1、Designation:D212615Standard Test Method forResponse of Rigid Cellular Plastics to Thermal and HumidAging1This standard is issued under the fixed designation D2126;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revis
2、ion.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope*1.1 This test method covers procedures for the ther
3、mal andhumid exposure of rigid cellular plastics.Conditions used shallbe agreed upon between the purchaser and the supplier.NOTE1A list of commonly used exposure conditions is found inTable 1.1.2 The values stated in SI units are to be regarded as thestandard.The values in parentheses are for inform
4、ation only.1.3 This standard does not purport to address all of thesafety 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.NOTE2Th
5、is test method is equivalent to ISO 2796 in the samplingand calculation sections.It is not equivalent to ISO 2796 in the proceduresection.2.Referenced Documents2.1 ASTM Standards:2D883 Terminology Relating to PlasticsD1037 Test Methods for Evaluating Properties of Wood-Base Fiber and Particle Panel
6、Materials2.2 ISO Standard:ISO 2796 Cellular Plastics Rigid-Test for Dimensional Sta-bility33.Terminology3.1 The terms given in Terminology D883 are applicable tothis test method.4.Significance and Use4.1 Because of the wide variety of potential uses of rigidcellular plastics,artificial exposure to e
7、stimate the effectivebehavior of these materials must be based,to a great extent,onthe intended application.Toward this end,this test method isintended to recommend a variety of conditions from which oneor more of the desired exposure conditions can be selected.(Note 3)4.2 The conditions recommended
8、 in this test method havebeen widely used in artificially exposing rigid cellular plasticsand in determining the effects of various temperatures andhumidities on these materials.Final test measurements aredetermined after the specimens return to room temperature.Where specified,the specimens will be
9、 tested at the exposurecondition,but must be reported as such.4.3 Dimensional changes measured by this test method canbe used to compare the performance of materials in a particularenvironment,to assess the relative stability of two or morecellular plastics,or to specify an acceptance criterion for
10、aparticular material.The results of this test method are notsuitable for predicting end-use product performance orcharacteristics,nor are they adequate for engineering or designcalculations.NOTE3Where thermal shock is known or suspected to occur due torapid heating to(or cooling from)a particular te
11、mperature,guidance onthe permissible heating or cooling rates,or both,shall be obtained fromthe manufacturer of the material concerned.NOTE4The dimensional change of a specimen can vary dependingupon the age of the sample or the length of time between specimenpreparation and the beginning of the tes
12、t,or both.4.4 Before proceeding with this test method,reference shallbe made to the specification of the material being tested.Anytest specimen preparation,conditioning,dimensions,or testingparameters covered in the materials specification,or combina-tion thereof,shall take precedence over those men
13、tioned in thistest method.If there are no specifications,then the defaultconditions apply.5.Apparatus5.1 Balance,capable of weighing,to 0.05%,a test speci-men having a mass of 100 g or less.1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility
14、of Subcommittee D20.22 on Cellular Materials-Plastics and Elastomers.Current edition approved Oct.1,2015.Published October 2015.Originallyapproved in 1962.Last previous edition approved in 2009 as D2126-09.DOI:10.1520/D2126-15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcont
15、act ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.*A Summary of Chan
16、ges section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.2 Oven,circulating-air,capable of holding the requiredtemperature of exposure within 62C(4F).5.3 Cold Box,capable of maintaining the required tempera-ture of exposure within 63C(5F).5.4 Gauge,dial-type,with a minimum foot area of 6.5 cm2(1 in.2)(Note 5).A vernier caliper having graduations notlarger than 0.1 mm(0.005 in.)can also be used.C
