2024

Vol.31 No.3

Editorial Office

Review

  • Journal of the Microelectronics and Packaging Society
  • Volume 28(2); 2021
  • Article

Review

Journal of the Microelectronics and Packaging Society 2021;28(2):51-57. Published online: Mar, 18, 2022

Study on the Thermomechanical Properties of Epoxy-Silica Nanocomposites by FTIR Molecular Structure Analyses

  • SeoHyun Jang1, Yusu Han1, DoSoon Hwang2, Juwon Jung2, YeongKook Kim3,†
    1Department of Mechanical Engineering, Inha University, 100 Inha-ro, Nam-gu, Incheon, Korea 2Korea Aerospace Research Institute, Daejun, Korea 3Department of Mechatronics Engineering, Inha University, 100 Inha-ro, Nam-gu, Incheon, Korea
Corresponding author E-mail: ykkim@inha.ac.kr
Abstract

이 연구에서는 에폭시 수지에 포함된 나노 실리카 입자의 농도가 재료의 열/기계적 물성에 미치는 영향에 대 해 알아보았다. 약 12 nm 크기의 나노 입자를 에폭시 수지에 다섯가지 무게비로 섞은 나노복합소재를 제작하였다. DMA 와 TMA 방법을 이용하여 유리전이온도, 응력이완, 열팽창 거동을 측정하였다. 이를 통해 나노입자가 재료의 점탄성 거 동에 어떠한 영향을 미치는지 보였다. 실리카 입자의 함량이 증가할수록 순수 에폭시 재료 대비 탄성 물성은 증가하였고, 유리전이온도는 감소하였다. FTIR 결과는 분자구조의 관점에서 충진제 함량에 따른 물성변화의 원인을 찾고 나노입자가 에폭시 분자 구조에 어떠한 영향을 미치는지를 규명하는데 중요한 역할을 하였다.
This paper analyzed the effects of the concentration of nano-silica particles contained in epoxy resin on the thermomechanical properties of the composite materials. The 12nm sized nanoparticles were mixed with epoxy polymer by 5 different weight ratios for the test samples. The glass transition temperature, stress relaxation, and thermal expansion behaviors were measured using dymanic mechanical analyzer (DMA) and thermomechanical analyzer (TMA). It was shown that the nano particle mixing ratios had significant influences on the viscoelastic behaviors of the materials. As the content of the silica particles was increased, the elastic modulus was also increased, while the glass transition temperatures were decreased. Fourier Transform Infrared Spectroscopy (FTIR) results played an important role in determining the causes of the property changes by the filler contents in terms of the molecular structures, enabling the interpretations on the material behaviors based on the chemical structure changes.

Keywords Epoxy, Nano Composite, Material Properties, Viscoelasticity