Composites Research

The Korean Society for Composite Materials (한국복합재료학회)
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Evaluation of Bond Performance of Self-Healing Agents Using Single lap Shear Test

Single Lap 전단시험을 적용한 자가치료제의 접착성능 평가

  • 윤성호 (금오공과대학교 기계공학부) ;
  • 박희원 (금오공과대학교 기계공학부 대학) ;
  • 허광수 (금오공과대학교 기계공학부 대학원)
  • Published : 2004.08.01
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Abstract

A single lap shear test was used to investigate the effects of the ratio of a catalyst to a self-healing agent and curing temperature on the bond performance of autonomic polymer composites. DCPD (dicyclopentadiene), ENB (5-ethylidene-2-norbornene), and their mixture were used as self-healing agents and bis(triclohexylphosphine) benzyllidine ruthenium (IV) dichloride Grubbs' catalyst was used as a catalyst. During the experiments, the catalyst ratios of 1.0wt% and 0.5wt% were applied to DCPD, the catalyst ratio of 0.lwt% was applied to ENB, and the catalyst ratio of 0.5wt% was applied to the mixtutes of DPCD and ENB. In addition, the curing temperatures of $25^{\circ}C$, $60{\circ}C$, and $80^{\circ}C$ were considered. According to the results, the higher catalyst ratio and the longer curing time were required to obtain more stabilized bond shear strength of DCPD. ENB with a lower catalyst ratio was cured faster than DCPD. Unlike DCPD, ENB stabilized after a steady fall from its peak as the curing time increased. Moreover, the mixtures of DCPD and ENB revealed similar curing behavior to ENB, but the increase in mixture ratio of ENB to DCPD caused curing process to be faster. Also the increase in curing temperature caused the bond shear strength to be higher and the curing time to be quicker.

본 연구에서는 single lap 전단시험을 통해 자가치료제와 촉매의 혼합비율 및 경화온도가 자가치료용 폴리머 복합재에 적용되는 자가치료제의 접착성능에 미치는 영향을 조사하였다. 자가치료세로는 DCPD (dicyclopentadiene), ENB(5-ethylidene-2-norbornene), DCPD와 ENB가 혼합된 경우를 고려하였으며 촉매로는 bis(riclohexylphosphine) benzyllidine rethenium (IV) dichloride Grubbs' catalyst를 사용하였다. 이때 DCPD에 대한 촉매의 혼합비율은 1.0wt%와 0.5wt%, ENB에 대한 촉매의 혼합비율은 0.lwt%, DCPD와 ENB의 혼합액에 대한 촉매의 혼합비율은 0.5wt%를 적용하였으며 경화온도는 $25^{\circ}C$, $60{\circ}C$, $80^{\circ}C$를 고려하였다. 연구결과에 따르면 DCPD의 경우 안정화된 접착강도를 얻기 위해서는 많은 양의 촉매와 긴 경화시간이 요구되었다 ENB의 경우는 DCPD의 경우에 비해 촉매의 혼합비율이 낮아도 빠른 경화반응을 얻을 수 있었지만 경화시간이 증가함에 따라 접착전단강도는 DCPD와는 달리 최대 값에 도달하였다가 점차 감소하면서 안정화되는 양상을 나타내었다. DCPD와 ENB의 혼합액 경우도 ENB와 유사한 경화거동을 나타내며 DCPD에 대한 ENB의 혼합비율이 높을 수록 경화반응이 빨라지는 양상을 얻을 수 있었다. 아울러 경화온도가 높을수록 집착전단강도는 증가되며 안정화된 평탄부에 도달하는 경화시간은 짧아짐을 알 수 있었다

Keywords

References

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