NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Measurement of the degree of cure in epoxies with ultrasonic velocityThe use of ultrasonic longitudinal velocity values to measure the degree of cure (defined for an epoxide system as the concentration of epoxide/amine bonds divided by the initial epoxide concentration) in epoxy resins is investigated. The experimental setup used to measure the changes in longitudinal velocity with time is described, together with the technique used to calculate the degree of cure from the acoustic data, using the principle of additive module. Measurements were done with diglycidyl ether of bisphenol A epoxy resin cured with an amine adduct agent. Good qualitative agreement was shown between the time dependence of the acoustically measured degree of cure and the predicted rate of reaction.
Document ID
19870023468
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Winfree, W. P.
(NASA Langley Research Center Hampton, VA, United States)
Parker, F. R.
(NASA Langley Research Center Hampton, VA, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1986
Subject Category
Nonmetallic Materials
Accession Number
87A10742
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available