ISO/TC 61 Kunststoffe,
ISO/TC 61 Plastics,
ISO/TC 61 Plastiques,
ISO Internationale Organisation für Normung,
ISO International Organization for Standardization,
ISO Organisation Internationale de Normalisation
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Media type:
Standard
Title:
ISO 1061
:
Plastics; unplasticized cellulose acetate; determination of free acidity
Other titles:
Früher unter dem Titel: ISO 1061 (1975-06)
Kunststoffe - Weichmacherfreies Celluloseacetat - Bestimmung der freien Säure (ISO 1061 : 1990)
Plastiques; acétate de cellulose non plastifié; détermination de l'acidité libre
Description:
The free acidity determined by this method includes acidity extractable by water and acidity due to acidic groups directly attached to the cellulose acetate, e.g. carboxyl groups. This method is not suitable for cellulose acetate containing any additives which may affect the test. The principle consists in treating a test portion of cellulose acetate with water and titrating the resultant solution with sodium hydroxide solution. The free acidity is calculated as the percentage, by mass, of free acetic acid in the cellulose acetate. This second edition cancels and replaces the first edition ISO 1061:1975, of which it constitutes a minor technical revision.