Ai. Suvorova et al., CHEMICAL-STRUCTURE OF PLASTICIZERS, COMPATIBILITY OF COMPONENTS AND PHASE-EQUILIBRIUM IN PLASTICIZED CELLULOSE DIACETATE, Die Makromolekulare Chemie, 194(5), 1993, pp. 1315-1321
The phase equilibrium of plasticized polymer systems on the basis of c
ellulose diacetate and ethylene glycol esters of dibasic aliphatic aci
ds (from oxalic acid to 1, 10-decanedicarboxylic acid) was studied and
the solubility parameters and the thermodynamic interaction parameter
s of the components were calculated. It is shown that an increase in m
olecular weight of the plasticizers leads to a lower miscibility of th
e components, a fact which is reflected in a regular rise of the upper
critical solution temperature (UCST), a tendency of the systems for g
elation, a decrease of the solubility parameter of the plasticizer del
ta1, and a growth of the interaction parameters chi(H) and chi12. The
results are discussed in terms of the existing theories for polymer so
lutions.