Standard Test Method for
Acid Content of Ethylene-Acrylic Acid Copolymers1

This standard is issued under the fixed designation D 4094; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.

1. Scope *

1.1 This test method covers the determination of the acid
content of ethylene-acrylic acid (EAA) copolymers containing
2.5 to 25 weight % of acrylic acid.

1.2 The values stated in SI units are to be regarded as the
standard. The values given in parenthesis are for information
only.

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 hazardsstatements are given in Section 8.
NOTE 1—There is no similar or equivalent ISO standard.

2. Referenced Documents

2.1 ASTM Standards:
D 1898 Practice for Sampling of Plastics2
E 177 Practice for Use of the Terms Precision and Bias in
ASTM Test Methods3
E 691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method3
IEEE/ASTM SI–10 Standard for Use of the International
System of Units (SI): The Modern Metric System4

3. Terminology

3.1 Units and symbols used in this test method are those
recommended in IEEE/ASTM SI–10. Additional acronyms
unique to this test method are defined in the text.

4. Summary of Test Method

4.1 In this test method, a weighed specimen is dissolved in
a suitable hot solvent and titrated while hot with standard base
to a visual equivalence point.

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