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Colorimetric sensors

  • US 7,767,143 B2
  • Filed: 06/27/2006
  • Issued: 08/03/2010
  • Est. Priority Date: 06/27/2006
  • Status: Active Grant
First Claim
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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.

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