2018. Characterization of thermo-physical and hardness properties of unsaturated polyester resin hybrid nano composites Sihama Issa Salih1, Waleed Bdaiwi Salih2, Husam Sakin Hamad2. Iraqi Journal of Physics. 16, 37 (Sep. 2018), 136–148. DOI:https://doi.org/10.30723/ijp.v16i37.85.