ISO 1599:1990

Plastics — Cellulose acetate — Determination of viscosity loss on moulding ISO 1599:1990

Publication date:   Nov 15, 1990

General information

90.60 Close of review   Mar 4, 2024

ISO

ISO/TC 61/SC 9 Thermoplastic materials

International Standard

83.080.20   Thermoplastic materials

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Scope

This method is suitable for cellulose acetate which does not contain additives, fillers, etc. which may interfere with the determination of viscosity. It is suitable for cellulose acetate having an acetic acid yield above 50 %. Cellulose acetate plasticized with dimethyl phthalate is moulded under specified conditions of temperature, pressure and time. After cooling, the moulding is ground up. The viscosity ratio of the ground material from the moulding and also that of the original cellulose acetate material are determined in accordance with ISO 1157. The percentage viscosity loss is calculated from the values of viscosity before and after moulding. This second edition cancels and replaces the first edition ISO 1599:1975.

Life cycle

PREVIOUSLY

WITHDRAWN
ISO 1599:1975

NOW

PUBLISHED
ISO 1599:1990
90.60 Close of review
Mar 4, 2024