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Recently, graphene has attracted both academic and industrial interest because it can produce a dramatic improvement in properties at very low filler content. This review will focus on the latest studies and recent progress in the swelling resistance of rubber compounds due to the addition of graphene and its derivatives. This work will present the state-of-the-art in this subject area and will highlight the advantages and current limitations of the use of graphene for potential future researches.

The microcellular foam injection molding process is being widely applied by the thermoplastics industry. This process consists in a melted polymer injection mixed with a processing solvent, that is an inert gas in the supercritical state, usually CO2 or N2 producing a microcellular foam. This technique offers many advantages such as weight reduction, dimensional uniformization and less warpage. Besides that, it offers a satisfactory property like acoustic and thermal insulation. On the other hand, the parts from this process have an inferior mechanical property like ductility and toughness if compared with solid injection molded parts. Nevertheless, the main issue for this process is the poor appearance quality. This paper presents a review of some existing methods for surface quality improvement as Co-injection process, where a skin is injected over the microcellular part, and Heat & Cool that consists in a control of mold temperature.