DOI QR코드

DOI QR Code

핵제 및 가소제 첨가에 따른 PLA(PolyLactic Acid)의 결정화도 개선 및 결정구조에 관한 연구

Effects of nucleating agents and plasticizers on the crystallinity and crystal structure of PLA(PolyLactic Acid)

  • 투고 : 2014.12.19
  • 심사 : 2015.01.08
  • 발행 : 2015.01.31

초록

본 논문에서는 PLA(PolyLactic Acid)의 결정화도 및 결정구조에 대해 연구하였다. PLA는 옥수수 전분으로부터 추출한 Lactic acid로부터 얻어지는 친환경적인 열가소성 플라스틱으로 매립시 미생물에 의해 완전히 분해되는 소재로 각광받고 있지만 열 안정성이 낮고 낮은 결정화도로 인해 높은 기계적 물성이 요구되는 용도에는 부적합한 단점을 가지고 있다. 이 중에서도 낮은 결정화도와 느린 결정화 속도는 사출 성형 공정에서 Cycle time을 증가시키는 요인으로 다른 소재와의 경쟁에 매우 큰 단점으로 나타난다. 본 논문에서는 핵제 및 가소제의 종류와 함량에 따른 결정화도 및 결정화 속도의 변화를 연구함으로써 궁극적으로 사출 성형 공정에서 Cycle time을 개선하고자 하였다.

In this paper, the crystal structure and the crystallinity of PLA(PolyLactic Acid) were studied. PLA is a eco-friendly thermoplastic which completely decomposed by microorganisms, but has low thermal stability and low degree of crystallinity. The low crystallization rate makes the cycle time of injection molding longer and the degree of crystallinity lower. It is a very big disadvantage comparing the other thermoplastics. We improved the degree of crystallinity and the crystallization rate by introducing nucleating agents and plasticizer, and discussed the mechanism.

키워드

참고문헌

  1. Michel A. Huneault et al., "Poly(lactic acid) crystallization", Progress in Polymer Science, Vol. 37, No. 12, pp.1657-1677, 2012. DOI: http://dx.doi.org/10.1016/j.progpolymsci.2012.07.005
  2. JenTaut Yeh et al., "Isothermal crystallization kinetics and crystal structure of poly(lactic acid) : Effect of triphenyl phosphate and talc", Vol. 118, No. 6, pp.3560-3562, 2010.
  3. Ming Li et al., "Nonisothermal crystallization kinetics of poly(lactic acid) formulations comprising talc with poly(ethylene glycol)", Polymer Engineering and Science, Vol. 50, No. 12, pp.5-7, 2010. DOI: http://dx.doi.org/10.1002/pen.21755
  4. Huneault et al., "Effect of nucleation and plasticization on the crystallization of poly(lactic acid)", Polymer, Vol. 48, No. 23, pp.6858-6859, 2007.
  5. Felice De Santis et al., "Nucleation and crystallization kinetics of poly(lactic acid)", Thermochimica Acta, Vol. 522, No. 1-2, pp,129-130, 2011.
  6. Lijia An et al., "Crystal structure and morphology in fluenced by shear effect of poly(L-lactide) and its melting behavior revealed by WAXD, DSC and in-situ POM", Polymer, Vol. 52, No. 15, pp.3478-3480, 2010. https://doi.org/10.1016/j.polymer.2011.05.044
  7. E.Pioskowska et al., "Crystallization, structure and properties of plasticized poly(L-lactide)", Polymer, Vol. 46, No. 23, pp.2-5, 2005 https://doi.org/10.1016/S0032-3861(05)01245-0
  8. Madami Okamoto et al., "Morphology and crystallization kinetics in a mixture of low-molecular weight aliphatic amide and polylactide", Polymer, Vol. 47, No. 4, pp.3-5, 2006
  9. Lin-Qiong Xu et al., "Crystallization and foaming behaviors of Poly(lactic acid) using supercritical carbondioxide as a foaming agent", SPE ANTEC, pp.2454-2458, 2014
  10. Supaphorn Thumsorn et al., "Crystallization characteristic and heat seal properties of biodegradable films", SPE ANTEC, pp.309-313, 2014
  11. Peng Zhao et al., "Crystallization characterrization of injection molded parts using ultrasonic technology", SPE ANTEC, pp.1515-1519, 2014
  12. Saara Inkinen et al., "From Lactic Acid to Poly(lactic acid) (PLA):Characterization and Analysis of PLA and Its Precursors", Biomacromolecules Vol.12 No.3, pp.523-532, 2011 DOI: http://dx.doi.org/10.1021/bm101302t