EN ISO 15023-2:2006

Foreword
1 Scope
2 Normative references
3 Determination of properties
Annex A (normative) Determination of volatile-matter content
Annex B (normative) Determination of sodium acetate content
Annex C (normative) Calculation of ash
Annex D (normative) Determination of degree of hydrolysis
Annex E (normative) Determination of viscosity of 4 % aqueous
        solution by the Brookfield Test method or the
        inclined-tube falling-ball method

ISO 15023-2:2003 specifies the methods to be used in determining the properties of poly(vinyl alcohol), which is normally prepared by hydrolysis of poly(vinyl acetate) and whose composition comprises vinyl alcohol monomeric units and vinyl acetate monomeric units. It is applicable to poly(vinyl alcohol) with a vinyl alcohol unit content (degree of hydrolysis) from 70 mol % to 100 mol %.In addition to the designatory properties specified in ISO 15023-1 (degree of hydrolysis and viscosity of an aqueous solution), ISO 15023-2 includes a number of other properties which are commonly used to specify PVAL materials.