Polymer THF DMF DMSO CHCl3 Acetone HCOOH Conc. H2SO4
I - + + - ± + +
II - + + - ± + +
III - + + ± ± ± +
IV - + + - ± + +
(+) Soluble; (±) Partially soluble; (-) Insoluble
Table 2: Solubility characteristics of polyesters (I-IV).