ASTM D788-14

    Standard Classification System for Poly(Methyl Methacrylate) (PMMA) Molding and Extrusion Compounds

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    1. Scope

    1.1 The purpose of this classification system is to provide a method of adequately identifying PMMA materials using a system consistent with that of Classification System D4000. It further provides a means for specifying these materials by the use of a simple line callout designation.

    1.2 This classification system covers poly(methyl methacrylate) molding and extrusion compounds. These compounds are polymers based on methyl methacrylate, and at least 70 % of the polymer shall be polymerized from methyl methacrylate.

    1.3 The properties in this classification system are those required to identify the compositions covered. Other requirements necessary to identify particular characteristics important to specific applications shall be described by using the suffixes as given in Section 5.

    1.4 Acrylic molding and extrusion compounds are used frequently in applications where extreme clarity and the ability to retain that clarity and color under severe weathering and other environmental exposures are of primary significance. While the test specimen properties of this document extend to the evaluation of nonvirgin materials, the user must take precautions to ensure that parts made from these materials meet the desired end-use requirements. Accordingly, this specification allows for the use of those acrylic plastic materials that can be recycled, reconstituted, and reground provided the following:

    1.4.1 The requirements as stated in this specification are met,

    1.4.2 The material has not been modified in any way to alter its conformance to food contact regulations or similar requirements, and

    1.4.3 The requirements of the particular end-use application are met.

    1.5 This classification system and subsequent line callout (specification) are not intended for the selection of materials, but only as a means to call out plastic materials to be used for the manufacture of parts. The selection of these materials is to be made by personnel with expertise in the plastics field in which the environment, inherent properties of the materials, performance of the parts, part design, manufacturing process, and economics are considered.

    Note 1: This classification system is similar to ISO 8257-1:1987 in title only. The technical content is significantly different.

    1.6 The values stated in SI units are to be regarded as standard.

    1.7 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    D149 Test Method for Dielectric Breakdown Voltage and Dielectric Strength of Solid Electrical Insulating Materials at Commercial Power Frequencies

    D150 Test Methods for AC Loss Characteristics and Permittivity (Dielectric Constant) of Solid Electrical Insulation

    D257 Test Methods for DC Resistance or Conductance of Insulating Materials

    D618 Practice for Conditioning Plastics for Testing

    D883 Terminology Relating to Plastics

    D1003 Test Method for Haze and Luminous Transmittance of Transparent Plastics

    D1238 Test Method for Melt Flow Rates of Thermoplastics by Extrusion Plastometer

    D1600 Terminology for Abbreviated Terms Relating to Plastics

    D3641 Practice for Injection Molding Test Specimens of Thermoplastic Molding and Extrusion Materials

    D3892 Practice for Packaging/Packing of Plastics

    D4000 Classification System for Specifying Plastic Materials

    E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications

    ISO Standards and Recommendations

    ISO 179 PlasticsDetermination of Charpy Impact PropertiesPart 1: Non-Instrumented Impact Test

    ISO 306

    ISO 489 PlasticsDetermination of the Refractive Index of Transparent Plastics

    ICS Code

    ICS Number Code 83.140.99 (Other rubber and plastic products)

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/D0788-14

    Citation Format

    ASTM D788-14, Standard Classification System for Poly(Methyl Methacrylate) (PMMA) Molding and Extrusion Compounds, ASTM International, West Conshohocken, PA, 2014,

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