Abstract:

The molt grafting reaction was employed to graft vinyl trimethoxysilane（VTMS）to polyethylene-wax（PEW），and the characteristic absorbance peaks at 1090 cm^-1，1030 cm^-1 and 960 cm^-1 in FTIR spectra proved the successful grafting. As a precursor，tetraethoxysilane（TEOS）was mixed with grafted PEW and then a PEW/SiO_² hybrid material could be prepared by the sol-gel process. The morphology and properties of the hybrid were studied with FTIR，TEM and TG/DTA. The study indicates that the hybrid containing 0. 98%—4. 12% of SiO₂ could be prepared via the sol-gel process and good compatibility of the molecules of grafted PEW and SiO₂ particles was observed. The study also showed that the thermostability of PEW was improved at the presence of nano-SiO₂ particles. The decomposing temperature of PEW was increased by 21. 34℃ when 3. 75% of SiO₂ was present.