Article
  • Synthesis and Characterization of HEMA-PCL Macromer Grafted onto Starch
  • Kong WS, Chin IJ, Kim MN, Kim SH, Yoon JS
  • 옥수수 전분에 HEMA-PCL Macromer를 그래프팅시킨 공중합체의 합성 및 특성
  • 공원석, 진인주, 김말남, 김수현, 윤진산
Abstract
Polycaprolactone(PCL0 was blended with corn statch to procuce biodegradable compost films and the biodegradability and mechanical properties were investigated. As the compatibilizer for the emmiscible PCL/starch blend, 2-hydroxyethylmethacrylate(HEMA)-PCL macromer was grafted onto starch by intially grafting HEMA to starch and then grafting of PCL onto HEMA via ring opening polymerization of ε-caprolactone. When biodegradability of the PCL grafted starch-g-HEMA copolymers was compared with that of starch by the modified Sturm test, graft copolymers degraded at much slower rates bue to the presence of the non-degradable HEMA. With the addition of the graft copolymer up to 5 wt% to the blend, the elongation-at-break of the starch/PCL blend increased substantially, while the tensile strength and modulus did not change much. SEM observation of the blend containing 2wt% copolymer clearly indicated that the interfacial adhesion between the starch and PCL was strengthened by the copolymer.

Polycaprolactone(PCL)을 base로하는 효과적인 compost필름을 만들기 위하여 옥수수전분을 블렌딩한 뒤 기계적 특성과 미생물에 의한 생분해도를 조사하였다. 비상용성을 보이는 옥수수전분/PCL 블렌드에 대한 상용화제로는 2-hydroxyethylmethacrylate(HEMA)-PCL macromer를 옥수수전분에 그래프팅시킨 고중합체를 사용하였는데 옥수수전분에 대한 HEMA의 그래프팅율이 가장 높은 것과 낮은 것을 선택하여 일정한 조성의 ε-caprolactone에 그래프팅시킨 상용화제들의 상요화 효과를 비교하였다. 상용화제를 함유한 옥수숫전분/PCL(50/50) 블렌드의 신장율이 상당히 증가하였으며 SEM 관찰 결과 이는 사용화제로 인해 옥수수전분 알갱이와 PCL 기질간의 계면 접착력이 증가하였기 때문으로 판단된다. 그러나 모듈러스와 인장강도는 상용화제 사용에도 불구하고 별다른 변화가 없었다.

Keywords: polycaprolactone; HEMA; starch; grafting; biodegradability

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2022 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2000; 24(2): 141-148

    Published online Mar 25, 2000