Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Curing Effect on the Mechanical Properties of Ag Nanowire/UV Curable Polymer (NOA 68) Nanocomposites

UV 경화 폴리머(NOA 68)/은 나노와이어 복합재료의 기계적 특성 분석

  • Yeojin Kang (Department of Nano Fusion Technology, Pusan National University) ;
  • Dongjoo Kang (Department of Nano Fusion Technology, Pusan National University) ;
  • Won Jung Park (Department of Nano Fusion Technology, Pusan National University) ;
  • Jong-Man Kim (Department of Nano Fusion Technology, Pusan National University) ;
  • Dongyun Lee (Department of Nano Fusion Technology, Pusan National University)
  • 강여진 (부산대학교 나노융합기술학과) ;
  • 강동주 (부산대학교 나노융합기술학과) ;
  • 박원정 (부산대학교 나노융합기술학과) ;
  • 김종만 (부산대학교 나노융합기술학과) ;
  • 이동윤 (부산대학교 나노융합기술학과)
  • Received : 2024.08.29
  • Accepted : 2024.10.10
  • Published : 2024.10.27
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Abstract

In this study, a composite material suitable for flexible transparent electrodes was fabricated using Norland Optical Adhesive 68 (NOA 68), an ultraviolet (UV) curable polymer, and silver nanowires (Ag nanowire, AgNW). The mechanical behavior of this composite was then analyzed. A AgNW network structure was embedded in the NOA 68 polymer and cured using UV energy. The composite was prepared with an AgNW network structure formed approximately 4 ㎛ from the top of the NOA 68 matrix. Tensile test specimens were prepared according to ASTM standards, and tensile tests were conducted at room temperature in air. Scanning electron microscopy (SEM) and tensile tests were used to analyze the changes in mechanical behavior according to UV exposure time and the presence of AgNW. The results showed that as UV curing time increased, the yield strength of the composite increased while the elongation decreased. Regardless of the presence of the AgNW filler, the stress-strain curves of the ductile polymer exhibited the typical mechanical behavior of semi-crystalline polymers as UV curing time increased, characterized by strain softening. It was also confirmed that the composite impregnated with AgNW exhibited higher strength in response to changes in mechanical properties due to UV curing.

Keywords

Acknowledgement

This work was supported by a 2-Year Research Grant of Pusan National University.

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