Abstract:

Polyester was synthesized with nano-TiO2 particles modified with titanium tetrabutoxid. It is found that the dyeing rate has increased three. TEM and DSC were used to analyze this phenomenon. It is shown that nano-TiO2 well dispersed in polyester and the glass transiton temperature was increased, indicating well compatibility between surface modified particles and polyester. The Avrami theories, Jeziorny theories and Kissinger method were adopted to further analyze the non-isothermal crystallization, and the results showed that nano- TiO2 remardably reduce the crystallization active energy of polyester and improve the crack crystalline growth velocity. The nano particles could be as crystalline nucleation to drive crystallization from homogenous to heterogeneous. The experiments revealed that the crystallization of polyester was changed with nano- TiO2, promoting dyestuff adsorbing and rising in thermal properties.