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ASTM D6086-05

(Test Method)

Standard Test Method for Carbon Black—Void Volume (VV)

Standard Test Method for Carbon Black—Void Volume (VV)

SIGNIFICANCE AND USE
The void volume of a carbon black expressed in absolute terms, VV, is a carbon black property that reflects differences in structure for candidate carbon blacks. Structure is a generic term that is a function of the shape irregularity and deviation from sphericity of carbon black aggregates. The more that a carbon black resists compression by having substantial aggregate irregularity and non-sphericity, the greater the compressed volume and void volume.
Structure is a property that influences the physical properties developed in carbon black compounds for use in tires, mechanical rubber goods, and other manufactured rubber products.
SCOPE
1.1 This test method covers a procedure to measure a carbon black property called Void Volume. The void volume is obtained by measuring the compressed volume of a weighed sample contained in a cylindrical chamber when a specified compression force is applied by a movable piston with a displacement transducer on the piston mechanism.
1.2 Void volume is an important carbon black property that relates to the compounded physical properties for carbon black-filled elastomers.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 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.

General Information

Status
Historical
Publication Date
30-Apr-2005
ICS
71.060.10 - Chemical elements
Technical Committee
D24 - Carbon Black
Drafting Committee
D24.11 - Carbon Black Structure
Current Stage
Ref Project

Relations

Replaces
ASTM D6086-97 - Standard Test Methods for Carbon Black--Compressed Volume Index
Effective Date
01-May-2005
Replaced By
ASTM D6086-08 - Standard Test Method for Carbon Black<span class='unicode'>&#x2014;</span>Void Volume (VV)
Effective Date
01-Jul-2008

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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D6086–05
Standard Test Method for
1
Carbon Black—Void Volume (VV)
This standard is issued under the fixed designation D6086; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.2 theoretical volume (carbon black), n—thevolumethat
a specific mass of carbon black particles with no voids, for
1.1 Thistestmethodcoversaproceduretomeasureacarbon
practical purposes, is given by the ratio of the mass to the
black property called Void Volume. The void volume is
density, when the density is determined by an accepted test.
obtained by measuring the compressed volume of a weighed
3.1.3 void volume (carbon black), n—a measure of the
sample contained in a cylindrical chamber when a specified
irregularity and non-sphericity of carbon black aggregate
compression force is applied by a movable piston with a
particles, it is expressed as the difference, (compressed
displacement transducer on the piston mechanism.
volume-theoretical volume) for a mass of carbon black, the
1.2 Void volume is an important carbon black property that
differential volume is normalized to a selected unit mass.
relates to the compounded physical properties for carbon
3.1.3.1 Discussion—The aggregate irregularity resists com-
black-filled elastomers.
pression and thus the compressed volume is a function of the
1.3 The values stated in SI units are to be regarded as the
degree of this irregularity. The compressed void volumes are
standard. The values given in parentheses are for information
specifictothecompressedvolumemeasuringinstrumentandto
only.
the conditions of test.
1.4 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. Summary of Test Method
responsibility of the user of this standard to establish appro-
4.1 Thecompressedvolumeofaweigheddrytestsampleof
priate safety and health practices and determine the applica-
a candidate carbon black is obtained in a void volume
bility of regulatory limitations prior to use.
instrument under calibration test conditions. From the com-
2. Referenced Documents pressedvolume,thevoidvolumeisobtainedbysubtractingthe
2
theoretical volume.
2.1 ASTM Standards:
D1799 Practice for Carbon Black—Sampling Packaged
5. Significance and Use
Shipments
5.1 The void volume of a carbon black expressed in
D1900 Practice for Carbon Black—Sampling Bulk Ship-
absolute terms, VV, is a carbon black property that reflects
ments
differences in structure for candidate carbon blacks. Structure
3. Terminology is a generic term that is a function of the shape irregularity and
deviation from sphericity of carbon black aggregates. The
3.1 Definitions of Terms Specific to This Standard—Referto
more that a carbon black resists compression by having
Sections 4 and 9 for a more complete understanding of the use
substantial aggregate irregularity and non-sphericity, the
of these terms in this test method.
greater the compressed volume and void volume.
3.1.1 compressed volume (carbon black), n—the volume
5.2 Structure is a property that influences the physical
that a mass of carbon black occupies when it is contained in a
properties developed in carbon black compounds for use in
specified cylindrical chamber and subjected to a specified
tires, mechanical rubber goods, and other manufactured rubber
compression force by a movable piston.
products.
1
This test method is under the jurisdiction of Committee D24 on Carbon Black 6. Apparatus
and are the direct responsibility of Subcommittee D24.11 on Carbon Black
6.1 Analytical Balance,orequivalent,capableofaweighing
Structure.
sensitivity of 0.1 mg.
Current edition approved May 1, 2005. Published May 2005. Originally
approved in 1997. Last previous edition approved in 1997 as D6086-97.
6.2 Gravity Convection Drying Oven, capable of maintain-
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
ing 125 6 5°C.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
6.3 Weighing Dish, Camel Hair or Similar Brush,tobeused
Standards volume information, refer to the standard’s Document Summary page on
for weighing the samples.
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D6086–05
2
6.4 Void Volume Instrument, to be used to measure the
V 5 h 33.1416 D /4000 (1)
A
compressed volume of carbon blacks from which the void
volume is calculated. The void volume instrument or device
where:
shall conform to the following generic specifications and be
V =
...

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