ASTM D5225-22

Standard Test Method for Measuring Solution Viscosity of Polymers with a Differential Viscometer

SIGNIFICANCE AND USE
5.1 Solution viscosity values for polymers are related to the average molecular size of that portion of the polymer which dissolves in the solvent.
SCOPE
1.1 This test method covers the determination of the solution viscosity of polymers using a differential or the modified differential viscometer. It is applicable to all polymers that dissolve completely without chemical reaction or degradation to form solutions that are stable with time and temperature. Results of the test are usually expressed as specific viscosity, intrinsic viscosity (limiting viscosity number), inherent viscosity (logarithmic viscosity number), or relative viscosity (viscosity ratio).  
1.2 Since there is more than one type of viscometer available to measure a differential pressure, follow the manufacturer’s directions applicable to the equipment being used.  
1.3 The solution viscosity values are comparable with those obtained using a glass capillary of Test Method D2857. This test method differs from the glass capillary in that the solvent and the solution are compared at the same time that a test is run. With a glass capillary, each solution must be referenced back to the solvent run in the same capillary at the same temperature.  
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.  
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 the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For specific hazard statements, see Section 8.
Note 1: There is no known ISO equivalent to this standard.  
1.6 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 31-Aug-2022
• ICS: 83.080.01 - Plastics in general
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.70 - Analytical Methods

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D5225 − 22
Standard Test Method for
Measuring Solution Viscosity of Polymers with a Differential
1
Viscometer
This standard is issued under the fixed designation D5225; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope* mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
1.1 This test method covers the determination of the solu-
tion viscosity of polymers using a differential or the modified
2. Referenced Documents
differential viscometer. It is applicable to all polymers that
2
2.1 ASTM Standards:
dissolve completely without chemical reaction or degradation
D883 Terminology Relating to Plastics
to form solutions that are stable with time and temperature.
D1243 Test Method for Dilute Solution Viscosity of Vinyl
Results of the test are usually expressed as specific viscosity,
Chloride Polymers
intrinsic viscosity (limiting viscosity number), inherent viscos-
D1600 Terminology forAbbreviatedTerms Relating to Plas-
ity (logarithmic viscosity number), or relative viscosity (vis-
tics
cosity ratio).
D2857 Practice for Dilute Solution Viscosity of Polymers
1.2 Since there is more than one type of viscometer avail-
E456 Terminology Relating to Quality and Statistics
able to measure a differential pressure, follow the manufactur-
E691 Practice for Conducting an Interlaboratory Study to
er’s directions applicable to the equipment being used.
Determine the Precision of a Test Method
E2935 Practice for Evaluating Equivalence of Two Testing
1.3 The solution viscosity values are comparable with those
Processes
obtained using a glass capillary of Test Method D2857. This
test method differs from the glass capillary in that the solvent
3. Terminology
and the solution are compared at the same time that a test is
3.1 Definitions:
run. With a glass capillary, each solution must be referenced
3.1.1 For definitions of terms pertaining to plastics used in
back to the solvent run in the same capillary at the same
this test method, refer to Terminology D883. For abbreviations
temperature.
used in this test method, refer to terminology D1600, unless
1.4 The values stated in SI units are to be regarded as
otherwise indicated. For definitions of terms that appear in this
standard. No other units of measurement are included in this
test method relating to quality and statistics, refer to Terminol-
standard.
ogy E456.
1.5 This standard does not purport to address all of the
3.1.2 inherent viscosity, n—the ratioof the natural logarithm
safety concerns, if any, associated with its use. It is the
of the relative viscosity to the concentration. The IUPAC term
responsibility of the user of this standard to establish appro-
for inherent viscosity is logarithmic viscosity number.
priate safety, health, and environmental practices and deter-
3.1.3 intrinsicviscosity,n—limitofthereducedandinherent
mine the applicability of regulatory limitations prior to use.
viscosities as the concentration of the polymeric solute ap-
For specific hazard statements, see Section 8.
proaches zero and represents the capacity of the polymer to
NOTE 1—There is no known ISO equivalent to this standard. increase viscosity. The IUPAC term for intrinsic viscosity is
limiting viscosity number.
1.6 This international standard was developed in accor-
dance with internationally recognized principles on standard-
3.1.4 reduced viscosity, n—the ratio of the specific viscosity
ization established in the Decision on Principles for the to the concentration. Reduced viscosity is a measure of the
Development of International Standards, Guides and Recom-
specific capacity of the polymer to increase the relative
viscosity. The IUPAC term for reduced viscosity is viscosity
number.
1
This test method is under the jurisdiction ofASTM Committee D20 on Plastics
2
and is the direct responsibility of Subcommittee D20.70 on Analytical Methods. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Sept. 1, 2022. Published September 2022. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1992. Last previous edition approved in 2017 as D5225 - 17. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D5225-22. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D5225 − 17 D5225 − 22
Standard Test Method for
Measuring Solution Viscosity of Polymers with a Differential
1
Viscometer
This standard is issued under the fixed designation D5225; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope*
1.1 This test method covers the determination of the solution viscosity of polymers using a differential or the modified differential
viscometer. It is applicable to all polymers that dissolve completely without chemical reaction or degradation to form solutions that
are stable with time and temperature. Results of the test are usually expressed as specific viscosity, intrinsic viscosity (limiting
viscosity number), inherent viscosity (logarithmic viscosity number), or relative viscosity (viscosity ratio).
1.2 Since there is more than one type of viscometer available to measure a differential pressure, follow the manufacturer’s
directions applicable to the equipment being used.
1.3 The solution viscosity values are comparable with those obtained using a glass capillary of Test Method D2857. This test
method differs from the glass capillary in that the solvent and the solution are compared at the same time that a test is run. With
a glass capillary, each solution must be referenced back to the solvent run in the same capillary at the same temperature.
1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
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 the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of
regulatory limitations prior to use. For specific hazard statements, see Section 8.
NOTE 1—There is no known ISO equivalent to this standard.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D883 Terminology Relating to Plastics
D1243 Test Method for Dilute Solution Viscosity of Vinyl Chloride Polymers
D1600 Terminology for Abbreviated Terms Relating to Plastics
D2857 Practice for Dilute Solution Viscosity of Polymers
1
This test method is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.70 on Analytical Methods.
Current edition approved Dec. 1, 2017Sept. 1, 2022. Published January 2018September 2022. Originally approved in 1992. Last previous edition approved in 20142017
as D5225 - 14.D5225 - 17. DOI: 10.1520/D5225-17.10.1520/D5225-22.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D5225 − 22
E456 Terminology Relating to Quality and Statistics
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E2935 Practice for Evaluating Equivalence of Two Testing Processes
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms pertaining to plastics used in this test method, refer to Terminology D883. For abbreviations used
in this test method, refer to terminology D1600, unless otherwise indicated. For definitions of terms that appear in this test method
relating to quality and statistics, refer to Terminology E456.
3.1.2 inherent viscosity—viscosity, n—the ratio of the natural logarithm of the relative viscosity to the concentration. The IUPAC
term for inherent viscosity is logarithmic viscosity number.
3.1.3 intrinsic viscosity—viscosity, n—limit of the reduced and inherent viscosities as the concentration of the polymeric solute
approaches zero and represents the capacity of the polymer to increase visc
...