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ASTM D5376-06

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Standard Test Method for Rubber Compounding Materials—Determination of the Basic Nitrogen Content in Rubber Antioxidant: Polymerized TMQ

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1.1 This test method covers the determination of the nitrogen content of polymerized 2,2,4-trimethyl-1,2-dihydroquinoline (TMQ). It is based on a potentiometric titration of an acetone solution of TMQ with perchloric acid in acetic acid.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard

1.3 This 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. Specific precautionary statements are given in Section 9.


This test method is designed to determine the nitrogen content of oligomeric 2,2,4-trimethyl-1,2-dihydroquinoline (TMQ) antioxidant. TMQ is used for heat protection of vulcanized rubber.

This test method is suitable for assessing product specifications since nitrogen content is related to product performance, that is, antioxidant efficiency and heat protection. For comparison of product quality at different production facilities sufficient interlaboratory accuracy and precision are required.

SDO ASTM: ASTM International
Document Number D5376
Publication Date Oct. 1, 2006
Language en - English
Page Count 4
Revision Level 06
Supercedes
Committee D11.11
Publish Date Document Id Type View
Oct. 1, 2006 D5376-06 Revision
Nov. 1, 2021 D5376-06R21 Reaffirmation
May 1, 2017 D5376-06R17 Reaffirmation
May 1, 2012 D5376-06R12 Reaffirmation
Dec. 10, 2002 D5376-93R02 Reaffirmation
May 10, 1998 D5376-93R98 Reaffirmation