Jeremiah Hubbard - Curing of a Bisphenol-E Based Cyanate Ester Using Magnetic Nanoparticles as an Internal Heat Source through Induction Heating

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      Curing of a   Bisphenol-E Based Cyanate Ester Using Magnetic Nanoparticles as   an Internal Heat Source through Induction Heating. Hubbard,   Jeremiah W.; Orange,   François; Guinel, Maxime J.-F.;  Guenthner, Andrew J.; Mabry, Joseph M.; Sahagun,   Christopher M.; Rinaldi, Carlos. ACS Appl. Mater.   Interfaces 2013, 5(21),   11329-11335


      We report on the control of cyclotrimerization forming a   polycyanurate polymer using magnetic iron oxide nanoparticles in   an alternating-current (ac) field as an internal heat source,   starting from a commercially available monomer. Magnetic   nanoparticles were dispersed in the monomer and catalytic system   using sonication, and the mixture was subjected to an alternating   magnetic field, causing the magnetic nanoparticles to dissipate   the energy of the magnetic field in the form of heat. Internal   heating of the particle/monomer/catalyst system was sufficient to   start and sustain the polymerization reaction, producing a   cyanate ester network with conversion that compared favorably to   polymerization through heating in a conventional laboratory oven.   The two heating methods gave similar differential scanning   calorimetry temperature profiles, conversion rates, and glass   transition temperatures when using the same temperature profile.   The ability of magnetic nanoparticles in an ac field to drive the   curing reaction should allow for other reactions forming   high-temperature thermosetting polymers and for innovative ways   to process such polymers.

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