Study on Reaction Kinetics of PET Polymerization with New Catalysts

Prepared a series of new nontoxic and unpolluted antimony-free catalysts and evaluated the catalytic effectiveness by the reaction kinetics of PET. The kinetics results show that the new antimony-free catalysts exhibit high effectiveness both in esterification and polycondensation. Compared to that without catalyst, the esterification time with self-made catalysts is shortened by 20 %～50 %, the activation energy decreases significantly. And the polycondensation reaction rate constant with self-made catalysts is 2～3 times of that with traditional Sb_2O_3 catalyst, the poly- condensation time is shortened by 40 %～70 %.