ISO 7327:1994
Plastics — Hardeners and accelerators for epoxide resins — Determination of free acid in acid anhydride
OVERVIEW
The principle of the method specified is reacting a small amount of free acid present in a test portion of acid anhydride hardener or accelerator with rhodamine 6G to colour the test solution pink, measuring the absorbance of the coloured solution at a wavelength of about 510 nm using a spectrometer, determining the free-acid content from a calibration curve. The method is suitable for most anhydrides except for polyester and oligomeric anhydrides which may give too wide a scatter of results.
COMMENTS
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PRODUCT DETAILS
| Status | Current |
|---|---|
| Edition | 1994 |
| No. of Pages | 3 |
| ICS Classification | 83.080.10 Thermosetting materials |
| Committee | ISO/TC 61/SC 12 |
| Available for Purchase | For sale in Singapore only |
| Adoption | ISO |