Understanding Dielectric Cure Monitoring.
Technical rept. Jun-Sep 82,
MASSACHUSETTS INST OF TECH CAMBRIDGE CENTER FOR MATERIALS SCIENCE AND ENGINEERING
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An ideal process monitoring method is one which does not perturb the process, yet somehow provides complete documentation of what is going on. Like all ideals, it is rarely approached in practice, but nevertheless serves to guide the development of suitable methods. The monitoring of the cure of thermosets is a good example. The continuous transition from viscous liquid to rubbery gel to vitreous solid characteristic of thermosets produces such large changes in properties that almost any method of physical measurement can be expected to yield a useful result. In practice, however, techniques such as calorimetry, infrared spectroscopy, and dynamical mechanical measurements, all of which yield highly useful information, tend to be confined to carefully controlled laboratory situations because of the difficulties of in-situ use. For cure monitoring in the manufacturing environment, alternative techniques are needed.
- Test Facilities, Equipment and Methods
- Electricity and Magnetism