ASTM D5492-17
(Test Method)Standard Test Method for Determination of Xylene Solubles in Propylene Plastics
Standard Test Method for Determination of Xylene Solubles in Propylene Plastics
SIGNIFICANCE AND USE
5.1 The results of this test provide a relative measure of the total soluble fraction of polypropylene homopolymers and copolymers. The soluble fraction approximately correlates to the amorphous fraction in the polypropylene. Xylene is widely used for determining the soluble fraction in polypropylene as it is more specific to the atactic fraction than other solvents. The concentration of a soluble fraction obtained with a specific solvent has been found to relate closely to the performance characteristics of a product in certain applications, for example film and fiber. Data obtained by one solvent and at one precipitation time cannot be compared with data obtained by another solvent or precipitation time, respectively.
SCOPE
1.1 This test method is to be used for determining the 25°C xylene-soluble fraction of polypropylene homopolymers and copolymers.
1.2 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.
Note 1: This test method is technically equivalent to ISO 16152.
1.3 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.
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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: D5492 − 17
Standard Test Method for
1
Determination of Xylene Solubles in Propylene Plastics
This standard is issued under the fixed designation D5492; 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* 3. Terminology
3.1 Definitions:
1.1 This test method is to be used for determining the 25°C
xylene-soluble fraction of polypropylene homopolymers and
3.1.1 For definitions of plastic terms see Terminology D883
copolymers.
and for abbreviations see Terminology D1600.
1.2 This standard does not purport to address all of the
3.2 Definitions of Terms Specific to This Standard:
safety concerns, if any, associated with its use. It is the
3.2.1 soluble-fraction (S )—the percentage of the polymer
S
responsibility of the user of this standard to establish appro-
mass that does not precipitate out when the polymer solution is
priate safety, health and environmental practices and deter-
cooledfromrefluxtemperatureto+25 60.5°Candheldatthat
mine the applicability of regulatory limitations prior to use.
temperature for a specified period of time.
NOTE 1—This test method is technically equivalent to ISO 16152.
4. Summary of Test Method
1.3 This international standard was developed in accor-
4.1 A weighed amount of sample is dissolved in xylene
dance with internationally recognized principles on standard-
under reflux conditions. The solution is cooled under con-
ization established in the Decision on Principles for the
trolled conditions and maintained at a +25°C equilibrium
Development of International Standards, Guides and Recom-
temperature so that the crystallization of the insoluble fraction
mendations issued by the World Trade Organization Technical
takes place. When the solution is cooled the insoluble portion
Barriers to Trade (TBT) Committee.
precipitates and is isolated by filtration. The xylene is evapo-
rated from the filtrate, leaving the soluble fraction in the
2. Referenced Documents
residue. The percentage of this fraction in the plastic is
2
2.1 ASTM Standards:
determined gravimetrically.
D883 Terminology Relating to Plastics
D1600 TerminologyforAbbreviatedTermsRelatingtoPlas-
5. Significance and Use
tics
5.1 The results of this test provide a relative measure of the
E456 Terminology Relating to Quality and Statistics
total soluble fraction of polypropylene homopolymers and
E691 Practice for Conducting an Interlaboratory Study to
copolymers. The soluble fraction approximately correlates to
Determine the Precision of a Test Method
the amorphous fraction in the polypropylene. Xylene is widely
E2935 Practice for Conducting Equivalence Testing in
used for determining the soluble fraction in polypropylene as it
Laboratory Applications
is more specific to the atactic fraction than other solvents. The
2.2 ISO Standard:
concentration of a soluble fraction obtained with a specific
ISO 16152 Plastics—Determination of Xylene Solubles of
solvent has been found to relate closely to the performance
3
Polypropylene
characteristics of a product in certain applications, for example
film and fiber. Data obtained by one solvent and at one
precipitation time cannot be compared with data obtained by
1
This test method is under the jurisdiction ofASTM Committee D20 on Plastics
another solvent or precipitation time, respectively.
and is the direct responsibility of Subcommittee D20.15 on Thermoplastic Materi-
als.
6. Interferences
Current edition approved Aug. 1, 2017. Published August 2017. Originally
approved in 1994. Last previous edition approved in 2010 as D5492 - 10. DOI:
6.1 It is possible that materials with solubilities similar to
10.1520/D5492-17.
2
the soluble fraction, such as additives, can interfere with the
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
measurement of solubles. When present in concentrations that
Standards volume information, refer to the standard’s Document Summary page on
are judged to impart a significant error to the soluble-fraction
the ASTM website.
3
data, the level of interference must be determined and correc-
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
4th Floor, New York, NY 10036. tions made.
*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
------------
...
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: D5492 − 10 D5492 − 17
Standard Test Method for
1
Determination of Xylene Solubles in Propylene Plastics
This standard is issued under the fixed designation D5492; 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 is to be used for determining the 25°C xylene-soluble fraction of polypropylene homopolymers and
copolymers.
1.2 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.
NOTE 1—This test method is technically equivalent to ISO 16152.
1.2 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.
NOTE 1—This test method is technically equivalent to ISO 16152.
1.3 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
D1600 Terminology for Abbreviated Terms Relating to Plastics
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 Conducting Equivalence Testing in Laboratory Applications
2.2 ISO Standard:
3
ISO 16152 Plastics—Determination of Xylene Solubles of Polypropylene
3. Terminology
3.1 Definitions:
3.1.1 For definitions of plastic terms see Terminology D883 and for abbreviations see Terminology D1600.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 soluble-fraction (S )—the percentage of the polymer mass that does not precipitate out when the polymer solution is
S
cooled from reflux temperature to +25 6 0.5°C and held at that temperature for a specified period of time.
4. Summary of Test Method
4.1 A weighed amount of sample is dissolved in xylene under reflux conditions. The solution is cooled under controlled
conditions and maintained at a +25°C equilibrium temperature so that the crystallization of the insoluble fraction takes place. When
1
This test method is under the jurisdiction of ASTM Committee D20 on Plastics and is the direct responsibility of Subcommittee D20.15 on Thermoplastic Materials.
Current edition approved Aug. 1, 2010Aug. 1, 2017. Published September 2010August 2017. Originally approved in 1994. Last previous edition approved in 20062010
as D5492 - 06.D5492 - 10. DOI: 10.1520/D5492-10.10.1520/D5492-17.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036.
*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
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D5492 − 17
the solution is cooled the insoluble portion precipitates and is isolated by filtration. The xylene is evaporated from the filtrate,
leaving the soluble fraction in the residue. The percentage of this fraction in the plastic is determined gravimetrically.
5. Significance and Use
5.1 The results of this test provide a relative measure of the total soluble fraction of polypropylene homopolymers and
copolymers. The soluble fraction approximately correlates to the amorphous fraction in the polypropylene. Xylene is widely used
for determining the soluble fraction in polypropylene as it is more specific to the atactic fraction than other solvents. The
concentration of a soluble fraction obtained with a specific solvent has been found to relate closely t
...
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