Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Preparation of Cladding Polymers for Heat Resistant Plastic Optical Fiber(I) -Methyl Methacrylate/Fluoroalkyl Methacrylate Copolymers-

고내열 POF용 클래딩 재료 제조(I) -Methyl Methacrylate/Fluoroalkyl Methacrylate 공중합체-

  • Jung, Min-Jin (Department of Applied Chemical Engineering and Center for Photonic Materials & Devices, Chonnam National University) ;
  • Kim, Young-Fil (Department of Applied Chemical Engineering and Center for Photonic Materials & Devices, Chonnam National University) ;
  • Kim, Jin-Bong (Department of Applied Chemical Engineering and Center for Photonic Materials & Devices, Chonnam National University) ;
  • Lee, Moo-Sung (Department of Applied Chemical Engineering and Center for Photonic Materials & Devices, Chonnam National University) ;
  • Jin, Moon-Young (Advanced Materials Division, Korea Research Institute of Chemical Technology) ;
  • Park, Min (Polymer Hybrids Research Center, Korea Institute of Science and Technology)
  • 정민진 (전남대학교 응용화학공학부.광소재부품연구소) ;
  • 김영필 (전남대학교 응용화학공학부.광소재부품연구소) ;
  • 김진봉 (전남대학교 응용화학공학부.광소재부품연구소) ;
  • 이무성 (전남대학교 응용화학공학부.광소재부품연구소) ;
  • 진문영 (한국화학연구원 화학소재연구부) ;
  • 박민 (한국과학기술연구원 고분자하이브리드센터)
  • Published : 2003.08.01
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Abstract

The effect of the length of fluoroalkyl substituents on the refractive index (n) and glass transition temperature (T$_{g}$) of methyl methacrylate (MMA)-fluoroalkyl methacrylate (FAMA) copolymers (poly(MMA/FAMA)) was investigated. The copolymers were solution-polymerised in order to prepare cladding materials for plastic optical fiber (POF). The copolymer composition, T$_{g}$, and refractive index (n) of the copolymers were determined using $^1$H-NMR spectroscopy, differential scanning calorimeter, and prism coupler, respectively. As the length of fluoroalkyl units in FAMA and the content of FAMA in poly (MMA/FAMA) increased, the T$_{g}$ and n decreased monotonically. This indicates that although the copolymerization of MMA and FAMA is effective in controlling the n of cladding materials, the decrease in T$_{g}$, is inevitable. The interfacial instability between PMMA and MMA-trifluoroethyl methacrylate (TFEMA) copolymers, observed during annealing at 17$0^{\circ}C$, was greater at higher TFEMA contents. The observation was interpreted in terms of the solubility parameter concept combined with the Flory-Huggins interaction parameter.rameter.

Keywords

References

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