Textile Science and Engineering (한국섬유공학회지)

The Korean Fiber Society (한국섬유공학회)
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Effect of Molding Temperature on the Fracture Toughness of Biodegradable Poly(lactic acid) for Biomaterial

의료용 생분해성 고분자 폴리유산의 성형온도가 파괴인성에 미치는 영향

  • 이덕보 (부경대학교 재료공학부)
  • Published : 2002.10.01
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Abstract

The aim of this study was to understand the effect of molding temperature on fracture toughness and microstructure of PLA. The fracture toughness( $K_{IC}$) was measured using single-edge-notch bend(SENB) specimens molded at various molding temperatures. The microstructure around a crack tip of PLA was also observed on a polarizing microscope under the cross polarization. The $K_{IC}$ of PLA decreased with increasing molding temperature because spherulite formation at high molding temperatures suppressed craze formation which is one of the toughening mechanism of thermoplastic materials.s.

Keywords

References

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