화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.29, No.2, 166-171, March, 2005
Export Citation
열노화가 EPDM/실리콘 고무 블렌드의 물성에 미치는 영향
Influence of Thermal Aging on the Properties of EPDM/Silicone Rubber Blends
정유경, 이성구, 조봉래1, 최길영†
  • 한국화학연구원 신뢰성평가센터
  • 1고려대학교 화학과
Yu-Kyoung Chung, Sung-Goo Lee, Bong Rae Cho1, and Kil-Yeong Choi†
  • Reliability Assessment Center, Korea Research Institute ofChemical Technology, Daejeon 305-600, Korea
  • 1Department of Chemistry, Korea University, Seoul 136-701, Korea
E-mail:
초록
EPDM(ethylene propylene diene monomer)/실리콘 고무 블렌드를 제조하고, 상용화제와 열노화 시간에 따른 물성 변화를 살펴보았다. EPDM과 실리콘 고무(SR)의 조성비는 90/10에서 10/90 wt% 사이로 조절하였으며, Brabender사의 Plasticoder를 사용하여 용융 혼합하고, 열프레스로 가교하였다. 가교된 EPDM/SR 블렌드의 모폴로지를 주사전자현미경으로 관찰하였다. 또한, 블렌드를 100 ℃에서 24, 48, 96시간 동안 열노화시켜 경도, 인장 강도, 신장률 및 접촉각을 측정하였다. 모폴로지를 조사한 결과 상용화제를 첨가한 블렌드의 분산상의 크기가 감소하였다. 열노화 시간이 증가함에 따라, 블렌드의 경도와 인장 강도는 감소하였으며, 신장률과 접촉각은 증가하였다.
EPDM (ethylene propylene diene monomer)/silicone rubber blends were prepared and the influence of a compatibilizer and thermal aging on the properties of the blends was investigated. The blends of which the compositions were varied in the range of 90/10 through 10/90 wt% were mixed by using a Brabender Plasticoder (internal mixer) and were vulcanized by a hot press. The morphology of the vulcanized EPDM/SR blends was examined by scanning electron microscopy (SEM). After the thermal Aging for 24, 48, 96 hrs at 100 ℃ in an air oven, hardness, tensile strength, elongation and contact angle of the blends were investigated. From the result of the morphology, it was confirmed that the domain size of the blends containing the compativilizer was reduced. As the increase of the thermal aging time, hardness and tensile strength of the blends decreased but elongation and contact angle increased.
Keywords:EPDM;silicone rubber;compatibilizer;thermal aging;MAH-g-EPDM
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