Frontal cationic curing of epoxy resins

Abstract

We studied the frontal curing of trimethylolpropane triglycidyl ether (TMPTGE) using two BF 3 -amine initiators and two fillers, kaolin and fumed silica. In the case of kaolin, the range of concentrations allowing for frontal polymerization to propagate was dependent on its heat absorption effect whereas in the case of silica it was a consequence of the rheological features of this additive. However, for both systems the velocity and front temperature show the same trends; in all cases front velocities were on the order of 1 cm/min with front temperatures about 200 C.

Successful radical induced cationic frontal polymerization of epoxy-based monomers by C–C labile compounds

“…7,8 This leads to thermally induced bulk polymerization with a moving reaction front and allows different types of filler materials. 7,8 This leads to thermally induced bulk polymerization with a moving reaction front and allows different types of filler materials.…”

Preparation and interaction study between fullerene and graphene in a polymeric matrix

“…It is well known that a wide (UV and visible) absorption range is desirable for organic photovoltaics [20,[27][28][29][30][31][32][33]. Frontal Polymerization (FP) is a polymerization technique that allows the conversion of a monomer into a polymer by formation and consequent propagation of a localized reaction zone [7,8,11,[34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52]. The resulting polymerization front is able to self-sustain and propagate along the whole reactor.…”

Thermal frontal polymerization with a thermally released redox catalyst

“…18 Although most studies have focused on free-radical chemistry, other reaction mechanisms can be used, including urethane formation, 26 ring-opening metathesis polymerization, 27 and frontal epoxy curing. [28][29][30][31] A significant challenge for free-radical frontal polymerization is how to achieve a long pot life and a low front temperature. If we rely on the Arrhenius kinetics of the initiator decomposition, we must trade off pot life for front temperature, that is, a longer pot life means that the front temperature must be allowed to reach a higher value.…”