Diglycidylether of bisphenol

Diffusion 127 -, anomalous 39, 42-43, 65 Diffusion-reaction model 141 Diffusivity, thermal 149 Diglycidylether of bisphenol-A (DGEBA) 141 Disordered structure 12 Dispersion 9-10,30,32,36,48 Dynamic plowing lithography 153... 

Previous Work on Latent Catalysts for Epoxy Resins. Numerous patents (, , ) have been issued in recent years on the development of latent catalysts for DGEBA (i.e., diglycidylether of bisphenol a ) resins, but most fulfill only a few of the conditions outlined above. One of the most successful of these has been the boron trifluoride-monoethylamine complex ( ). However, one of the serious disadvantages of this particular latent catalyst is the poor electrical properties at elevated temperatures of the epoxy resin in the cured state (7 ). 

The multifunctional monomer with more than two reactive sites per molecule may be either the epoxy monomer or the amine comonomer. Diglycidylether of bisphenol A (DGEBA), with two epoxy groups per molecule, is a typical epoxy monomer (Scheme 28.2). 

The hardener portion (Part B) may also be mixed with fillers, diluents, solvents, and other additives. Fillers may be mixed in the resin portion alone or partly in the resin and partly in the hardener portion. Adhesion promoters such as Dow Corning A-180 silane may also be added to enhance the adhesion of the filler particles to the resin or hardener. Examples include several electrically conductive epoxy formulations that were used to evaluate their electrical stability on non-noble metal surfaces. The base epoxy resin was the diglycidylether of bisphenol-F (DGEBF, equivalent wt. = 170 g). Methylhexahydrophthalic anhydride, hexahydrophthalic anhydride, and 4-methylphthalic anhydride were evaluated as curing agents with 4-methylimidazole as a catalyst. The manufacturing procedure was ... 

Figure 4.15 Infrared spectrum of diglycidylether of bisphenol A epoxy resin.

The reaction between diglycidylether of bisphenol A (DGEBA) and ethylenediamine (EDA).may be considered as an ideal (A4 + B2) polycondensa-... 

There are mainly two families of epoxies the glycidyl epoxies and non-glycidyl epoxies (also called aliphatic or cycloaliphatic epoxy resins). The absence of aromatic rings in aliphatic epoxies makes them UV resistant and suitable for outdoor applications and also reduces viscosity. The most common epoxy monomers of each family are diglycidylether of bisphenol A (known as DGEBA) and 3,4-Epoxycyclohexyl-3 4 -epoxycyclohexane carboxylate (ECC) respectively and their structures are given in Figure 2 (a, b). Cycloaliphatic resins are usually found in the form of pure chemicals with a definite... 

Characterization of epoxies involves much more than the location of the oxirane ring bands. There are many epoxy resins with different structures, different polimerization degrees...etc. IR spectroscopy can be used to characterize the nature of the epoxy. Figure 4 shows the mIR and nIR spectra of two similar epoxy resins Diglycidylether of bisphenol A (DGEBA) and its hydrogenated derivative (HDGEBA). 

Epoxy resins. Most commercially available epoxy resins are based on the diglycidylethers of bisphenol-A, bisphenol-F or other phenolic compounds. A second family of epoxy resins, also used in adhesive formulations, is based on epoxidized olefin compounds such as epoxidized polybutadiene or cycloaliphatic olefins (Fig. Epoxy resins based on the... 

A widely studied nanohybrid system is based on epoxy-siUca [148,149], which is generally prepared upon blending the epoxy monomer and siUca nanoparticles, followed by the addition of a hardener to perform the curing reaction (e.g., diaminodiphenylmethane [150], diaminodiphenylsulfone [151], diethylphosphite [150], PA-amine [152, 153], or hexahydro-4-methylphthalic anhydride [154]). The compatibility between the epoxide compounds and the colloidal silica was optimized upon mixing the diglycidylether of bisphenol-A together with colloidal suspensions of silica nanoparticles dispersed in methylisobutylketraie [150]. 

Puig J et al (2012) Superparamagnetic nanocomposites based on the dispersion of oleic acid-stabilized magnetite nanoparticles in a diglycidylether of bisphenol a-based epoxy matrix magnetic hyperthermia and shape memory. J Phys Chem C 116(24) 13421-13428... 

Dusek, K., Ilavsky, M., tokrova, S., Matejka, L. and Lunak, S, Formation and structure of networks from poly(oxypropylene) polyamines and diglycidylether of Bisphenol A. II. Reactivity of amino groups, gelation,sol fraction and equilibrium modulus. In Cross-linked Epoxies, ed. B. Sedlacek and J. Kahovec. Walter de Gruyter, W. Berlin, 1987, 279. 

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