Research On The Property Of The In-situ Growthed Nano-TiO₂/PET Composite Resin And Anti-ultraviolet Fiber

In the later 1980s',the anti- ultraviolet fabric was beginning to research. Early researching about the anti-UV textile is focus on pickling and coating. After 1990s',the development of the anti-UV fiber gradually coming into being hot issue. Because the benzene ring in PET molecular structure has highly absorption for ultraviolet ray, PET is the most best anti-UV fiber in present synthetic fibers. If the ultraviolet shielding ratio more than 90%, UV-shielding agent must be used in the processing of the anti-UV fiber.Now, the anti-UV fiber can be manufactured by many ways, and different ways have different merits and faults. In this article, nano-Titanium PET composite resin is synthesized by in-situ growth polymerization. The key is choice the precursor. In the polymerization of PTA and EG, the tetrabutyl titanate precursor hydrolysis into the nano-TiO₂ . And the PET pre-polymer will quickly parcel up the nano- TiO₂. The nano-Titanium PET composite resin has a very excellent spinnability in the KF-POY pilot unit. The fabric anti-UV effect is very well.Through the research, mainly conclusions are as follows:1.We selected Ti(OC₄H₉)₄ as the precursor by comparing with price and properties. The anti-UV functional composite resin has been polymerized successfully.2.We have discussed in-situ growth reaction mechanism. The hydrolysis mechanism of the TNB in PET polymerization is very complex. The in-situ growth production is not the pure nano-TiO₂. We think the mixtures of nano-TiO₂, nano-TiO₂ hydrate and some other co-polymers are estimated. The nano-particles in the composite resin are distributed to 80nm evenly by using the SEM and TEM.3. In-situ growth production such as nano-TiO₂ can greatly improve the speed of polymerization. We will control the reaction easily by slowly reducing vacuum degree and keeping a properly reaction temperature.