Reaction Kinetics of Nanoconfined Linear Epoxy Polymerization: a DSC Study

摘要

The reaction kinetics of a linear epoxy/amine polymerization in bulk and 55 nm native controlled pore glass (CPG) nanopores have been investigated using dynamic differential scanning calorimetry (DSC). The polymerization reaction was found to be accelerated in the nanopores, as indicated by a 90 C decrease in the onset temperature of the nanoconfined reaction. A second order autocatalytic reaction model describes both bulk and nanoconfined data well, but the autocatalytic behavior is considerably weaker in the nanopores. In fact, a non-autocatalytic second order model can describe the nanoconfined reaction kinetics. The initial reaction rate in CPG nanopores is 240-fold faster than in the bulk, presumably due to silanol groups on the CPG nanopores surface.