Article
  • Foaming of Poly(butylene succinate) with Supercritical Carbon Dioxide
  • Son JM, Song KB, Kang BW, Lee KH
  • 초임계 이산화탄소를 이용한 Poly(butylene succinate) 발포
  • 손재명, 송권빈, 강병욱, 이광희
Abstract
The foaming of poly(butylene succinate) (PBS) using supercritical CO2(scCO2) was studied. In order to improve the melt strength, PBS was modified using the reactive compounding technique. Rapid decompression of scCO2-saturated PBS at a temperature above the depressed Tm yielded expanded microcellular foams. The resulting foam structure could be controlled by manipulating process conditions. Experiments varying the foaming temperature while holding other variables constant showed that higher temperatures produced larger cells and reduced cell densities. Higher saturated pressures led to higher nucleation densities and smaller cell sizes. Decreasing the rate of depressurization permitted a longer period of cell growth and therefore larger cells were obtained.

초임계 CO2(scCO2)를 사용하여 poly(butylene succinate) (PBS)를 발포하였다. PBS는 용융 강도를 높이기 위하여 반응 컴파운딩 기법으로 개질하였다. scCO2로 포화된 PBS를 강하 융점 이상의 온도에서 빠르게 압력을 낮춤으로써 미세기포 발포체를 제조하였다. 발포체의 구조는 공정 조건을 변화시켜 제어할 수 있었다. 다른 변수들은 고정하고 발포 온도만 변화시킨 실험은 발포 온도가 높을수록 셀 크기는 증가하고, 셀 밀도는 감소함을 보여 주었다. 포화 압력이 클수록 기핵 밀도가 높아졌으며, 그 결과로 셀의 크기는 감소하였다. 감압 속도가 느린 경우에는 셀이 장시간 동안 팽창함으로써 보다 큰 셀이 얻어졌다.

Keywords: PBS; supercritical carbon dioxide; microcellular foam.

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 2012; 36(1): 34-40

    Published online Jan 25, 2012

  • Received on May 27, 2011
  • Accepted on Aug 29, 2011