Methods of testing plastics. Chemical properties Determination of ash of unplasticized cellulose acetate

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Hardcopy , PDF

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English

Published date

30-04-1991

Publisher

British Standards Institution

NO CONTENTS SECTION

Procedures at two different calcination temperatures.

1.1 This part of ISO 3451 specifies a method for determining the ash, consisting of inorganic residue, yielded by unplasticized cellulose acetate.

1.2 This method applies to unplasticized cellulose acetate free of additives, fillers, dyes or other materials which may affect the result.

1.3 When plasticizers, additives, fillers or dyes which may affect the result are present, they shall be separated by a method agreed between the interested parties.

1.4 The ash content at 575 ± 25 °C is a reasonable measure of the mineral salts and inorganic foreign matter in the cellulose acetate. The weight of ash obtained varies with the temperature of ignition. Higher temperatures such as 850 °C will convert calcium carbonate and other carbonates to the oxides and thus give lower values for the ash. The composition of ash may vary with the pulping process used in manufacture, which limits the significance of the ash determination in absolute terms.

Committee	PRI/21
DevelopmentNote	Also numbered as ISO 3451-3 Supersedes 80/52357 DC (06/2005)
DocumentType	Standard
Pages	8
PublisherName	British Standards Institution
Status	Current

BS 2880:1991

Methods of testing cellulose acetate flake

BS 2782-0:1982	Methods of testing plastics Introduction
BS 2782-4 Method 470A:1991	Methods of testing plastics. Chemical properties Determination of ash (general methods)
ISO 585:1990	Plastics Unplasticized cellulose acetate Determination of moisture content

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BS 2782-4:Method 470C:1991

Current

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General Product Information

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