Journal of Radiation Industry (방사선산업학회지)

Korean Society of Radiation Industry (한국방사선산업학회)
권호 표지

The Impact Properties and Wear Resistance of Polybutylene terephthalate (PBT) Cross-linked by Electron Beam Irradiation

전자선 가교된 PBT의 충격 특성 및 내마모 특성 연구

  • Shin, Bum Sik (Radiation Research Division for Industry and Environment, Korea Atomic Energy Research Institute) ;
  • Ko, Keum Jin (Radiation Research Division for Industry and Environment, Korea Atomic Energy Research Institute) ;
  • Jeun, Joon Pyo (Radiation Research Division for Industry and Environment, Korea Atomic Energy Research Institute) ;
  • Kim, Hyun Bin (Radiation Research Division for Industry and Environment, Korea Atomic Energy Research Institute) ;
  • Oh, Seung Hwan (Radiation Research Division for Industry and Environment, Korea Atomic Energy Research Institute) ;
  • Kang, Phil Hyun (Radiation Research Division for Industry and Environment, Korea Atomic Energy Research Institute)
  • 신범식 (한국원자력연구원 방사선공업환경연구부) ;
  • 고금진 (한국원자력연구원 방사선공업환경연구부) ;
  • 전준표 (한국원자력연구원 방사선공업환경연구부) ;
  • 김현빈 (한국원자력연구원 방사선공업환경연구부) ;
  • 오승환 (한국원자력연구원 방사선공업환경연구부) ;
  • 강필현 (한국원자력연구원 방사선공업환경연구부)
  • Received : 2011.05.23
  • Accepted : 2011.06.03
  • Published : 2011.06.30

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Abstract

Poly(butylenes terephthalate) have made large strides in applications of injection, extrusion, and molding material due to their excellent thermal resistance and appropriate mechanical properties. However, PBT was not hard polymer but a soft polymer which caused low absorption of external energy and the defect of being easily broken with the strong impact. Thus, the electron beam irradiation was carried out over a range of irradiation doses from 100 to 1,000 kGy for enhancing the properties. The decreases of $T_m$, $T_c$, and enthalpy were observed as increasing the absorbed dose in the results of DSC analysis. The improvement in the impact strength of PBT was clearly observed as the absorbed dose was increased. This was probably due to the 3-dimensional network structures, resulting in increasing the absorption of impact energy. In addition, the wear properties had increased at higher than 300 kGy. The negative deviation of weight loss confirmed the improvement of the wear properties of PBT, as evidenced by SEM observation on the wear surfaces.

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