SiC dispersed polysulphide epoxy resin based functionally graded material

Abstract

Gravity and centrifugal castings are considered the most economical and attractive processes for making functionally graded materials (FGMs). The control on property change in radial direction in aforesaid methods is mainly based on the initial concentration, viscosity, time, centrifugal force, particle size, and density difference in dispersed and dispersion medium as per Stoke's law. The modified Stoke's law in the form of HD model that takes into account the intrinsic changes in viscosity those occur during the polymerization of resins, was used for determining changes in concentration with time at different locations of test samples for SiC dispersed poly sulphide epoxy resin FGM. The experiments as well as simulation were conducted under gravity as well as centrifugal force. The simulated results are in good agreement with those of experiments. The process parameters, initial concentration, etc., can be selected for a desired concentration profile of FGM.

Density graded polymer composite foams

“…as presented in Figure 2. 59,60 A list of the most important works on density graded polymer composites is presented next.

Figure 2.Schematic representation of unfilled (left), homogeneous (middle) and graded composites (right). 59,60

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“…Schematic representation of unfilled (left), homogeneous (middle) and graded composites (right). 59,60 …”

Effect of Kaolin powder on the static and dynamic behavior of heterogeneous laminate constituted of functionally graded material layers

“…[19][20][21][22][23] The functional gradient structure concept has been applied to polymer matrix composites. Glass, 24 silicon carbide, 25,26 carbon fiber, [26][27][28] and other polymers such as polyurethane 29 have been used to make functionally graded epoxy-based composites. Functionally graded ceramic and metallic nanocomposites have also been manufactured using nanoscale reinforcements.…”

Processing method, properties and application of functionally graded polymer materials based on the mixtures of poorly compatible epoxy resins

“…26 Functionally graded composites based on silicon carbide-polysulfide epoxy resin were developed using gravity sedimentation as well as centrifugation methods. 27 These methods allow to achieve predetermined gradient of filler distribution as well as to control it. 28 However, the low achievable content of fillers is the main challenge of these technologies as the viscosity of the composition rises with increase of filler concentration.…”