抄録
An advanced self-healing polymer composite with shape recovery function was proposed. The composite consists of continuous aramid fiber having thermal contraction ability and epoxy resin in which, microencapsulated dicyclopentadiene (DCPD) as healing agent and Grubbs catalyst are dispersed. The thermal contraction of the fiber with self-healing reaction heat allows the polymer composite to shape-recovery and to close crack. In this study, the exothermic behavior of self-healing reaction by DCPD was investigated and the effect of shape-recovery on exothermal behavior was discussed. The polymerization reaction heat of DCPD with Grubbs catalyst was measured by isothermal calorimetry. For the polymerization, maximum reaction heat was about 800mW/g at surrounding temperature 60℃. While they were 800mW/g and 500mW/g with DCPD 1.1 mL and 0.2, 0.6mL, respectively at surrounding temperature 40℃. Using the result, the heat transfer of the composite was simulated by finite element analysis and it is found to exhibit a proportional relationship between branched crack length and thermal contraction with a fiber. Therefore, the crack length needed for shape-recovery can be expected. That is, it is suggested that the voluntary shape-recovery materials are allowed to design by controlling interlayer between fiber and matrix.
