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ASTM D2121

Standard Test Methods for Polymer Content of Styrene Monomer and Alpha-Methylstyrene

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Organization: ASTM
Publication Date: 1 January 1995
Status: inactive
Page Count: 3
ICS Code (Aromatic hydrocarbons): 71.080.15
scope:

1. Scope

1.1 These test methods cover the determination of the polymer content of styrene monomer and α-Methylstyrene (AMS). It should be noted, however, that dimers and trimers are not measured by these test methods.

1.2 Test Method A, which is based on the use of a spectro-photometer or photometer, is intended for the quantitative determination of the polymer content of styrene monomer or AMS in concentrations up to 15 mg/kg. Samples containing more than 15 mg/kg of polymer must be suitably diluted before measurement.

1.3 Test Method B is a rapid visual procedure that is intended for the approximate evaluation of polymer to a maximum concentration of 1.0 weight %. Samples having a polymer content of 1.0 weight % or greater should be suitably diluted prior to measurement.

1.4 The following applies to all specified limits in this standard: for purposes of determining conformance with this standard, an observed value or a calculated value shall be rounded off "to the nearest unit" in the last right-hand digit used in expressing the specification limit, in accordance with the rounding-off method of Practice E 29.

1.5 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 8.

Document History

June 1, 2016
Standard Test Methods for Polymer Content of Styrene Monomer
These test methods cover the determination of the polymer content of styrene monomer. It should be noted, however, that dimers and trimers are not measured by these test methods. Test Method A,...
March 15, 2015
Standard Test Methods for Polymer Content of Styrene Monomer
These test methods cover the determination of the polymer content of styrene monomer. It should be noted, however, that dimers and trimers are not measured by these test methods. Test Method A,...
January 1, 2007
Standard Test Methods for Polymer Content of Styrene Monomer and AMS (Alpha Particle-Methylstyrene)
These test methods cover the determination of the polymer content of styrene monomer and AMS (a–Methylstyrene). It should be noted, however, that dimers and trimers are not measured by these test...
June 10, 2000
Standard Test Methods for Polymer Content of Styrene Monomer and AMS (Alpha Particle-Methylstyrene)
1. Scope 1.1 These test methods cover the determination of the polymer content of styrene monomer and AMS (α - Methylstyrene). It should be noted, however, that dimers and trimers are not measured by...
ASTM D2121
January 1, 1995
Standard Test Methods for Polymer Content of Styrene Monomer and Alpha-Methylstyrene
1. Scope 1.1 These test methods cover the determination of the polymer content of styrene monomer and α-Methylstyrene (AMS). It should be noted, however, that dimers and trimers are not measured by...
May 25, 1990
STANDARD TEST METHODS FOR POLYMER CONTENT OF STYRENE MONOMER
A description is not available for this item.
March 30, 1984
STANDARD TEST METHODS FOR POLYMER CONTENT OF STYRENE MONOMER
A description is not available for this item.
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