Delbar fattahinajad - Iran Polymer and Petrochemical Institute, P.O. Box: 14965/115, Tehran, Iran
Mohammad Bagher alavi - Iran Polymer and Petrochemical Institute, P.O. Box: 14965/115, Tehran, Iran
morteza ehsani - Iran Polymer and Petrochemical Institute, P.O. Box: 14965/115, Tehran, Iran,South Tehran Branch, Islamic Azad University
Khosrow Khodabakhshi - Iran Polymer and Petrochemical Institute, P.O. Box: 14965/115, Tehran, Iran

This work aims to investigate the flexural properties of neat neopantylglycol unsaturated polyester (NPG) and its nanoglass flake and glassfibers composites. It was found that flexural modulus of the nano composite was lower than that of neat resin. However, sample containing nano particles and glassfibers showed a significant improvement in the flexural modulus compared with the sample with only glassfibers. It is believed that this is due to the positional geometry of nanoglass flakes in the composites

Resin, Unsaturated polyester, NPG, Nanoglass flake, Glassfiber composites, Flexural modulus