Rubber-modified polystyrene impact as a function of flame-retardant additive solubilization

Thermal optical analysis (TOA) is employed to study the solubilization of organic flame‐retardant additives in high‐impact polystyrene. The TOA approach (1) indicates the minimum temperature at which solubilization will occur; (2) yields information on how the composite will process; and (3) can be used to generate an equation that describes the kinetics of solubilization. Multiaxial impact strength increases proportionally as additive solubilization increases. The fundamental significance of the kinetic equation is discussed. Other applications of TOA are suggested.