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*Corresponding author: [email protected]
3
Self-Healable Elastomers
Mariajose Cova Sánchez 1 , Daniela Belén García 2 , Mariano Martin Escobar 2,3 * and Marcela Mansilla 3
1 Departamento de Asistencia a la Industria del Caucho, Instituto Nacional de Tecnología Industrial, Buenos Aires, Argentina
2 Departamento de Diseño de materiales, Instituto Nacional de Tecnología Industrial, Buenos Aires, Argentina
3 INTI, CONICET, Departamento de Diseño de Materiales, Buenos Aires, Argentina
Abstract
The chapter is divided in three sections: the first one is an introduction about the characteristics of self-healing in elastomers; the second one included the characterization methods of healing ability. The last section consists on a review of self-healing in particular cases of different elastomer matrices, such as: natural rubber (NR), styrene butadiene rubber (SBR), polybutadiene rubber (BR), bromobutyl rubber (BIIR), silicones and polyurethane (PU).
Keywords: Healing, rubber, disulfide, hydrogen bonding, diels–alder
3.1 Introduction
Elastomers are elastic polymers that are highly flexible. They are used in a huge number of applications, such as tires, seals, biomaterials, soft robotics, wearable electronic devices and sensors. Elastomer compounds present excellent mechanical properties due to the formation of a stable three dimensional network of covalent bonds in the vulcanization process, but make the material not or almost not self-healable due to the irreversibility of the covalent bonds. Actually, the rubber industry looks for new challenges to contribute to sustainable development. Consequently, it is necessary to develop sustainable materials and methods in order to extend the life cycle of vulcanized elastomers [1]. An alternative to reach this goal is the concept of self-healable elastomeric compounds.
Self-healable