Patent ID: 7767143
Filing Date: 2010-08-03
Classification: G01J,H01L

Abstract:
1. A colorimetric sensor for measuring exposure to radiation or thermal energy, said colorimetric sensor comprising: a support substrate; a reflective surface on said support substrate; and a curable layer over said reflective surface, said curable layer comprising a functionalized polymer having pendant free-radically polymerizable groups, the functionalized polymer comprising the reaction product of (i) a polymer reactant having functional groups thereon, the functional group selected from a nucleophilic group or an electrophilic group and (ii) a bifunctional reactant comprising a reactive group capable of undergoing a nucleophilic/electrophilic reaction with the functional groups of the polymer reactant and at least one pendant free-radically polymerizable group; wherein said sensor undergoes polymerization of said pendant free-radically polymerizable groups resulting in a change in one or more optical properties upon exposure to (i) a threshold amount of radiation or (ii) a threshold amount of thermal energy.