STUDY OF HIGH ABRAISION RESISTANT UPR/SiO_2 NANO-COMPOSITES PREPARED BY AN IN-SITU POLYMERIZATION PROCESS

摘要

Abrasion-resistant nanocomposites, unsaturated polyester resin (UPR)/ silicon dioxide (SiO_2), were prepared by an in-situ polymerization process. The effects of nano-SiO_2 on the chemical-physical properties of UPR/ SiO_2 nanocomposites were studied by performing thermal, morphological, and mechanical analysis, and the abrasion resistance has also been evaluated. The results show that UPR/ SiO_2 nanocomposites have an average weight loss about half in comparison with that of neat UPR by adding only 2% of nano-particles. The glass temperature (Tg) of composite materials were measured by DSC. It is found that the Tg of composite materials is higher than that of UP resin, which is in agreement to the results of abrasion resistant properties. The in-situ UPR/SiO_2 that reacts a good distribution of nano-SiO_2 in the UPR has a better toughness and strength.