83.石炭濃厚溶液の粘弾性に及ぼす会合相互作用の影響

抄録

Pyridine soluble portions of Upper Freeport (UF) and Illinois No.6 (IL) coals were mixed with N-methyl-2-pyrrolidinone (NMP). Anealings of the mixtures at 353K could produce stable gelly materials. Viscoelastic properties of the gels were characterized by means of controlled stress oscillatory rheometory at temperatures between 223 and 273K. The measured modulus of rigidity was resolved into storage and loss components, as a function of temperature and oscillation frequency. Time-temperature superposition procedures were applied to construct the master curves reduced to 243K in which the temperature dependence of the shift factor can be described by Arrhenius equation. Effect of O-methylation and hydrogenation of aromatic rings of the extracts on the dynamic modulus of the gels were examined.