Thermogravimetric studies on the condensation kinetics of fully aromatic polyesters
The kinetics of the polycondensation of a fully arom. polyester was studied. The mass-loss curves examd. with a thermogravimetric balance were analyzed on the basis of a kinetic model. Under the exptl. conditions used the polycondensation of 4-acetoxybenzoic acid (ABA) can be supposed to be irreversible and of 2nd order. The model takes into account the simultaneous evapn. of the monomer and the formed low mol. volatile product (acetic acid). The reaction temp. was varied in the range of 194 to 294 DegC. Different catalysts such as Fe-, Na-, and K-acetate were used to accelerate the polycondensation reaction. The height of the sample layer has an important influence on the global kinetics. The model parameters were estd. by a non-linear curve fitting with a com. available program. [on SciFinder (R)]
WOS:A1995BF14E00032
1995
Frankfurt-am-Main
373
85
DECHEMA Monographien; 131
CAN 124:177007 35-3 Chemistry of Synthetic High Polymers Ecole Polytechnique Federale de Lausanne,Switz. Journal 0070-315X written in English. 127-08-2 (Potassium acetate); 127-09-3 (Sodium acetate); 3094-87-9 (Iron(II) acetate) Role: CAT (Catalyst use), USES (Uses) (catalysts; kinetics of polymn. of acetoxybenzoic acid in presence of); 2345-34-8 (4-Acetoxybenzoic acid) Role: PEP (Physical, engineering or chemical process), PRP (Properties), RCT (Reactant), PROC (Process), RACT (Reactant or reagent) (thermogravimetric study of kinetics of polymn. of acetoxybenzoic acid in presence of metal acetate catalysts)
EPFL