Characterization of ACS modified epoxy resin composites with fly ash and cenospheres as fillers: Mechanical and microstructural properties

Abstract

Composites of diglycidyl ether of bisphenol A resin modified with Amine Containing Silicone as matrix and fly ash and cenospheres as fillers have been examined for their mechanical and microstructural properties. The microstructural features of the composites in terms of free volume size and content, and its influence on the mechanical properties has been investigated. The results indicate that amine containing silicones works as a good coupling agent between the filler and the resin. Composites with 5 phr fly ash and 30 phr cenospheres showed improved thermal stability as indicated by the increased Tg of the composites, possibly because of increased SiOSi linkages. The tensile strength of cenospheres‐filled composites showed good improvement compared with that of the fly ash‐filled composites. Low density (0.6 g/cc) and higher silica content (60%) of cenospheres seems to be the reason for this observation, which is well corroborated by the free volume data. POLYM. COMPOS., 2011. © 2010 Society of Plastics Engineers

Surface treated fly ash filled modified epoxy composites

“…It is observed that the impact strength increases up to fly ash loading 30%weight and at 40% weight loading there is a decrease in the impact strength because of the high filler content, the polymer availability for filler interaction may be low [9] . Comparatively, surface modified fly ash composites show higher impact strength than the untreated fly ash because of the better dispersion.…”

“…To provide toughness enhancement, phase separation followed by the slow development of a two-phase morphology is critically important. Therefore, the modification of epoxy should be done to improve its toughening properties and also to get better the dispersion and interfacial bonding of fly ash in epoxy matrix [9] . In this research work modification of fly ash was done using i) surfactant sodium lauryl sulfate and ii) silane coupling agent glycidoxy propyl trimethoxy silane and by iii) size reduction of fly ash was done upto submicron level using high pressure pulverizer.…”

Eco‐friendly cardanol‐based phenalkamine cured epoxy‐cenosphere syntactic foams: Fabrication and characterisation

“…One major setback of this polymeric resin is its poor resistance to crack initiation and growth. This is thus rendered as brittle along with low impact strength …”

“…This is thus rendered as brittle along with low impact strength. 10 The objective of this work was to reduce the brittleness of the epoxy matrix in an eco-friendly way. Here phenalkamine (PA), a new class of curing agent for epoxy was employed.…”

Synthesis of core-shell particles based on hyperbranced polyester and zirconium slag nanoparticles and its influence on the impact resistance of epoxy resin thermosets

“…There are many approaches to improve toughness in epoxy resins [9][10][11][12][13][14][15][16][17][18][19]. One classic route is the addition of nanoparticle fillers, such as layered silicate mineral, SiO 2 , carbon nanotubes, and core-shell nanostructure particles [17,[20][21][22].…”