• Copolymerization of Butyl Acrylate (BA)/Methyl Methacrylate (MMA) and Thermal, Mechanical Properties of Poly(lactic acid)/Acrylic Copolymer Blends
  • Kim GH, Kim DY, Park HY, Jeon IR, Seo KH
  • 부틸아크릴레이트(BA)/메틸메타아크릴레이트(MMA) 공중합체의 제조 및 이들과 Poly(lactic acid) 블렌드의 열적, 기계적 성질
  • 김기홍, 김도영, 박해윤, 전일련, 서관호
Abstract
Despite the several advantages, low flexibility and high brittleness in poly(actic acid) (PLA) are generally recognized as disadvantages. In order to improve these properties, poly(BA-co-MMA) with different monomer ratio was prepared by suspension polymerization. The effect of the monomer ratio on the structure, gel content, molecular weight, and thermal property of poly(BA-co-MMA) was investigated. And thermal, mechanical, melt flow, and morphology of PLA/poly(BA-co-MMA) 50 wt%/50 wt% blend were investigated by dynamic mechanical anaysis (DMA), melt flow index (MFI), tensile tests, and scanning electron microscopy (SEM). In this study, the introduction of poly(BA-co-MMA)with BA content of 40~60% increased the flexibility of PLA.

Poly(lactic acid)(PLA)는 여러 가지 장점에도 불구하고 일반적으로 낮은 유연성의 단점을 가진다. 이런 물성을 보완하기 위해 n-butyl acrylate(BA)와 methyl methacrylate(MMA)를 함량별로 poly(BA-co-MMA)를 현탁중합으로 제조하였다. 함량에 따라 제조된 poly(BA-co-MMA)의 구조, 젤 함량, 분자량, 열적 성질을 분석하였다. 그리고 PLA/poly(BA-co-MMA) 50 wt%/50 wt% 블렌드를 동적 점탄성 분석, 용융흐름지수, 인장 시험, 주사 전자 현미경을 통해 열적, 기계적 성질, 용융 흐름, 모폴로지를 분석하였다. 본 연구에서는 BA의 함량이 40~60%의 poly(BA-co-MMA)를 PLA와 블렌드 시 PLA의 낮은 유연성에 도움을 줄 수 있을 것으로 보여진다.

Keywords: n-butyl acrylate; methyl methacrylate; poly(lactic acid); suspension; copolymerization

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This Article

  • 2016; 40(5): 786-796

    Published online Sep 25, 2016

  • 10.7317/pk.2016.40.5.786
  • Received on May 10, 2016
  • Accepted on Jun 3, 2016