Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Measurement and Analysis of Diffusivity for SBS/cyclic Solvent Systems Using CCIGC Technique

CCIGC 기법을 사용한 SBS/cyclic solvent 시스템에서의 확산계수 측정 및 해석

  • Kim, Jiui (Department of Chemical and Biological Engineering, Hanbat National University) ;
  • Hong, Seong Uk (Department of Chemical and Biological Engineering, Hanbat National University)
  • 김지의 (한밭대학교 화학생명공학과) ;
  • 홍성욱 (한밭대학교 화학생명공학과)
  • Received : 2013.11.19
  • Accepted : 2014.01.08
  • Published : 2014.04.10
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Abstract

In many polymer processing operations, the diffusion of small molecules in polymeric materials plays an important role. The fundamental physical property required to design and optimize processing operations is the mutual diffusion coefficient. To investigate the transport properties of polymer/solvent systems at infinite dilution, capillary column inverse gas chromatography (CCIGC) is often employed. In this study, diffusion and partition coefficients of cyclic solvents in styrene/butadiene/styrene (SBS) block copolymer were measured over a wide temperature range using the CCIGC technique.

많은 고분자 공정에서 고분자에서의 유기 용매와 같은 저분자 물질의 확산은 중요하다. 고분자에서의 저분자 물질의 이동은 중합 반응기의 효율성과 제조된 고분자의 특성을 결정한다. 공정을 설계하고 최적화하는데 중요한 물성값은 고분자/용매 상호확산 계수이다. 용매의 농도가 매우 낮은 무한희석 상태에서의 고분자/용매 계의 무한확산계수를 측정하기 위해서 capillary column inverse gas chromatography (CCIGC) 기법이 흔히 사용된다. 이 기법을 사용하면 비교적 짧은 시간에 확산계수와 분배계수를 측정하는 것이 가능하다. 본 연구에서는 CCIGC 기법을 사용해서 styrene/butadiene/styrene (SBS) 블록 공중합체에서 환형 구조를 가지는 용매의 확산계수와 분배계수를 다양한 온도 범위에서 측정하였다.

Keywords

References

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