1、Designation:E155909Standard Test Method forContamination Outgassing Characteristics of SpacecraftMaterials1This standard is issued under the fixed designation E1559;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last rev
2、ision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method covers a technique for generating datato characterize the kinetics of the release of outgassingproducts from mater
3、ials.This technique will determine boththe total mass flux evolved by a material when exposed to avacuum environment and the deposition of this flux on surfacesheld at various specified temperatures.1.2 This test method describes the test apparatus and relatedoperating procedures for evaluating the
4、total mass flux that isevolved from a material being subjected to temperatures thatare between 298 and 398 K.Pressures external to the sampleeffusion cell are less than 7 103Pa(5 105torr).Deposition rates are measured during material outgassing tests.A test procedure for collecting data and a test m
5、ethod forprocessing and presenting the collected data are included.1.3 This test method can be used to produce the datanecessary to support mathematical models used for the predic-tion of molecular contaminant generation,migration,anddeposition.1.4 All types of organic,polymeric,and inorganic materi
6、alscan be tested.These include polymer potting compounds,foams,elastomers,films,tapes,insulations,shrink tubing,adhesives,coatings,fabrics,tie cords,and lubricants.1.5 There are two test methods in this standard.Test MethodA uses standardized specimen and collector temperatures.TestMethod B allows t
7、he flexibility of user-specified specimen andcollector temperatures,material and test geometry,and user-specified QCMs.1.6 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.7 This standard does not purport to address all of thes
8、afety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2E595 Test Method for Total Mass L
9、oss and Collected Vola-tile Condensable Materials from Outgassing in a VacuumEnvironment2.2 Military Standard:MIL-P-27401D Propellant Pressurizing Agent,Nitrogen32.3 Other Standard:SMC-TR-9528 Non-VolatileResidueSolventReplacement,Report No.TR95(5448)-143.Terminology3.1 Definitions:3.1.1 AT cut crys
10、tal,na quartz crystal orientation thatminimizes the temperature coefficient(frequency change ver-sus temperature)over a wide range of temperature.3.1.2 azeotropic mixture,na solution of two or moreliquids,the composition of which does not change upondistillation.Also known as azeotrope.3.1.3 collect
11、ed volatile condensable material,CVCM,n(from Test Method E595).The quantity of outgassed matterfrom a test specimen that condenses on a collector maintainedat a specific constant temperature for a specified time andmeasured before and after the test outside the chamber.3.1.3.1 DiscussionCVCM is spec
12、ific to Test Method E595and is calculated from the condensate mass determined fromthe difference in mass of the collector plate before and after thetest in a controlled laboratory environment.CVCM is ex-pressed as a percentage of the initial specimen mass.The viewfactor is not considered;so all the
13、VCM outgassing from the1This test method is under the jurisdiction of ASTM Committee E21 on SpaceSimulation and Applications of Space Technology and is the direct responsibility ofSubcommittee E21.05 on Contamination.Current edition approved April 1,2009.Published May 2009.Originallyapproved in 1993
14、.Last previous edition approved in 2003 as E1559 03.DOI:10.1520/E1559-09.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM w
15、ebsite.3Available from Standardization Documents Order Desk,Bldg.4 Section D,700Robbins Ave.,Philadelphia,PA 19111-5094,Attn:NPODS.4Available from The Aerospace Corporation,P.O.Box 92957,Los Angeles,CA900092957,http:/www.aero.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Co
16、nshohocken,PA 19428-2959.United States1 sample may not be collected.Care should be used in compar-ing the CVCM from Test Method E595 with VCM from thistest method.3.1.4 differential scanning calorimetry,DSC,na tech-nique in which the difference in energy inputs into a substanceand a reference material is measured as a function of tempera-ture while the substance and reference material are subjected toa controlled-temperature program.3.1.5 effusion cell,na container,placed in a vacuum,inwhich a s
