Abstract
A hybrid polymer of SiO2@Tb3+(poly(ethylene terephthalate)-tetraglycol)3 phenanthroline (SiO2@Tb3+(PET–TEG)3Phen) was synthesized by mixing of inorganic SiO2 nanoparticles with polymeric segments of PET–TEG, whereas PET–TEG was achieved through multi-step functionalization strategy. Tb3+ ions and β-diketonate ligand Phen were added in resulting material. The experimental results demonstrated that it was well blended with PET as a robust additive, and not only promoted the crystallinity, but also possessed excellent luminescence properties. An investigation of the mechanism revealed that the SiO2 nanoparticles functioned as a crystallization promotor; the Tb3+ acted as the fluorescent centre; and the PET–TEG segments played the role of linker and buffer, providing better compatibility of PET matrix with the inorganic component. This work demonstrated that hybrid polymers are appealing as multifunctional additives in the polymer processing and polymer luminescence field.
Highlights
Poly(ethylene terephthalate) (PET) is an important industrial material that is widely used for packaging film, fiber, and beverage bottles owing to its excellent thermophysical properties, chemical resistance, and low permeability [1]
It is crucial to determine the molecular weight of PET–Tetraethylene glycol (TEG)
These results demonstrated the successful synthesis of SiO2 @Tb3+ (PET–TEG)3 Phen
Summary
Poly(ethylene terephthalate) (PET) is an important industrial material that is widely used for packaging film, fiber, and beverage bottles owing to its excellent thermophysical properties, chemical resistance, and low permeability [1]. It is commonly accepted that addition of nucleating additives is one of the most effective protocols to improve the crystallization rate and achieve good crystallinity, which lead to the enhancement of various properties [4,5,6]. Silica nanoparticles (SiO2 NPs) with a large surface area have been demonstrated to be nanofillers in the PET matrix, enhancing the mechanical and physical properties owing to the strong interaction between SiO2 and the PET chain [7]. The incompatibility is the big problem in achieving homogeneously dispersed SiO2 NPs in the PET matrix. Specific properties are difficult to integrate into PET, as the bare SiO2 lacks functional groups to anchor specific moieties. Hybrid polymer is a special type of nucleating agent [8] that has the below properties of inorganic
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