G - Physics – 01 – N
Patent
G - Physics
01
N
354/29, 358/5, 7
G01N 21/35 (2006.01) B29C 35/02 (2006.01) D04H 1/00 (2006.01) G01N 21/31 (2006.01)
Patent
CA 1203995
ABSTRACT The degree of cure of a traveling carbonaceous polymeric material (on 48), formed (at 34) from a plurality of chemical reactants (32) and subjected to a curing process (at 42 and 44) is determined by directing (with 86 and 88) into the traveling material radiations including a first infrared radiation (A1) from the group thereof adapted to selectively interact with molecular resonance vibrations at frequencies that are characteristic of respective terminal functional groups of atoms involved in reactions that take place in the material during the curing process. Also directed into the material is a second infrared radiation that is either of the kind (R) that does not exhibit substantial selective interaction with molecular resonance vibrations in the material or of the kind (A2) that is adapted to selectively interact with molecular resonance vibrations at a frequency that is characteristic of groups of atoms forming the backbones of the polymeric molecules in the material. Received (at 102) from the traveling material are radiations (148) that have interacted with the material. Produced (at 116, 118 and 122) from the received radiations are first and second responses to the first and second radiations. Produced (at 122) is a third response that is a function of the mass of the polymeric material interacting with the radiations. Produced (at 122) from the first, second and third responses is an output response (140, 82) that is correlated with the degree of cure effected by the curing process.
437835
G. Ronald Bell & Associates
Owens Corning
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