Study on solid-phase thickening of polyester prepared with antimony and titanium catalysts
A small solid-phase polycondensation device was used to study the solid-phase polycondensation re-action kinetics of polyester produced using self-made novel chelating titanium catalyst and ethylene glycol antimo-ny catalyst.Tests using injection molding blow bottles were performed on the chips that increased viscosity and were made using both catalysts.The findings show that the novel titanium catalyst's solid-state polycondensation re-action has an activation energy of 74.6 kJ/mol,which is greater than the antimony of ethylene glycol's 56.7 kJ/mol.When using a new titanium catalyst and injection molding process,the viscosity-increasing chips and bottle preforms have better color and thermal stability than when using ethylene glycol antimony.
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