ASTM_F_942_-_02_2013.pdf

Designation:F94202(Reapproved 2013)Standard Guide forSelection of Test Methods for Interlayer Materials forAerospace Transparent Enclosures1This standard is issued under the fixed designation F942;the number immediately following the designation indicates the year of originaladoption or,in the case of revision,the year of last revision.Anumber in parentheses indicates the year of last reapproval.Asuperscriptepsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This guide summarizes the standard test methods avail-able for determining physical and mechanical characteristics ofinterlayer materials used in multi-ply aerospace transparentenclosures.1.2 Interlayer materials are used to laminate glass-to-glass,glass-to-plastic,and plastic-to-plastic.Interlayer materials arebasically transparent adhesives with high-quality optical prop-erties.They can also serve as an energy absorbing medium,afail-safe membrane to contain cockpit pressure and to prevententry of impact debris;a strain insulator to accommodatedifferent thermal expansion rates of members being laminatedand as an adherent to prevent spalling of inner surface plymaterial fragments.The relative importance of an interlayercharacteristic will be a function of the prime use it serves in itsparticular application.1.3 This guide,as a summary of various methods in Section2,is intended to facilitate the selection of tests that can beapplied to interlayer materials.1.4 The test methods listed are for use in determining basicdesign characteristics and in assuring lot-to-lot uniformity ofthe materials being tested except as noted in 3.3.1.5 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 heal practices and determine the applicabilityof regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C177 Test Method for Steady-State Heat Flux Measure-ments and Thermal Transmission Properties by Means ofthe Guarded-Hot-Plate ApparatusD149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power FrequenciesD412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionD542 Test Method for Index of Refraction of TransparentOrganic PlasticsD570 Test Method for Water Absorption of PlasticsD696 Test Method for Coefficient of Linear Thermal Expan-sion of Plastics Between 30C and 30C with a VitreousSilica DilatometerD792 Test Methods for Density and Specific Gravity(Rela-tive Density)of Plastics by DisplacementD1003 Test Method for Haze and Luminous Transmittanceof Transparent PlasticsD1004 Test Method for Tear Resistance(Graves Tear)ofPlastic Film and SheetingD1045 Test Methods for Sampling and Testing PlasticizersUsed in PlasticsD1204 Test Method for Linear Dimensional Changes ofNonrigid Thermoplastic Sheeting or Film at ElevatedTemperatureD1824 Test Method for Apparent Viscosity of Plastisols andOrganosols at Low Shear RatesD2240 Test Method for Rubber PropertyDurometer Hard-nessD2766 Test Method for Specific Heat of Liquids and SolidsD2857 Practice for Dilute Solution Viscosity of PolymersD3167 Test Method for Floating Roller Peel Resistance ofAdhesivesD3465 Test Method for Purity of Monomeric Plasticizers byGas ChromatographyD3835 Test Method for Determination of Properties ofPolymeric Materials by Means of a Capillary RheometerE1640 Test Method for Assignment of the Glass TransitionTemperature By Dynamic Mechanical AnalysisF520 Test Method for Environmental Resistance of Aero-space Transparencies to Artificially Induced ExposuresF521 Test Methods for Bond Integrity of Transparent Lami-nates1This guide is under the jurisdiction ofASTM Committee F07 on Aerospace andAircraft and is the direct responsibility of Subcommittee F07.08 on TransparentEnclosures and Materials.Current edition approved Dec.1,2013.Published December 2013.Originallyapproved in 1985.Last previous edition approved in 2008 as F942 08.DOI:10.1520/F0942-02R13.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 F1164 Test Method for Evaluation of Transparent PlasticsExposed to Accelerated Weathering Combined with Bi-axial StressF1316 Test Method for Measuring the Transmissivity ofTransparent PartsF1362 Test Method for Shear Strength and Shear Modulusof Aerospace Glazing Interlayer Materials3.Significance and Use3.1 This guide is intended for use by material suppliers,aircrafttransparentenclosurefabricators,airframemanufacturers,government agencies,and others that maybecome involved in the testing of transparent interlayer mate-rials.These test metho