Article
  • Study on Phase Behavior of Binary Polymer Solution Using Ultrasonic Technique
  • Lee SD, Moon KS, Choi HD, Yoon HG, Moon TJ
  • 초음파를 이용한 이성분 고분자 용액의 상거동에 관한 연구
  • 이상대, 문경식, 최형도, 윤호규, 문탁진
Abstract
Phase behaviors of PS/cyclohexane and PS/methyl acetate binary solutions were investigated by using ultrasonic technique. Ultrasonic absorption of these solutions was increased with temperature and an upward peak was observed at a specific temperature. The peak temperature was considered to be the cloud-point, which was well agreed with reference data, and the phase diagram of UCST behavior could by determined from these points. Our experimental results showed that the ultrasonic absorption behavior of the proposed sample was affected by the molecular weight of polymer, polymer concentration, and solvent. The ultrasonic velocity was linearly decreased with temperature, however, there was no correlation between the cloud-point temperature and the ultrasonic velocity

초음파 분석법을 이용하여 polystyrene (PS)과 cyclohexane 및 methyl acetate 용액의 상분리 거동을 고찰하였다. 초음파의 흡수는 온도 증가에 따라 증가하는 경향을 보였으며 특정 온도에서 피크를 나타내었다. 이 피크에 해당하는 온도가 cloud-point로써 이들 온도로부터 UCST(upper critical solution temperature) 거동을 나타내는 상태도를 작성할 수 있었으며, 기존의 측정결과와도 좋은 일치를 보였다. 또한 온도에 따른 고분자 용액의 초음파 흡수곡선 및 상태도로부터 용액의 초음파 흡수는 용매의 용해도, 고분자의 분자량 및 고분자 함량에 따라 다르게 거동한다는 것을 알 수 있었다. 초음파의 음속은 온도가 중가할수록 선형적인 감소를 보였으나 상거동과 관련된 특별한 관계를 관찰할 수 없었다.

Keywords: ultrasonic velocity; absorption; binary polymer solution; phase behavior

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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

  • 1997; 21(2): 234-240

    Published online Mar 25, 1997