Preparation of HALS-Functional Core-Shell Nanoparticles and their Application in Poly(Butylene Terephthalate)

HALS-functional core-shell nanoparticles, poly(BA-MMA-PMPA), were prepared by emulsion polymerization. The chemical structure and the microstructure of the particles was confirmed by Fourier transformed infrared (FTIR) and transmission electron microscopy (TEM), respectively. The nanoparticles were used to modify PBT and had good compatibility with PBT. The mechanical properties before and after UV-irradiation analysis demonstrated that the UV-resistance and impact resistance of PBT were obviously improved by poly(BA-MMA-PMPA). The degradation degree of PBT was retarded by poly(BA-MMA-PMPA) as studied by thermogravimetry analysis (TGA). The surface chemical functional groups changes revealed that the surface of PBT was greatly protected by poly(BA-MMA-PMPA).