Polymerization of triallyl cyanurate-polyester resins

Differential thermal analysis data and infrared spectra are utilized to establish the mechanism by which a particular triallyl cyanurate‐polyester (Vibrin 135) resin polymerizes. It is shown that approximately one‐fourth of the polyester double bonds are of the furnarate type and that only these are capable of homopolymerization. In Vibrin 135, however, all of the polyester double bonds polymerize, along with two of the triallyl cyanurate double bonds, giving rise to one exothermic peak. From the nature of this polymerization it is inferred that a substantial amount of copolymerization occurs. Polymerization of the final triallyl cyanurate double bond, along with isomerization to the polymerized triallyl isocyanurate form, gives rise to a second exothermic peak. Correlation of measured heats of polymerization and infrared data tends to substantiate the proposed mechanism.