Monitoring technology

Details Monitoring technology Monitoring technology

1987-02-03

1989-01-17

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

Infrared responsive

250227, 250339, 374 53, G01N 2135, G01N 2184

Patent

active

047989548

ABSTRACT:
A process for infrared spectroscopic monitoring of insitu compositional changes in a polymeric material comprises the steps of providing an elongated infrared radiation transmitting fiber that has a transmission portion and a sensor portion, embedding the sensor portion in the polymeric material to be monitored, subjecting the polymeric material to a processing sequence, applying a beam of infrared radiation to the fiber for transmission through the transmitting portion to the sensor portion for modification as a function of properties of the polymeric material, monitoring the modified infrared radiation spectra as the polymeric material is being subjected to the processing sequence to obtain kinetic data on changes in the polymeric material during the processing sequence, and adjusting the processing sequence as a function of the kinetic data provided by the modified infrared radiation spectra information.

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Young, Bland and Chang, Resin Characterization in Cured Graphite Fiber Reinforced Composites Using Diffues Reflectance-FTIR, 28th Nat. SAMPE Symp., 28, 824 (1983).
Young and Chang, Pregreg Cure Monitoring Using Diffuse Reflectance-FTIR, 16th Nat. SAMPE Tech. Conf., 16, 136 (1984).
Young and Chang, FTIR Characterization of Advanced Materials, 31st Nat. SAMPE Symp. (1986).
A. M. Noskov and V. N. Gogolev, "Investigation of the Kinetics of Epoxy Resin Hardening by a Method Which Excludes Their Reaction with the Material of the Container" Zhurnal Prikladnoi Spektroskopii, vol. 20, No. 1, (Jan. 1974), pp. 89-91.

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