Bifunctional epoxies

Almost all of the early initiators absorbed well below 200 nm. It was Schle-singer who prepared diazonium salts with an extended spectral range, and with them, was able to polymerize various mono- and bifunctional epoxy monomers, furans, dioxycyclopentadiene, and oxycyclohexene, as well as oligomers and epoxidized novolacs. Dose sensitivities on the order of 15-30 mJ/cm have... 

It is interesting to point out that the observed evolution of the complex viscosity is quite different for both polymerisation types (Figure 2.4). In a step-growth (bifunctional) epoxy-(tetraflinctional) amine system, t] rises continuously with extent of polymerisation gelation occurs near 60% conversion [83]. In the polyester system, rj rises more sharply and at a much lower conversion. 

Based on the optimised parameters for the cure rate law of the bifunctional epoxy-anhydride and the tetrafunctional epoxy-diamine (see previous section), the TTT and the CHT cure diagrams for both systems can be calculated. Figures 2.30 and 2.31 represent the TTT diagrams for both systems. 

A bifunctional epoxy ehaleone monomer was synthesized by reacting 4,4 -dihydroxychalcone with epichlorohydrin. ... 

ZUC Zucchi, I.A., Galante, M.J. Borrajo, J., and Williams, R.J.J., A model system for the thermodynamic analysis of reaction-induced phase separation solutions of polystyrene in bifunctional epoxy/amine monomers (exp. data by LA. Zucchi), Macromol. Chem. Phys., 205, 676, 2004. 

The kinetics of network formation of an amine-terminated linear or three-arm star poly(propylene oxide) and a bifunctional epoxy prepolymer were evaluated by NIR spectroscopy, and the dynamics... 

Shaped articles, e.g. rods, fibers and films, which are electrically conductive, can be produced from composite materials containing a nonconductive flexible chain-carrier polymer and an electrically conductive polymer [e.g. 3-octylPT, 3-dodecylPT or poly(2,5-thiophenediyl vinylene)] [43, 44]. Electrically conductive fibers can manufactured from polyesters blended with PT [45]. Electrically conductive resin adhesives, that are heat, stock and moisture resistant, contain bifunctional epoxy methacrylates as adhesives and solders together with conductive polymers as filler materials (e.g. 3-dodecylPT, 3-octadecylPT) [46, 47]. 

Abt T, Sanchez-Soto M, Martmez de Ilardnya A. Toughening of in-situ polymerized cyclic butylene terephthalate by chain extension with a bifunctional epoxy resin. Eur Polym J 2012 48 163-71. 

The presence of siloxane along with phosphorus moiety in bifunctional epoxy system exhibited synergism in establishing flame retardancy, thermal stability and mechanical properties. Hence, we extended our investigation to find out the effect of siloxane and phosphorus moiety and POSS... 

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