Ghazali, Habibah published the artcileMicroencapsulated healing agents for an elevated-temperature cured epoxy: Influence of viscosity on healing efficiency, SDS of cas: 7575-23-7, the main research area is cured epoxy resin microencapsulated healing agent viscosity.
Elevated-temperature cured epoxy resins are widely used for high-performance applications especially for structural adhesive and as a matrix for structural composites. This is due to their superior chem. and mech. properties. The thermosetting nature of epoxy produces a highly crosslinked polymer network during the curing process where the resulting material exhibited excellent properties. However, due to this crosslinked mol. structure, epoxies are also known to be brittle, and once a crack initiated in the material, it is difficult to arrest the crack propagation. Earlier research found that the inclusion of encapsulated healing agents is able to introduce self-healing ability to the room-temperature cured epoxies. The current study investigated the self-healing behavior of an elevated-temperature cured epoxy, which incorporated the dual-capsule system loaded with bisphenol A diglycidyl ether (DGEBA) resin and mercaptan. The microcapsules were prepared by the in-situ polymerization method while the fracture toughness and the self-healing capability of the tapered-double-cantilever-beam (TDCB) epoxy specimens were measured under Mode-I fracture toughness testing. We investigated the effect of temperature on viscosity of the healing agents and how these values influence the formation of uniform healing on the fracture surfaces. It was found that incorporation of the dual-capsule self-healing onto an elevated-temperature cured epoxy slightly changed the fracture toughness of the epoxy as indicated by the Mode-I testing.
Polymers and Polymer Composites published new progress about Crack propagation. 7575-23-7 belongs to class alcohols-buliding-blocks, name is Pentaerythritol tetra(3-mercaptopropionate), and the molecular formula is C17H28O8S4, SDS of cas: 7575-23-7.
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