Tribological performance and thermal behavior of epoxy resin nanocomposites containing polyurethane and organoclay

Abstract

A series of epoxy resin nanocomposites modified by polyurethane and organically modified montmorillonite was prepared by effectively dispersing the organically modified montmorillonite in interpenetrating polymer networks (IPNs) of epoxy and polyurethane via the sequential polymeric technique and in situ polymerization. The tribological performance of the resultant EP/PU nanocomposites was investigated by a pin-on-disc tester, and the results showed that adding polyurethane and organically modified clay to the EP matrix had a synergistic effect on improving tribological performance of EP/PU nanocomposites. The morphologies of the worn surface were studied by scanning electron microscopy (SEM) observations, and the results indicated that the mechanism of improving tribological performance of EP/PU nanocomposites was different from that of pure EP or pure EP/PU IPNs. The thermal behavior of these nanocomposites was also investigated by thermogravimeric analysis (TGA), and the results indicated that adding organically modified clay to the matrix remedied the deterioration of the thermal degradation temperature of the interpenetrating networks.

Development of ricehusk ash reinforced bismaleimide toughened epoxy nanocomposites

“…The wide spread uses and properties of epoxy resin have been extensively studied by our research group for the past two decades (Dinakaran et al, 2003; Rajasekaran and Alagar, 2007; Premkumar et al, 2008; Ramesh et al, 2010; Selvaganapathi et al, 2010; Chandramohan and Alagar, 2011; Vengatesan et al, 2011; Kanimozhi et al, 2013; Prabunathan et al, 2013). In the present study an attempt has been made to form a covalent bond between organic polymers and inorganic components through coupling agent to enhance the compatibility of components involved (Farhadyar et al, 2005; Bagherzadeh and Mahdavi, 2007; Xinghong et al, 2007; Qingming et al, 2008; Balamurugan and Kannan, 2010; Sea-Fue et al, 2010). …”

Friction and Wear Behaviors of Two Kinds of Hydroxyl-Terminated Polydimethylsiloxane-Modified PU/EP IPN Composites Under Dry Sliding Conditions

“…However, EP is not an effective materials used for tribological applications because it can-not withstand high mechanical and tribological loads [5,6]. Thus, different kinds of modifiers have been added to EP, among them carbon fibers [7], carbon nanotubes [8,9], Kevlar pulp [6], and SiC nanoparticles [10] which successfully improved its tribological properties.…”

Combined effect of fibers and PTFE nanoparticles on improving the fretting wear resistance of UHMWPE-matrix composites

“…Usually, two or more fillers reinforcement systems could provide better comprehensive performance compared with single filler system. [15][16][17][18] It has drawn much attention to the development of hybrid composite systems. Generally, the incorporation of both particle and fiber is to offer a synergetic reinforcing effect to the matrix and assist in developing a uniform-protecting transfer film on the abrasive counterface, which leads to the improvement of the loadcarrying capacity and tribological properties.…”

“…The tribological properties of UHMWPE composites can be greatly improved with the incorporation of some micro/nano scale fillers (such as carbon fiber, ZnO, charcoal powder, HDPE, and carbon nanotube). Usually, two or more fillers reinforcement systems could provide better comprehensive performance compared with single filler system . It has drawn much attention to the development of hybrid composite systems.…”