PREPARATION AND INVESTIGATION OF SOME MECHANICAL PROPERTIES OF UNSATURATED POLYESTER RESIN REINFORCED BY HYBRID NANOPARTICLES

الملخص

In this study, nano-composite of polymeric materials, prepared from unsaturated polyester
resin (UP). Two groups of nanocomposites were prepared by Hand Lay-up method. The first
group consists from (UP) reinforced by hybrid nanoparticles consisting of a mixture of
zirconium oxide and yttrium oxide (30 mol%Y2O3- ZrO2) with particles size (83.98nm). The
second group consists of (UP) reinforced by zirconia nanoparticles (ZrO2) with particle size
(47.23nm). The effect of volume fraction (0.5%, 1%, 1.5%, 2%, 2.5%, 3%) of the
nanoparticles additives on some mechanical properties of composites materials was studied
also. The results shown that the values of the flexural modulus, impact strength and fracture
toughness increased, as the volume fraction ratio of the nanoparticle increased for both
groups of nanocomposites, while flexural strength values decreased with the increased the
volume fraction ratio of the nanoparticles for both groups of nanocomposites also. As well
as, the unsaturated polyester resins reinforced by hybrid nanoparticles has higher mechanical
properties as compared with their counterparts of composites reinforced by zirconia
nanoparticles only. The morphological formation of the fracture surface showed a close
interconnection between all components of the prepared polymeric compositions. This
reinforce a good compatibility between unsaturated polyester resins and reinforcement
nanoparticles, which enhancement the mechanical properties.