Electrochemical impedance spectroscopy (EIS) has been used to determine the water absorption characteristics of polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polyaromatic amide (Aramid), and amine-quinone polyurethane (AQ) free-standing polymer films. A method for calculating per
โฆ LIBER โฆ
Electrical sensing of shelf-cure properties of polymeric prepreg materials
โ Scribed by Barry M. Lunt; R. Scott Merrell; A. Brent Strong; Mark R. Cox
- Publisher
- John Wiley and Sons
- Year
- 1997
- Tongue
- English
- Weight
- 158 KB
- Volume
- 64
- Category
- Article
- ISSN
- 0021-8995
No coin nor oath required. For personal study only.
โฆ Synopsis
Most polymeric thermoset materials change (cure) slowly as they lie in storage; a prime example of this is composite prepreg materials. These changes are generally vitrification, and are not readily observable using some of the standard curemonitoring methods, such as DSC and FTIR, which sense mainly the gelation process. Evidence of this observation is presented, along with the successful results of an effort to monitor this shelf-cure process using a simplified resistivity meter.
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