The effect of post-mould curing on the mechanical properties of instant-setting poly(urethane-isocyanate) polymers

The effect of post-mould curing on selected properties of instant-setting poly(urethaneisocyanate) polymers was investigated. The changes in tensile, flexural and impact strength as a function of annealing, cooling rate and thickness were determined. Generally, the process of annealing was found to increase the tensile and structural strength by about 5%. The extent of this improvement depends on variables such as the thickness of the specimen, …