| Popis: |
A study was made of heats of solution and swelling in dimethylformamide and tetrachloroethane of a number of polyarylates, aromatic polyamides and tetrachloroethane of a number of polyarylates, aromatic polyamides and polyimides, the macromolecules of which contain phthalide, fluorene and anthrone cardo-groups. The interaction of all polymers studied with DMF and tetrachloroethan is normally accompanied by considerable exothermic effects. Heats of solution or swelling are additive and formed of heats of interaction with these solvents recurrent in the chain of aromatic acid, diamine and bisphenol residues. |
