Investigation of Association in coal Extract Solution by the Measurement of Relative Viscosity

摘要

A large portion of coal does not dissolve even in good solvents, but swells in many organic solvents. Swelling ratios of coal are constant within experimental errors regardless of coal/solvent rations, if coal/solvent mass rations (C/S) are more than 10/100. However, when coal concentra- tions are decreased to less than 10/100, swelling rations increase as illustrated in Figure 1.~1 The result in this figure was obtained by the volumetric method using a glass tube.