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Dynamic dielectric analysis for nondestructive cure monitoring and process control (1986)

Delos, S. E. ; Whitham, M. E. ; Kranbuehl, D. E. ; [et al.]

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Publication Date: 2019-07-13

Description: Dynamic dielectric analysis (DDA) is an effective in situ NDE method that can monitor the reaction status in thermosets and the phase changes in thermoplastics, including slow reactions occuring late in the cure cycle and recrystallization during annealing. The effects of moisture and resin history on reaction rate can also be determined, as can ionic and dipolar contributions. The ionic mobility parameter is noted to be an excellent monitor of viscosity above the glass transition temperature. The ability of DDA to monitor cure rate variations in a thick section during autoclaving has been demonstrated.

Keywords: INSTRUMENTATION AND PHOTOGRAPHY

Type: Advanced composites: The latest developments; Nov 18, 1986 - Nov 20, 1986; Dearborn, MI; United States

Format: text

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