ASTM_D_3529_-_16_2021.pdf

Designation:D352916(Reapproved 2021)Standard Test Methods forConstituent Content of Composite Prepreg1This standard is issued under the fixed designation D3529;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.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.Scope1.1 This test method covers the determination of the fibercontent,fiber areal weight,matrix solids content and matrixcontent of composite material prepregs.Optionally,the matrixsolids content can also be determined after a volatiles contenthas been established.Volatiles content,if appropriate andrequired,is determined by means of Test Method D3530.1.2 Procedure A of this test method applies to compositeprepreg of primarily thermosetting matrices that can be ex-tracted in organic solvent.The reinforcement and filler must besubstantially insoluble in the selected extraction reagent.Thisprocedure may also be used for the same purposes to extractother matrix material types.1.3 Procedure B of this test method uses ignition loss of acomposite prepreg matrix and applies to organic matrix com-posite systems containing reinforcing fibers that do not changemass when exposed to the matrix combustion method.1.4 This test method assumes a two-part material system(plus volatiles)and does not distinguish between hybridreinforcements or matrices.Use with hybrid composites islimited to determination of total reinforcement or total matrixcontent.1.5 Matrix solids determination for Procedures A or B usesTest Method D3530 to determine volatiles content.1.6 Alternate techniques for determining constituent contentinclude Test Methods C613(resin content by Soxhlet extrac-tion)and D3171(used principally for consolidated laminates).1.7 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.8 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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.Specific precautionary information is given in Sections 8 and 9.1.9 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2C613 Test Method for Constituent Content of CompositePrepreg by Soxhlet ExtractionD883 Terminology Relating to PlasticsD3171 Test Methods for Constituent Content of CompositeMaterialsD3530 Test Method for Volatiles Content of CompositeMaterial PrepregD3878 Terminology for Composite MaterialsE177 Practice for Use of the Terms Precision and Bias inASTM Test Methods2.2 NFPA Standard:3NFPA 86 Standard for Ovens and Furnaces3.Terminology3.1 DefinitionsTerminology D3878 defines terms relatingto composite materials.Terminology D883 defines termsrelating to plastics.Practice E177 defines terms relating tostatistics.In the event of a conflict between terms,TerminologyD3878 shall have precedence over the other documents.3.1.1 fiber content,nthe amount of fiber present in acomposite or prepreg expressed either as percent by weight orpercent by volume.This is sometimes stated as a fraction,thatis,fiber volume fraction.See Terminology D3878.3.1.2 matrix content,nthe amount of matrix present in acomposite or prepreg expressed either as percent by weight or1This test method is under the jurisdiction of ASTM Committee D30 onComposite Materials and is the direct responsibility of Subcommittee D30.03 onConstituent/Precursor Properties.Current edition approved Sept.1,2021.Published October 2021.Originallyapproved in 1976.Last previous edition approved in 2016 as D3529 16.DOI:10.1520/D3529-16R21.2For 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 website.3Available from National Fire Protection Association(NFPA),1 BatterymarchPark,Quincy,MA 02269-9101.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1percent by volume.For po