생체재료학회지 (Biomaterials Research)

  • 제20권1호
  • /
  • Pages.37-45
  • /
  • 2016
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  • 1226-4601(pISSN)
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  • 2055-7124(eISSN)
한국생체재료학회 (Korean Society for Biomaterials)
권호 표지
DOI QR코드

DOI QR Code

Effects of poly(L-lactide-ε-caprolactone) and magnesium hydroxide additives on physico-mechanical properties and degradation of poly(L-lactic acid)

  • Kang, Eun Young (Center for Biomaterials, Korea Institute of Science and Technology) ;
  • Lih, Eugene (Center for Biomaterials, Korea Institute of Science and Technology) ;
  • Kim, Ik Hwan (Department of Biological Science, Korea University) ;
  • Joung, Yoon Ki (Center for Biomaterials, Korea Institute of Science and Technology) ;
  • Han, Dong Keun (Center for Biomaterials, Korea Institute of Science and Technology)
  • 투고 : 2016.01.11
  • 심사 : 2016.02.26
  • 발행 : 2016.03.01
⟨ 이전 논문 다음 논문 ⟩

초록

Background: Biodegradable poly(L-lactic acid) (PLLA) is one of the most widely used polymer in biomedical devices, but it still has limitations such as inherent brittleness and acidic degradation products. In this work, PLLA blends with poly($L-lactide-{\varepsilon}-caprolactone$) (PLCL) and $Mg(OH)_2$ were prepared by the thermal processing to improve their physico-mechanical and thermal properties. In addition, the neutralizing effect of $Mg(OH)_2$ was evaluated by degradation study. Results: The elongation of PLLA remarkably increased from 3 to 164.4 % and the glass transition temperature ($T_g$) of PLLA was slightly reduced from 61 to $52^{\circ}C$ by adding PLCL additive. $Mg(OH)_2$ in polymeric matrix not only improved the molecular weight reduction and mechanical strength of PLLA, but also neutralized the acidic byproducts generated during polyester degradation. Conclusions: Therefore, the results demonstrated that the presence of PLCL and $Mg(OH)_2$ additives in PLLA matrix could prevent the thermal decomposition and control degradation behavior of polyester.

키워드

과제정보

연구 과제 주관 기관 : National Research Foundation of Korea

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