BS 2782-4.433C+D(1997) : 1997
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
METHODS OF TESTING PLASTICS - CHEMICAL PROPERTIES - DETERMINATION OF EPOXY EQUIVALENT OF EPOXY COMPOUNDS
15-05-1999
23-11-2012
1 Scope
2 Definition
2.1 Epoxy equivalent
3 Principle
4 Reagents
4.1 Glacial acetic acid
4.2 Acetic anhydride
4.3 Chloroform
4.4 Potassium hydrogen phthalate
4.5 Crystal violet
4.6 Perchloric acid
4.6.1 Preparation
4.6.2 Standardization
4.6.3 Calculation of the concentration
4.7 Tetraethylammonium bromide solution
5 Apparatus
5.1 Balance
5.2 Conical flask
5.3 Microburette
5.4 Magnetic stirrer
5.5 Thermometer
5.6 Pipette
6 Procedure
7 Expression of results
8 Precision
9 Test report
Annex
A (normative) Modification to epoxyamines
A.1 General
A.2 Principle
A.3 Procedure
A.4 Expression of results
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