EPOXY METHACRYLATE

Fig. 8. Flexural properties at elevated temperatures. Laminates constmcted from alternating pHes of 46.7-g (1.5-02) mat and 746-g/m (24-o2/yd ) woven roving at a nominal glass content of 45%. A represents bisphenol fumarate (T = 130° C) B, novolak epoxy methacrylate (T = 130° C) C, epoxy dimethacrylate (T = 100° C) D, isophthaUc resin (T = 100° C) and E, oAy f -phthahc resin (T = 80° C).

VE Epoxy-methacrylate/ styrene Ganem et al., 1994 0.95-1.50 increases with styrene content... 

Figure 8.5 depicts representative ranges of bond strength and elongations for typical structural adhesives such as epoxies, methacrylate, polyurethanes, and silicones. The silyl-epoxy hybrids conveniently fill the gap between the silicones and polyurethanes. 

Vinyl ester resins (VERs, epoxy methacrylates) are a major class of styrenated, free radically curable, corrosion- and chemical-resistant thermoset resins. They are largely used in fiber-reinforced structural applications, and they have a substantial history of long-term service in numerous environments at elevated temperatures and pressures, usually under load. 

Another approach is to prepolymerize an epoxy methacrylate or acrylate to provide an epoxy function that can be cross-linked by acids (29, 30). More elaborate cross-linking mechanisms include oxazolines (31), which can be formed in situ. 

Nonconducting polymers are polymeric binders (epoxy, methacrylate, silicone, araldite) which confer to the conducting composite a certain physical, chemical, or biological stability, while the electrical conductivity is provided by the conducting filler (micro or nanoparticles of platinum, gold, graphite, carbon nanotubes, etc.). 

Rigid carbon-polymer composites are obtained by mixing a carbon filler (such as graphite or CNT) with nonconducting polymeric binders (epoxy, methacrylate, silicone, araldite), obtaining a soft paste that becomes rigid after a curing step. 

Bisphenol A glycidyl methacrylate (bis-GMA) is an epoxy-methacrylate. Sensitization occurs in dentists. 

Many highly crosslinked polymers have been synthesised and reported since the emergence of Bakelite as a synthetic moulding material [6, 7]. However, to keep the subject matter of this chapter within reasonable bounds, we have restricted our discussions of filled polymers to examples of the more common crosslinked matrices, unsaturated polyesters, epoxies, methacrylics and phenolics. The resins are cured by different mechanisms ... 

Shaped articles, e.g. rods, fibers, and films, which are electrically conductive can be manufactured from composites containing a nonconductive flexible chain-carrier polymer and a conjugated polymer (e.g., POT, PDDT, poly-(thienylene vinylene)) [831,832]. Polyester blends containing PT can be used as synthetic fibers [833]. Electrically conductive resin adhesives, heat, stock, and moisture resistant with bifunctionality as adhesives and solders can consist of epoxy methacrylates and conducting polymers, e.g., PDDT, PODT [834,835]. 

Using as starting material five fluorinated diols, Maruno et al. [33] reported the synthesis of fluorine-containing epoxy acrylate resins and epoxy methacrylate resins by the two reactions paths shown in Scheme 3. These resins are suitable as... 

Epoxy-methacrylates containing rubber are possible using CTBN. Again, esterification reactions are useful in producing not only this well-known resin type for structural applications, but also for incorporating rubber into the structure. It is possible that rubber-modified epoxy-acrylates would be similarly useful. 

Other synthetic fibers, as well as natural fibers, were employed in epoxy-based multicomponent systems. Thus, a comparative study between polymeric fibers reinforced epoxy resins and natural fibers reinforced ones, all obtained by UV curing, was performed [186]. Isotactic PP (iPP) fibers modified with 20 wt% EVA and hemp fibers were employed, while the matrices used were epoxy acrylate and epoxy methacrylate. Data indicated that relatively regular distribution of fibers was achieved the addition of fibers caused an increase in Shore hardness of the epoxy methacrylate based composites the epoxy acrylated composites showed a decrease in hardness when EVA-modified iPP fibers were used, whereas hemp fibers caused an opposite effect. Even more, the iPP fibers reinforced photocurable composites displayed a brittle to ductile fracture transition. 

The organic group is either reactive (amino, epoxy, methacrylate, etc.) or an unreactive (methyl, butyl, octyl, phenyl, etc.). Coupling agents, with several different organofunctional types, are eommercially available. Typical commercial coupling agents are listed in Tables 15.1 and 15.2. 

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