Mechanical and physical properties of epoxy resin based nanocomposites reinforced with polyamine functionalized carbon nanotubes

Abstract

This article concerns the effect of polyamine functionalized carbon nanotubes (CNT, 0.4 wt%) used as filler in epoxy based nanocomposites on their mechanical and physical features. The functional chains present on CNT, containing one, three, or five amino groups, were bound in similar molar amount on the CNT external walls, as verified by characterization tests. Mechanical and physical properties of the nanocomposites were investigated by means of flexural, wet ability, calorimetric, morphologic, and electrical measurements. Experimental results highlighted that the presence of the amino groups attached on the CNT improves both their dispersion and chemical interaction with the matrix. Both these factors enhance the mechanical strength, deformability and wet ability of the nanocomposites compared to the neat resin which retains its thermal stability. The highest enhancement in maximum flexural strength and elongation at break (of 131% and of 1110%, respectively) was observed in the nanocomposite containing the penta-amino chain while the glass transition temperature value increased of 27%. POLYM. COMPOS., 37:1007-1015,

Investigation on cure kinetics of epoxy resin containing carbon nanotubes modified with hyper-branched polyester

“…The values of both y(a) and z(a) functions normalized within (0, 1) intervals are given by the following equations: y s ðaÞ ¼ yðaÞ max½yðaÞ (11) z s ðaÞ ¼ zðaÞ max½zðpÞ (12) According the shape and the maximum of both y s (a) and z s (a) functions, the most suitable kinetic model can be determined among several models and subsequently the kinetic parameters such as n and m can be calculated. Fig.…”

“…Recently, the introduction of inorganic llers is found to be an efficient way to improve the toughness of epoxy resin without sacricing other properties. [8][9][10][11][12][13] The multi-walled carbon nanotubes (CNTs) are ideal llers for polymer composites due to their high Young's modulus as well as good electrical and thermal conductivity. 9,[14][15][16][17] The addition of a small amount of CNTs can strongly improve the electrical, thermal and mechanical properties of the polymer matrix, resulting in the composites with good processability, balanced stiffness and toughness as well as other functional properties.…”

Effect of structure regulation of hyper-branched polyester modified carbon nanotubes on toughening performance of epoxy/carbon nanotube nanocomposites

“…5,7,[9][10][11] Through the introduction of inorganic llers to improve the toughness of epoxy resin without sacricing other properties has been found recently. 9,[12][13][14] The multi-walled carbon nanotubes (MWCNTs) are ideal llers for polymer composites due to their high Young's modulus as well as good electrical and thermal conductivity. 5,8,[15][16][17] Once added with a small amount of MWCNTs, the electrical, thermal and mechanical properties of the polymer matrix can be strongly improved, resulting the composites with good processability, such as balanced stiffness, toughness and other functional properties.…”

“…However, due to their insolubility, non-melting, easy to tangle and agglomerate, and lack of surface functional groups, carbon nanotubes are difficult to process, as well as poor dispersibility and stability, poor compatibility with epoxy matrix materials limiting their application areas. 14,[18][19][20][21] An effective way to improve the dispersion and interfacial bonding properties of carbon nanotubes in epoxy matrix is surface chemical modication of carbon nanotubes. 5,13,15,22 Jin et al 23 acidied P-MWCNTs (pure carbon nanotubes) to obtain A-MWCNTs (acidied carbon nanotubes).…”

Hybridizing MWCNT with nano metal oxides and TiO2 in epoxy composites: Influence on mechanical and thermal performances

“…However, these particles influence mechanical properties of polymer composites. [9][10][11][12][13] Nowadays, many researches have been done on the mechanical and physical characteristics of CNT-based nanocomposites. 14,15 There are some researches on the effect of CNT, its functionalization, and dispersion on thermal conduction of polymers.…”