MODIFICATION OF POLYCYANURATE NETWORKS WITH PROTIC ADDITIVES BASED ONPOLYDIMETHYLSILOXANE

Hydroxy telechelic caprolactone/polydimethylsiloxane/polycaprolactone triblock copolymers were used to modify aromatic polycyanurate network s through a polycondensation-induced phase separation. Model studies r evealed that the cyclotrimerization mechanism in the presence of alcoh ol functions was complex. The additives, which activate the reaction, are finally chemically linked to the matrix. Both thermodynamic and ki netic features result in very finely divided morphologies, with highly interpenetrated phases which contribute to a great improve of the sta tic mechanical properties.