Effects of amino‐functionalized carbon nanotubes on the properties of amine‐terminated butadiene–acrylonitrile rubber‐toughened epoxy resins

Abstract

Amino-functionalized multiwalled carbon nanotubes (MWCNT-NH 2 s) as nanofillers were incorporated into diglycidyl ether of bisphenol A (DGEBA) toughened with amine-terminated butadiene-acrylonitrile (ATBN). The curing kinetics, glasstransition temperature (T g ), thermal stability, mechanical properties, and morphology of DGEBA/ATBN/MWCNT-NH 2 nanocomposites were investigated by differential scanning calorimetry (DSC), thermogravimetric analysis, a universal test machine, and scanning electron microscopy. DSC dynamic kinetic studies showed that the addition of MWCNT-NH 2 s accelerated the curing reaction of the ATBN-toughened epoxy resin. DSC results revealed that the T g of the rubber-toughened epoxy nanocomposites decreased nearly 10 C with 2 wt % MWCNT-NH 2 s. The thermogravimetric results show that the addition of MWCNT-NH 2 s enhanced the thermal stability of the ATBN-toughened epoxy resin. The tensile strength, flexural strength, and flexural modulus of the DGEBA/ATBN/MWCNT-NH 2 nanocomposites increased increasing MWCNT-NH 2 contents, whereas the addition of the MWCNT-NH 2 s slightly decreased the elongation at break of the rubber-toughened epoxy.

Brucite modified epoxy mortar binders: Flame retardancy, thermal and mechanical characterization

“…However, results reported by others shows that the addition of 10 wt% Mg(OH) 2 leads to a slight decrease of T g value (4°C) [26]. It is well known that the effects of the presence of fillers on the T g of polymer matrix is related to the rigid phase reinforcement and crosslinking network of the thermosetting polymer matrix [27][28][29]. Unlike the halogen-free reactive flame retardant, DOPO [30], the addition of brucites has negligible influence on the crosslinking networks of epoxy resin.…”

Preparation of binary and hybrid epoxy nanocomposites containing graphene oxide and rubber nanoparticles: Fracture toughness and mechanical properties

“…10,11 To achieve further improvement in the fracture toughness without a sacrifice in other desirable properties, the simultaneous addition of rubber and rigid particles, especially on the nanoscale, into the epoxy resin has been proposed. 12,13 In this regard, the use of soft rubber particles in combination with nanoclay, 14 nanosilica, 15 and carbon nanotubes 16 has been reported, although these different studies did not achieve the same result from the view of improving the fracture toughness of the hybrid system in comparison to their corresponding binary composites. [17][18][19][20][21] For instance, Marouf et al 17 reported that the fracture toughness of a hybrid epoxy modified with clay and rubber nanoparticles was lower than that of its binary composite counterparts.…”

Synergistic Effect of Functionalized Carbon Nanotubes and Micron‐Sized Rubber Particles on the Mechanical Properties of Epoxy Resin

“…The marginal improvement in properties was attributed to the presence of fCNT agglomerates in the sample due to inefficient mixing. Similarly, Zhang et al reported that addition of amine fCNT to RTE led to marginal increase in tensile strength and flexural strength, by 14% and 10%, respectively. However, Huang et al demonstrated significant improvement in fracture toughness of epoxy with addition of liquid‐rubber‐functionalized graphene and use of highly efficient mixing protocols (ultrasonication + three roll mill calendaring) while only moderate improvement was noticed with non‐functionalized graphene processed under similar conditions.…”