Thermo-mechanical behavior of TiO2 dispersed epoxy composites. (15th October 2017)

• Record Type: Journal Article
• Authors: Singh, Sushil Kumar; Singh, Samarjit; Kumar, Abhishek; Jain, Anuj
• Is Part Of: Engineering fracture mechanics. Volume 184(2017)
• Page Start: 241
• Page End: 248
• Publication Date: 2017-10-15
• Subjects: Epoxy resin -- Viscoelastic properties -- TiO2 particles; Fracture mechanics -- Periodicals; Rupture, Mécanique de la -- Périodiques; Fracture mechanics; Periodicals; 620.112605
• DOI: 10.1016/j.engfracmech.2017.09.005
• Languages: English
• ISSNs: 0013-7944

Abstract

Graphical abstract: Highlights: Micron/nano TiO2 particles are dispersed into epoxy through mechanical mixing. Studied mechanical and viscoelastic behavior of micron/nano TiO2 dispersed epoxy. Mechanical and viscoelastic properties enhance with micron/nano TiO2 dispersion. Nano dispersion shows better mechanical and viscoelastic properties. Abstract: To study the effect of particle size and filler concentration of TiO2 particles on the mechanical and viscoelastic properties (such as tensile strength, fracture toughness, storage modulus, damping properties and the glass transition temperature) of epoxy composites, tensile test with fractography, three point bend fracture test, DMA test were performed in accordance with the ASTM standards. The micron and nano-sized TiO2 particles were dispersed with loading fraction up to 8 wt% in the epoxy resin. The result of tests revealed that epoxy resin cast filled with TiO2 particles represented higher tensile strength and fracture properties as compared to pristine epoxy. The maximum increase in tensile strength and fracture toughness for micron-sized TiO2 reinforced epoxy composites is 32.57% and 44.95% respectively at a filler loading of 4 wt%. However, the maximum increase in tensile strength and fracture toughness for nano-sized TiO2 reinforced epoxy composites is 43.70% and 141.85% respectively at a filler loading of 6 wt%. The storage modulus of reinforced epoxy composites in the glassy region showed maximum enhancement of about 4.73% for 4 wt% micron-sized TiO2 and 32.88% for 4 wt% nano-sized TiO2 as compared to pristine epoxy at 40 °C.