Organoclay-Filled Vinyl Ester Monomer Toughened Epoxy-Intercrosslinked Matrix Materials

Abstract

A vinyl ester monomer (VEM), namely cyclohexyl-1,1 0 -bis[4-(c-2-methylphenoxy)-a-hydroxypropylacrylate], was synthesized from 1, 1-bis (3-methyl-4-glycidyloxyphenyl) cyclohexane, and acrylic acid via nucleophilic addition. The structure of VEM was confirmed by FTIR, 1 H, 13 C NMR, and electron impact-mass spectroscopy. Diglycidyl ethers of bisphenol-A (DGEBA) epoxy resin were toughened with varying percentages of 5, 10, and 15% (by wt) VEM using 4, 4 0 -diaminodiphenylmethane (DDM). VEM-modified epoxy systems were further modified with organophilic montmorillonite (OMMT) clay. OMMT clay-filled hybrid VEM-epoxy resin systems, developed in the form of casting, were characterized for their mechanical, thermomechanical, dielectric, and morphological properties.

Characterization of Mechanical and Fracture Behaviour in Nano-Silicon Carbide-Reinforced Vinyl-Ester Nanocomposites

“…Thus, vinyl-ester resins that combine the most sought-after properties of epoxies and unsaturated polyesters are favoured by the industry [7] . In recent years, nanoparticles such as carbon nanotubes [8] , nanoclay [9][10][11] , iron oxide nanoparticles [12] and cupric-oxide nanoparticles [7] as rigid reinforcements within vinyl-ester matrix have attracted widespread attention. However, few studies have investigated the mechanical properties of vinyl-ester when reinforced with silicon carbide nanoparticles [1,13] .…”

Thermo-mechanical and surface properties of POSS reinforced structurally different diamine cured epoxy nanocomposites

“…10,11 Our research group has published several articles based on modications of epoxy resin with different kinds of tougheners, polymeric intermediates and curatives to make epoxy resin suitable for high performance industrial applications. 12,13 The properties such as crosslink density, molecular exibility, spatial conguration and free volume in the network of the matrix are vary with nature of amine skeleton, curatives, which include functionally aliphatic, aromatic nature and exible ether linkage in the molecular structure, etc. 14 The effect of crosslinking on the glass transition temperature (T g ) is one of the fundamental indicators on the properties of the cured matrix.…”

Toughening of Poly(ethylene terephthalate) and Optimizing of the Compatibilization Between PET and EPDM by Functionalized EPDM

“…Ester groups, and terminal carbonyl and hydroxyl groups, that were inherently present or formed by thermal decomposition, may participate in interchange reactions [13][14][15] , esterification [16] , amidation, etc. Some researchers have described approaches for improving the toughness of PET by the reaction of a polymer containing an appropriate chemical functionality with the carboxyl or hydroxyl end groups of PET during melt processing [17][18][19][20][21][22] .…”