Assessment of nanocomposites based on unsaturated polyester resin/nanoclay under impact loading

作者：Esfahani Javad Moftakharian; Sabet Ali Reza; Esfandeh Masoud^*

来源：Polymers for Advanced Technologies, 2012, 23(4): 817-824.

DOI：10.1002/pat.1977

• nanoclay
• unsaturated polyester
• impact properties
• fracture

The aim of this study is to investigate the performance of nanoclay reinforced unsaturated polyester (UP) resin under impact loads. Nanocomposite specimens containing nanoclay in 0, 1.5, and 3 (wt%) were prepared by melt mixing method. X-ray diffraction, transmission electron microscopy analysis, scanning electron microscope photographs, and viscosity changes in liquid state resin confirmed exfoliation and intercalation of the nanoclay in the UP resin system used. Tensile modulus showed an increase with increase in nanoclay content. However, the tensile strength and elongation at break exhibited reducing performance with increase in nanoclay content. Izod impact test results indicated better performance for the specimens containing nanoclay reinforcements, with 1.5 (wt%) of nanoclay specimens showing the highest value. High velocity impact tests were carried out using gas gun in velocity range of 20-100m/sec and harden steel hemispherical tip projectile with diameter of 8.7mm and weight of 11.54g. Results for high velocity impact test indicated better performance by the specimens containing nanoclay, with 1.5 (wt%) nanoclay showing the highest attained value. Damage assessments of impact area for all specimens showed spalling type brittle failure with punch out and sever fragmentation pattern.

• 出版日期2012-4