ASTM F942-93 - 1.1.1993
 
1. Scope

1.1 This guide summarizes the standard test methods available for determining physical and mechanical characteristics of interlayer materials used in multi-ply aerospace transparent enclosures.

1.2 Interlayer materials are used to laminate glass-to-glass, glass-to-plastic, and plastic-to-plastic. Interlayer materials are basically transparent adhesives with high-quality optical properties. They can also serve as an energy absorbing medium, a fail-safe membrane to contain cockpit pressure and to prevent entry of impact debris; a strain insulator to accommodate different thermal expansion rates of members being laminated and as an adherent to prevent spalling of inner surface ply material fragments. The relative importance of an interlayer characteristic will be a function of the prime use it serves in its particular application.

1.3 This guide, as a summary of various methods in Section 2, is intended to facilitate the selection of tests that can be applied to interlayer materials.

1.4 The test methods listed are for use in determining basic design characteristics and in assuring lot-to-lot uniformity of the materials being tested except as noted in 3.3.

 
2. Referenced Documents

D1204-14(2020)

Standard Test Method for Linear Dimensional Changes of Nonrigid Thermoplastic Sheeting or Film at Elevated Temperature

D1824-16

Standard Test Method for Apparent Viscosity of Plastisols and Organosols at Low Shear Rates

D2240-15(2021)

Standard Test Method for Rubber Property—Durometer Hardness

D2766-95(2000)

Standard Test Method for Specific Heat of Liquids and Solids

D2857-22

Standard Practice for Dilute Solution Viscosity of Polymers

D3167-10(2017)

Standard Test Method for Floating Roller Peel Resistance of Adhesives

D3465-21

Standard Guide for Purity of Monomeric Plasticizers by Gas Chromatography

D3835-16

Standard Test Method for Determination of Properties of Polymeric Materials by Means of a Capillary Rheometer

E1640-23

Standard Test Method for Assignment of the Glass Transition Temperature By Dynamic Mechanical Analysis

F520-21

Standard Test Method for Environmental Resistance of Aerospace Transparencies to Artificially Induced Exposures

F521-22

Standard Test Methods for Bond Integrity of Transparent Laminates

F1164-19

Standard Test Method for Evaluation of Transparent Plastics Exposed to Accelerated Weathering Combined with Biaxial Stress

F1316-18(2023)

Standard Test Method for Measuring the Transmissivity of Transparent Parts

F1362-18(2023)

Standard Test Method for Shear Strength and Shear Modulus of Aerospace Glazing Interlayer Materials

C177-19e1

Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Guarded-Hot-Plate Apparatus (Includes all amendments and changes 2/23/2023).

D149-20

Standard Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies

D412-16(2021)

Standard Test Methods for Vulcanized Rubber and Thermoplastic Elastomers—Tension

D542-22

Standard Test Method for Index of Refraction of Transparent Organic Plastics

D570-22

Standard Test Method for Water Absorption of Plastics

D696-16

Standard Test Method for Coefficient of Linear Thermal Expansion of Plastics Between -30°C and 30°C with a Vitreous Silica Dilatometer

D792-20

Standard Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement

D1003-21

Standard Test Method for Haze and Luminous Transmittance of Transparent Plastics

D1004-21

Standard Test Method for Tear Resistance (Graves Tear) of Plastic Film and Sheeting

D1045-19

Standard Test Methods for Sampling and Testing Plasticizers Used in Plastics