Three kinds of attapulgite supported magnesium/titanium composite catalysts for the polycondensation of polyethylene terephthalate were prepared via adding active components in different orders. Catalytic activities of the prepared catalysts were evaluated by differential scanning calorimeter (DSC). The reaction kinetics of bis-hydroxyethyl ethylene terephthalate polycondensation was studied through isoconversional method and Flynn-Wall-Ozawa method to calculate the activation energy(E)of the reaction. The results show that the E of the catalysts is E[A]展开▼
