Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Investigation on Microscopic Morphological Variation of Epoxy Adhesives by Dissipative Particle Dynamics Simulations

소산입자동역학을 이용한 에폭시 접착 소재 구성에 따른 미시적 모폴로지 분석

  • Joohee Choi (School of Chemical Engineering, Pusan National University) ;
  • Seung Geol Lee (School of Chemical Engineering, Pusan National University)
  • 최주희 (부산대학교 응용화학공학부) ;
  • 이승걸 (부산대학교 응용화학공학부)
  • Received : 2023.10.19
  • Accepted : 2023.12.12
  • Published : 2023.12.31
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Abstract

Epoxy structural adhesives are widely used in various industries due to their excellent chemical resistance, thermal properties, high electrical insulation performance, increased joint stiffness, and potential for lightweighting in structural components. While the performance of epoxy adhesives is influenced by various factors such as chemical structures and compositions, it is challenging to analyze the structural morphology of epoxy adhesives at the molecular level. Therefore, in this study, we investigated macroscopic structural changes in epoxy adhesive materials based on the changes of components using dissipative particle dynamics (DPD) simulations. By calculating DPD parameters and simulating the degree of affinity interaction between the epoxy components, we represented the morphological characteristics according to their chemical structure. Through DPD simulations, we analyzed the number density, density field distribution, and diffusion coefficient of structure for each epoxy compositions, revealing that 3,3'-diamino diphenyl sulfone (3,3'-DDS) strongly interact with triglycidyl aminophenol (TGAP) and diglycidyl ether of bisphenol A (DGEBA), and polyether sulfone (PES) has repulsive interaction with TGAP, resulting in significant phase separation.

Keywords

Acknowledgement

이 과제는 부산대학교 기본연구지원사업(2년)에 의하여 연구되었음.

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