiber via the sol-gel route: thermal and mechanical profile of hybrids with poly(methyl methacrylate)

e-Polymers ◽  
2014 ◽  
Vol 14 (3) ◽  
pp. 177-185
Author(s):  
Ayesha Kausar
Keyword(s):  
Carbon Nanotube ◽  
Methyl Methacrylate ◽  
Sol Gel ◽  
Tensile Modulus ◽  
Electrospun Nanofibers ◽  
Decomposition Temperature ◽  
Filler Loading ◽  
Silica Network ◽  
Poly Methyl Methacrylate ◽  
Multi Walled Carbon Nanotube

AbstractIn this study, thermally and mechanically stable poly(methyl methacrylate) (PMMA)-based nanocomposites were produced through the reinforcement of electrospun aramid-silica-grafted multi-walled carbon nanotube-based nanofibers (MWCNT-Ar-Si). The multi-walled carbon nanotube was initially modified to prepare an isocyanatopropyltriethoxysilane-grafted MWCNT via the sol-gel route using 3-isocyanatopropyl-triethoxysilane and tetraethoxysilane (TEOS). The silica network was developed and linked to MWCNT by hydrolysis and condensation of TEOS. The said isocyanatopropyltriethoxysilane-grafted MWCNT was electrospun with the aramid solution. The electrospun MWCNT-Ar-Si nanofibers (0.1–1 wt.%) were then reinforced in a PMMA matrix. For comparative analysis, PMMA was also reinforced with 0.1–1 wt.% of aramid nanofibers. The tensile modulus of PMMA/MWCNT-Ar-Si 0.1 was 5.11 GPa, which was increased to 13.1 GPa in PMMA/MWCNT-Ar-Si 1. The 10% decomposition temperature of PMMA/MWCNT-Ar-Si 0.1–1 hybrids was in the range of 479–531°C. The glass transition temperature, determined from the maxima of tan δ data using dynamic mechanical thermal analysis, showed an increase with the filler loading and was maximum (301°C) for PMMA/MWCNT-Ar-Si 1 with 1 wt.% of MWCNT-Ar-Si nanofibers. In contrast, PMMA/Ar 0.1–1 hybrids showed lower values in the thermal and the mechanical profile depicting the combined effect of nanotube and aramid in electrospun nanofibers.

Improved electrical conductivity of very long multi-walled carbon nanotube bundle/poly (methyl methacrylate) composites

Carbon ◽  
2011 ◽  
Vol 49 (6) ◽  
pp. 2127-2133 ◽  
Author(s):  
Jun Seop Kim ◽  
Shin Je Cho ◽  
Kwang Seok Jeong ◽  
Young Chul Choi ◽  
Mun Seok Jeong
Keyword(s):  
Electrical Conductivity ◽  
Carbon Nanotube ◽  
Methyl Methacrylate ◽  
Poly Methyl Methacrylate ◽  
Multi Walled Carbon Nanotube ◽  
Nanotube Bundle

scholarly journals Mechanical Improvement of Multi-Walled Carbon Nanotube/Poly (Methyl Methacrylate) Composites

2005 ◽  
Vol 297-300 ◽  
pp. 2545-2550 ◽  
Author(s):  
Hyun Chul Kim ◽  
Sang Eui Lee ◽  
Chun Gon Kim ◽  
Jung Ju Lee
Keyword(s):  
Carbon Nanotube ◽  
Methyl Methacrylate ◽  
Fiber Composites ◽  
Short Fiber ◽  
Reinforced Composites ◽  
Short Fibers ◽  
Sem Images ◽  
Poly Methyl Methacrylate ◽  
Multi Walled Carbon Nanotube ◽  
Loading Tests

Multi-walled carbon nanotube (MWNT)/poly (methyl methacrylate) composites were fabricated with the variation of the concentration rate of nanotubes by the solution casting. SEM images showed that the nanotubes were dispersed well throughout PMMA. Assuming that MWNTs in MWNT/PMMA composites were randomly oriented, the Tsai-Pagano equation, which can give the moduli of short fiber reinforced composites, was used to evaluate that of the MWNT/PMMA composite. For investigating mechanical properties of the MWNT/PMMA composite, tensile loading tests were performed, varying the concentration rate of the MWNTs. For each concentration rate of the MWNTs, at least 5 specimens of MWNT/PMMA composites were made and tested. As the concentration rate of the MWNTs increased from 0 to 0.15wt%, tensile strength and modulus of the MWNT/PMMA composites were improved by about 20% and 32%, respectively. However, the experimental results were not in agreement with what we estimated. Here are two reasons supposed. First, the MWNTs used in this research were not stretched straightly but entangled. It means that MWNTs cannot be assumed to be short fibers. Second, the concentration rate of the MWNTs is too small to be considered as short fiber composites.

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