Meaning
Organometallic compound used as a catalyst in polymerization and esterification reactions facilitates the synthesis of polyesters like polybutylene terephthalate. Using titanium tetrabutoxide catalyst in resin synthesis ensures a high conversion rate and helps control the molecular weight distribution of the resulting polymer.
Polymer Synthesis
Catalytic efficiency during the reaction is essential for achieving the target polymer properties. In the production of polyesters, titanium tetrabutoxide catalyst accelerates the transesterification step, reducing the reaction time and temperature. This limits thermal degradation of the polymer chains during synthesis, resulting in a resin with superior mechanical properties.
Color Consistency
Residual catalyst levels in the polymer can affect the optical properties and stability of the moulded parts. Excessive amounts of titanium tetrabutoxide catalyst can cause yellowing of the resin during processing. This color shift is a major defect for parts requiring high optical clarity or specific color matching on the production line.
Melt Stability
Thermal degradation during subsequent injection moulding run can be triggered by active catalyst residues. These active residues of titanium tetrabutoxide catalyst can promote depolymerization or chain scission when the resin is reheated in the moulder’s barrel. This results in a drop in melt viscosity, leading to part flashing and reduced impact strength in the finished components.
To prevent this degradation, stabilizer packages are added during resin compounding to deactivate the remaining catalyst and ensure consistent performance across multiple moulding cycles.
