Monitoring Network and Interfacial Healing Processes by Broadband Dielectric Spectroscopy: A Case Study on Natural Rubber
Broadband dielectric spectroscopy (BDS) is introduced as a new and powerful technique to monitor network and macroscale damage healing in an elastomer. Forthe proof of concept, a partially cured sulfur-cured natura lrubber (NR) containing reversible disulfides as the healingmoiety was employed. The...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2016 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/342224 |
| Acceso en línea: | http://hdl.handle.net/10261/342224 |
| Access Level: | acceso abierto |
| Palabra clave: | broadband dielectric spectroscopy polymer network healing interfacial healing natural rubber intrinsic healing Disulfide |
| Sumario: | Broadband dielectric spectroscopy (BDS) is introduced as a new and powerful technique to monitor network and macroscale damage healing in an elastomer. Forthe proof of concept, a partially cured sulfur-cured natura lrubber (NR) containing reversible disulfides as the healingmoiety was employed. The forms of damage healed and monitored were an invisible damage in the rubber network dueto multiple straining and an imposed macroscopic crack. The relaxation times of pristine, damaged, and healed samples were determined and fitted to the Havriliak−Negami equation to obtain the characteristic polymer parameters. It is shown that seemingly full mechanical healing occurred regard less the type of damage, while BDS demonstrates that the polymer architecture in the healed material differs from that in the original one. These results represent a step forward in the understanding of damage and healing processes in intrinsic self-healing polymer systems with prospective applications such ascoatings, tires, seals, and gaskets. |
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