Thermal Stability of Grubbs Catalyst and Its Reactivity with Self-healing Agents

• Journal title : Composites Research
• Volume 28, Issue 6,  2015, pp.395-401
• Publisher : The Korean Society for Composite Materials
• DOI : 10.7234/composres.2015.28.6.395
Title & Authors
Thermal Stability of Grubbs Catalyst and Its Reactivity with Self-healing Agents
Yoon, Sung Ho; Shi, Ya Long; Feng, Jun; Jang, Se Yong;

Abstract
This study investigated the thermal stability of Grubbs catalyst and its reactivity with self-healing agents for self-healing damage repair. Four types of Grubbs catalyst supplied by manufacturers were considered and each catalyst was tested in as-received and grinded conditions. Four types of self-healing agents were prepared by varying the mixing ratio of dicyclopentadiene (DCPD) and 5-ethylidene-2-norbonene (ENB). Heat flows as a function of temperature were measured through a differential scanning calorimetry (DSC) to determine the thermal stability of catalysts. Reaction heats of self-healing agents with the catalyst were measured to evaluate the reactivity of the catalyst. For this evaluation, Fluka Chemika Grubbs` catalyst was used based on the maximum temperature and the time to reach the maximum temperature. According to the results, catalysts had different shapes depending on the manufacturer and the results showed that the smaller the size of the catalyst the higher the reactivity with self-healing agents. As the ENB ratio in self-healing agents increased, the maximum temperature increased, and the time to reach the maximum temperature decreased. As the amount of the catalyst increased, the maximum temperature increased, and the time to reach the maximum temperature decreased. Considering the thermal stability of the catalyst and its reactivity with the self-healing agent, combination of 0.5 wt% catalyst and the D3E1 self-healing agent was optimal for self-healing damage repair. Finally, as the thermal decomposition may occur depending on the environmental temperature, the catalyst must not be exposed to temperature higher than that is necessary to maintain the thermal stability of the catalyst.
Keywords
Self-healing damage repair;Catalyst;Self-healing agent;Thermal stability;Reaction heat;
Language
Korean
Cited by
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