SURFACE-MODIFIED PARTICLES FOR POLYESTER NANOCOMPOSITES

摘要

Silica nanoparticles that have been subjected to surface treatment with novel silane compositions exhibit improved dispersion in polyester nanocomposites. The novel silane compositions are prepared by reacting a 3-isocyanatopropyl trialkoxysilane with an alcohol or diol having a divalent alkylene or alkylene-ether group, where the alcohol or diol has a formula weight less than about 5000. The surface treatment of the nanoparticles leads to improvements in mechanical properties and haze reduction in polyester nanocomposites containing them.