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ASTM F2466-05

(Practice)

Standard Practice for Determining Silicone Volatiles in Silicone Rubber for Transportation Applications

Standard Practice for Determining Silicone Volatiles in Silicone Rubber for Transportation Applications

SCOPE
1.1 This practice covers a means to determine the percent silicone-producing volatiles present in heat-cured silicone rubber and room temperature-cured silicones (RTV).
1.2 Silicone-producing volatiles contribute to fouling of oxygen sensor systems used in the control of vehicle emissions.
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
28-Feb-2005
ICS
55.020 - Packaging and distribution of goods in general
Technical Committee
F03 - Gaskets
Drafting Committee
F03.50 - Analytical Test Methods
Current Stage
Ref Project

Relations

Replaced By
ASTM F2466-10 - Standard Practice for Determining Silicone Volatiles in Silicone Rubber for Transportation Applications
Effective Date
01-May-2010

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ASTM F2466-05 - Standard Practice for Determining Silicone Volatiles in Silicone Rubber for Transportation ApplicationsASTM F2466-05 - Standard Practice for Determining Silicone Volatiles in Silicone Rubber for Transportation Applications
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ASTM F2466-05 - Standard Practice for Determining Silicone Volatiles in Silicone Rubber for Transportation Applications
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:F2466–05
Standard Practice for
Determining Silicone Volatiles in Silicone Rubber for
Transportation Applications
This standard is issued under the fixed designation F2466; 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 cyclo dimethyl-siloxane. Other species present having GC
retentiontimessimilartothoseofthecyclicsareassumedtobe
1.1 This practice covers a means to determine the percent
silicone as well.
silicone-producing volatiles present in heat-cured silicone
rubber and room temperature-cured silicones (RTV).
5. Apparatus
1.2 Silicone-producing volatiles contribute to fouling of
5.1 GasChromatograph,equippedwithadualcolumn,dual
oxygen sensor systems used in the control of vehicle emis-
thermal conductivity detectors, differential flow control, linear
sions.
temperature programming capability, and an appropriate 1 mV
1.3 This standard does not purport to address all of the
potentiometric recorder.An alternative unit may be the equiva-
safety concerns, if any, associated with its use. It is the
lent of a Hewlett Packard 5880A, equipped with a flame
responsibility of the user of this standard to establish appro-
ionization detector, or as agreed upon between producer and
priate safety and health practices and determine the applica-
user.
bility of regulatory limitations prior to use.
5.2 Column,tobeusedwiththefirstGCis2.4mby0.32cm
2. Referenced Documents stainless steel with a 5 % OV-101 coating and 80/100 Chro-
mosorbW, HP.The HP5880Atype GC uses a column 60 m by
2.1 ASTM Standards:
0.25 mm with 0.25-1 µm DB-1 or SE30 fused silica capillary
D3182 Practice for Rubber—Materials, Equipment, and
column or equivalent.
Procedures for Mixing Standard Compounds and Prepar-
5.3 Operating conditions for first GC type are:
ing Standard Vulcanized Sheets
5.3.1 Column—50 to 320°C at 10°C/min.
3. Summary of Practice
5.3.2 Injector—290°C.
5.3.3 Detector—290°C.
3.1 This practice consists of four (4) basic steps: (1) the
5.3.4 He Flow Velocity—4 cm/s.
silicone is cured to its elastomeric form, (2) the volatiles are
5.3.5 Sample Size—40 µL.
extracted from the cured material, (3) the extract is separated
5.4 Operating conditions for the alternative GC type are:
and measured by gas chromatography (GC), and (4) the GC
5.4.1 Column—60 to 250°C at 10°C/min.
results are quantified using a siloxane calibration.
5.4.2 Injector—250°C.
4. Significance and Use
5.4.3 Detector—300°C.
5.4.4 He Flow Velocity—1-2 mL/min (column flow).
4.1 Use of this practice in conjunction with realistic maxi-
5.4.5 Sample Size—1 µL.
mum volatility tolerance level can help minimize the risk of
5.5 Helium or Nitrogen, for the carrier gas.
oxygen sensor dysfunction from formed-in-place-sealants in
5.6 Humidity Chamber, or controlled lab environment.
transportationapplications.Thispracticeprovidesamethodfor
5.7 Wrist-Action Mechanical Shaker.
determination of percentage volatiles in silicone elastomers.
5.8 Analytical Balance, with glass draft shield capable of
The volatile silicones from a commercial silicone are primarily
0.0001 g accuracy.
5.9 30-mL Vials, flint glass, with screw cap (polyethylene
ThispracticeisunderthejurisdictionofASTMCommitteeF03onGasketsand
lined).
is the direct responsibility of Subcommittee F03.50 on Analytical Test Methods.
5.10 Syringe, capable of accurately delivering 20 6 0.1 µL
Current edition approved March 1, 2005. Published April 2005. DOI: 10.1520/
(no plastic elements used due to solvents used).
F2466-05.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.11 Solvents and standards used are pentane (99 %) and
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
dodecane (99 %), both spectral grade.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F2466–05
5.12 Rigid Plates (glass or aluminum), 0.90 mm thick, for 8. Conditioning
cutting the wet formed-in-place sealant.
8.1 Allow RTV samples to cure for 24 h, but not to exceed
5.13 Automated devices shall be used for measuring and
72 h at 25°C and 50 6 10 % relative humidity.
calculating peaks.
9. Procedure
9.1 Extraction—Pre-weigh each cured sample to 1.0 6 0.2
6. Test Specimens
g (record weight to the nearest 0.0001 g) and set aside.
6.1 Heat-cured silicone rubber samples shall be procured
9.2 Weigh 0.020 6 0.005 g of dodecane (record weight to
from either actual production parts, or shall be compression-
the nearest 0.0001 g) and place sample into the 30-mLvial. To
molded ASTM tensile plaques (Practice D3182). Cure condi-
this add 10 mLof pentane. Immediately place the pre-weighed
tionsofthetensileplaquesshallmirrorcureconditionsusedon
sample into the vial, and seal the container to prevent evapo-
the product
...

