Design & Manufacturing

Korean Society of Die & Mold Engineering (한국금형공학회)
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Manufacturing Fiber-Reinforced Composite Materials Based on PLA (Poly L-Lactide) Resin Using In-Situ Polymerization and Molecular Weight Measurement Using GPC

현장 중합을 이용한 PLA(Poly L-Lactide) 수지 기반 섬유 강화 복합 재료 제조 및 GPC를 이용한 분자량 측정

  • Seon-Ju Kim (Department of Mechanical Engineering, Korea University of Technology and Education) ;
  • Beom-Joo Lee (Department of Mechanical Engineering, Korea University of Technology and Education) ;
  • Hyeong-Min Yoo (Department of Mechanical Engineering, Korea University of Technology and Education)
  • 김선주 (한국기술교육대학교 기계공학과) ;
  • 이범주 (한국기술교육대학교 기계공학과) ;
  • 유형민 (한국기술교육대학교 기계공학과)
  • Received : 2023.09.20
  • Accepted : 2023.09.30
  • Published : 2023.09.30
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Abstract

The conventional FRP (Fiber Reinforced Plastic) manufacturing process used thermoset resins for ease of molding but faced the issue of non-recyclability. To address these shortcomings, a new process utilizing thermal plastic resin was developed. However, due to the high viscosity of thermal plastic resin, problems such as fiber deformation and a reduced fiber volume fraction occurred during the high-temperature, high-pressure process. In this study, to overcome the limitations of the conventional process, fiber-reinforced composite materials were manufactured through in-situ polymerization using PLA (Poly L-Lactide) resin in the VA-RTM (Vacuum Assistance Resin Transfer Molding) process. The fiber volume of the produced specimens was calculated, and resin impregnation and porosity were confirmed through optical microscopy. Additionally, molecular weight analysis using GPC (Gel Permission Chromatography) demonstrated improvements over the conventional process and emphasized the essential requirement of temperature control.

Keywords

Acknowledgement

본 연구는 정부(과학기술정보통신부)의 재원으로 한국연구재단의 지원을 받아 수행된 연구임 (과제번호 : NRF-2021R1G1A1006606)

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