ASTM-D3900 Standard Test Methods for Rubber—Determination of Ethylene Units in Ethylene-Propylene Copolymers (EPM) and in Ethylene-Propylene-Diene Terpolymers (EPDM) by Infrared Spectrometry

ASTM-D3900 - 2017 R21 EDITION - CURRENT
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Standard Test Methods for Rubber—Determination of Ethylene Units in Ethylene-Propylene Copolymers (EPM) and in Ethylene-Propylene-Diene Terpolymers (EPDM) by Infrared Spectrometry
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Scope

1.1 These infrared test methods cover the determination of the proportion of ethylene and propylene units in ethylene-propylene copolymers (EPM) and ethylene-propylenediene terpolymers (EPDM) over the range from 35 to 85 mass % ethylene. Four test methods are needed to encompass the variety of commercial polymers that contain additives or polymerized diene units that interfere with the various infrared peaks. Except when interferences are present, all four test methods should give similar results. The test methods appear in the following order:

1.1.1 Pressed Film Test Methods

Sections
Test Method A-For EPM and EPDM between 35 and 65 mass % ethylene8-13
Test Method B-For EPM and EPDM between 60 and 85 mass % ethylene, except for ethylene/propylene/1,4-hexadiene terpolymers14-18
Test Method C-For all EPM and EPDM polymers between 35 and 85 mass % ethylene, using near infrared24-31

1.1.2 Cast Film Test Methods:

Test Method D-For all EPM and EPDM polymers between 35 and 85 mass % ethylene, except for ethylene/propylene/1,4-hexadiene terpolymers24-31

1.2 These test methods are not applicable to oil-extended EPDM unless the oil is first removed in accordance with Test Method D.

1.3 The values stated in SI units are to be regarded as the standard.

1.4This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

Keywords

ethylene-propylene copolymers; ethylene-propylene-diene terpolymers; infrared; ICS Number Code 83.040.10 (Latex and raw rubber)

To find similar documents by ASTM Volume:

09.01 (Rubber, Natural and Synthetic -- General Test Methods; Carbon Black)

To find similar documents by classification:

83.040.10 (Latex and raw rubber)

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Document Number

ASTM-D3900-17R21

Revision Level

2017 R21 EDITION

Status

Current

Modification Type

Reapproval

Publication Date

Dec. 14, 2021

Document Type

Test Method

Page Count

11 pages

Committee Number

D11.11