화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Polymer(Korea), Vol.26, No.1, 88-97, January, 2002
Export Citation
Ortho-cresol Novolac 형 에폭시의 화학레올로지 특성에 미치는 아민 개질제의 영향
Effect of Aminosiloxane Modifier on Chemorheological Properties of Ortho-cresol Novolac Epoxy
김윤진, 안병길1, 김우년2, 서광석, 김환건3, 윤호규†
  • 고려대학교 재료공학과
  • 1요업기술원 신기능재료연구부
  • 2고려대학교 화공생명공학과
  • 3서경대학교 화학과
Yun Jin Kim, Byeng-gil Ahn1, Woo Nyun Kim2, Kwang S. Suh, Whan Gun Kim3, and Ho Gyu Yoon†
  • Department of Materials Science, Korea University, Korea
  • 1New Functional Materials Research Department, Korea Institute of Ceramic Engineering & Technology, Korea
  • 2Department of Chemical and Biological Engineering, Korea University, Korea
  • 3Department of Chemistry, Seokyeong University, Korea
E-mail:
초록
ortho-cresol novolac형 에폭시/페놀 경화제/triphenylphosphine 수지 시스템의 화학 레올로지 특성에 미치는 아민 실록산 개질제의 영향을 검토하였다. DSC 측정으로부터 아민 개질제에 의해 경화 속도와 전환량이 증가하였으며 유리전이온도의 증가도 관찰할 수 있었다. 또한, 저장 탄성률과 손실 탄성률의 교차점으로부터 구한 겔화 시간 및 임계 전환량의 감소를 확인할 수 있었다. 이것으로부터 등온 경화반응이 빠르게 진행됨으로써 점도가 상승하는 것을 알 수 있었다. 전환량의 함수로 얻어진 유리전이온도와 측정된 점도로부터 modified WLF 방정식에서의 C1 및 C2를 온도 함수로써 나타낼 수 있었으며, 유리전이온도와 C1 및 C2를 modified WLF 방정식에 적용함으로써 등온 경화반응에 따른 점도변화를 정확히 예측할 수 있었다.
The effect of aminosiloxane modifier on the chemorheological properties of ortho-cresol novolac epoxy/phenol novolac/triphenylphosphine resin system was investigated at different isothermal curing temperatures. By adding the aminosiloxane to the resin system, not only conversion rate and conversion were increased but also glass transition temperature was promoted. Critical conversion and gelation time obtained at the crossover point between storage and loss moduli were reduced and thus the viscosity was increased by the aminosiloxane. C1 and C2 in the WLF equation calculated from the glass transition temperature as a function of conversion and measured viscosity were found to vary with the curing temperature. By applying the change of glass transition temperature with conversion, C1 and C2 to WLF equation, it was possible to predict accurately the viscosity change with isothermal curing reaction.
Keywords:chemorheology;curing reaction;ortho-cresol novolac epoxy;aminosiloxane;modified WLF equation;glass transition temperature
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