KO, MB KWON, IH JO, WH SON, TW 2024-01-21T21:38:41Z 2024-01-21T21:38:41Z 2022-01-10 1994-04-15 0887-6266 https://pubs.kist.re.kr/handle/201004/145600 The thermoreversible gelation of polyacrylonitrile (PAN)/propylene carbonate (PC) solution was investigated by calorimetric, thermomechanical, optical, and rheological measurements. Two endothermic signals are observed for PAN/PC gels in DSC thermograms, and the peak temperature of the higher melting endotherm coincides with the gel melting temperature determined from the TMA thermogram. SEM micrographs show that the overall structure is separated into two phases and is composed of sperical domains, which may be formed upon passing through the thermodynamically unstable or metastable state via the liquid-liquid phase separation. The gelation rate increases with the aging temperature. This is also discussed on the basis of the elasticity theory of the fishnet gel. (C) 1994 John Wiley & Sons, Inc. English JOHN WILEY & SONS INC GELATION SOL-GEL TRANSITION OF POLYACRYLONITRILE PROPYLENE CARBONATE SOLUTION Article 10.1002/polb.1994.090320517 1 JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS, v.32, no.5, pp.945 - 951 JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS 32 5 945 951 scie scopus A1994NA33500017 2-s2.0-0028416509 Polymer Science Polymer Science Article GELATION SOL-GEL TRANSITION POLYACRYLONITRILE PROPYLENE CARBONATE LIQUID-LIQUID PHASE SEPARATION THERMOMECHANICAL ANALYSIS