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Standard Practice for Determining Silicone Volatiles in Silicone Rubber for Transportation Applications

SIGNIFICANCE AND USE
4.1 Use of this practice in conjunction with realistic maximum volatility tolerance level can help minimize the risk of oxygen sensor dysfunction from formed-in-place-sealants in transportation applications. This practice provides a method for determination of percentage volatiles in silicone elastomers. The volatile silicones from a commercial silicone are primarily cyclo dimethyl-siloxane. Other species present having GC retention times similar to those of the cyclics are assumed to be silicone as well.
SCOPE
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4.1 The purpose of this guide is to provide direction for uniform conditioning methodology when conducting special preparations of plastic packagings as prescribed for conducting United Nations (UN) drop test. This guide provides a uniform approach for conditioning of plastic packaging intended for liquid hazardous materials (dangerous goods).  
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SCOPE
1.1 This guide is intended to provide a standardized method and a set of basic instructions for special preparation conditioning of drop test samples being subjected to United Nations (UN) performance-oriented packaging certification as required by United States Department of Transportation Title 49 Code of Federal Regulations (49 CFR) and the United Nations Recommendations on the Transport of Dangerous Goods (UN).  
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1.3 The user of this guide shall be trained in accordance with 49 CFR §172.700 and other applicable hazardous materials regulations including: the International Civil Aviation Organization (ICAO) Technical Instructions for the Safe Transport of Dangerous Goods by Air, the International Maritime Dangerous Goods Code (IMDG Code), and carrier rules such as the International Air Transport Association (IATA) Dangerous Goods Regulations.  
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4.1 This practice covers the requirements for the commercial preservation, packaging, packing (exterior container), unitization, and marking for supplies and equipment. It provides for multiple handling and shipment by any mode, and storage periods of a minimum of one year in enclosed facilities without degradation or damage to the product within the container. It also provides for package quantities suitable for redistribution without additional repackaging or marking. Planned storage that exceeds one year requires more than minimum requirements for physical and mechanical protection.  
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SCOPE
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SCOPE
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5.1 Regulations prescribing the test procedures for hazardous materials packaging allow for the substitution of non-hazardous fill materials for packaging performance tests with certain limitations prescribed and guidance offered (see 49 CFR 178.602(c)). This regulatory guidance has proven to be flexible enough, in common industry practice, to produce variations in the selection of fill materials for package performance tests sufficient to cause inconsistent and non-repeatable test results. This variation creates significant problems in product liability, packaging selection and regulatory enforcement in this highly regulated industry. Use of this guide should enhance uniformity in test procedures.  
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This guide identifies the key information required to ensure that selected packaging will pass the United Nations (UN) packaging certification at the level that is appropriate for its intended use. This guide covers test procedures for transportation of hazardous material packagings for net masses except those used for infectious substances, radioactive materials, cylinders, and other receptacles for gases and does not replace domestic or international requlatory requirements for hazardous material packagings. The UN performance tests are based on the degree of hazard posed by the proposed materials to be packaged which are also assigned to a specific packing group. Only packaging designs that meet the UN performance standards are to be marked with a UN mark. Tests include drop test, leakproofness test, stack test, vibration test, pressure differential test, hydrostatic pressure test, and cobb water absorption test.
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SCOPE
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Standard Terminology of Packaging and Distribution Environments

SCOPE
1.1 This terminology is a compilation of definitions of technical terms used in the packaging and distribution environments. Terms that are generally understood or adequately found in other readily available sources are not included.  
1.2 A definition is a single sentence with additional information included in discussions.  
1.3 Definitions that are identical to those published by another standards organization or ASTM committee are identified with the name of the organization or ASTM committee.  
1.4 The definitions in this terminology are grouped into related areas under principal concepts. The broad descriptor term for each group is followed in alphabetical order by narrower terms and related terms. Cross-references are included where the concept group is not obvious.  
1.5 Terminology related to flexible barrier packaging is found in Terminology F17.  
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SIGNIFICANCE AND USE
5.1 This test method allows for the measurement of the torque retention properties of container/continuous thread closure systems of various designs, materials, and manufacture, and is suitable for package development and engineering evaluation.  
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SCOPE
1.1 These test methods evaluate the torque retention of continuous thread closures on containers with matching finishes, for predetermined environmental conditions over time. Methods are defined for both Type I, style “A” push down and turn Type II2 child resistant and non child resistant type closures.  
1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
Note 1: The SI unit system is the recommended system.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.  
1.4 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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