Polymer(Korea) (폴리머)

The Polymer Society of Korea (한국고분자학회)
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Cure Behavior and Tensile Properties of Ethylidene Norbornene/endo-Dicyclopentadiene Blends

Ethylidene Norbornene/endo-Dicyclopentadiene 블렌드의 경화 거동 및 인장 특성

  • Jung, Jong Ki (School of Energy and Integrated Materials Engineering, Kumoh National Institute of Technology) ;
  • Choi, Jung Hwa (School of Energy and Integrated Materials Engineering, Kumoh National Institute of Technology) ;
  • Yang, Guang (School of Energy and Integrated Materials Engineering, Kumoh National Institute of Technology) ;
  • Park, Jongmoon (School of Energy and Integrated Materials Engineering, Kumoh National Institute of Technology) ;
  • Kim, Donghak (School of Energy and Integrated Materials Engineering, Kumoh National Institute of Technology) ;
  • Kim, Seonggil (School of Energy and Integrated Materials Engineering, Kumoh National Institute of Technology) ;
  • Lee, Jong Keun (School of Energy and Integrated Materials Engineering, Kumoh National Institute of Technology) ;
  • Oh, Myung-Hoon (Department of Materials Science and Engineering, Kumoh National Institute of Technology) ;
  • Kim, Bongsuk (Thinker Route Co., LTD, Gumi Electronics & Information Technology Research Institute) ;
  • Bang, Daesuk (School of Energy and Integrated Materials Engineering, Kumoh National Institute of Technology)
  • 정종기 (금오공과대학교 에너지융합소재공학부) ;
  • 최정화 (금오공과대학교 에너지융합소재공학부) ;
  • 양광 (금오공과대학교 에너지융합소재공학부) ;
  • 박종문 (금오공과대학교 에너지융합소재공학부) ;
  • 김동학 (금오공과대학교 에너지융합소재공학부) ;
  • 김성길 (금오공과대학교 에너지융합소재공학부) ;
  • 이종근 (금오공과대학교 에너지융합소재공학부) ;
  • 오명훈 (금오공과대학교 신소재시스템공학부) ;
  • 김봉석 (씽크루트) ;
  • 방대석 (금오공과대학교 에너지융합소재공학부)
  • Received : 2015.01.28
  • Accepted : 2015.02.10
  • Published : 2015.05.25
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Abstract

Ethylidene norbornene (ENB) and its blends with endo-dicyclopentadiene (endo-DCPD) were prepared and reacted via the ring-opening metathesis polymerization (ROMP) reaction with the $1^{st}$ and $2^{nd}$ generation Grubbs' catalysts. Dynamic exothermic behaviors during ROMP and tensile properties after ROMP were evaluated using a differential scanning calorimeter (DSC) and a universal testing machine (UTM) for the samples, respectively. It revealed that the ROMP rate was accelerated with the less contents of endo-DCPD and under the $2^{nd}$ generation catalyst. Also, the addition of endo-DCPD and the $1^{st}$ generation catalyst resulted in higher tensile modulus and strength but lower toughness. Gel fraction measurement and fracture surface observation were made to understand the tensile properties.

Ethylidene norbornene(ENB)과 endo-dicyclopentadiene(endo-DCPD) 블렌드를 $1^{st}$ generation과 $2^{nd}$ generation Grubbs 촉매 하에서 ring-opening metathesis polymerization(ROMP)으로 제조하였다. ROMP 과정을 이해하기 위하여 시차주사열분석기(DSC)로 동적 발열거동을 분석하였으며, 반응 후 만능시험기(UTM)로 인장특성을 조사하였다. 반응속도는 endo-DCPD의 양이 적을수록 그리고 $2^{nd}$ generation 촉매 하에서 더 빨라졌다. 또한 endo-DCPD를 첨가할수록 그리고 $1^{st}$ generation 촉매 시스템에서 인장탄성률과 강도는 더 높은 값을 보였으나 강인성은 감소하였다. 이와 같은 인장특성의 변화를 젤 분율 측정과 파단면 관찰을 통하여 자세히 설명하였다.

Keywords

Acknowledgement

Supported by : 한국연구재단

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