塑料 - 聚（甲基丙烯酸甲酯）（pmma）成型和挤出材料 - 第1部分:指定系统和规格

[中文适用范围]： 本文件为聚甲基丙烯酸甲酯（PMMA）热塑性塑料建立一个命名系统，可作为规范的基础。PMMA塑料的类型通过基于适当水平的设计特性进行分类：a) 维卡软化温度；b) 熔体质量流动速率；c) 黏度数（可选）；以及有关预期用途和/或加工方法、重要性能、添加剂和着色剂的信息。本文件适用于所有聚甲基丙烯酸甲酯均聚物，以及甲基丙烯酸甲酯（MMA）共聚物，其中MMA的质量百分比至少为80%，且其他单体的质量百分比不超过20%。本文件适用于以珠状、颗粒状和颗粒形式用于正常用途的材料，以及未改性或添加了着色剂等的材料。本文件不适用于用弹性体改性的PMMA。具有相同标识的材料不一定具有相同的性能。本文件不提供工程数据、性能数据或加工条件数据，这些数据可能是为特定应用和/或加工方法指定材料时所需的数据。如果需要此类附加属性，则应使用ISO 24026-2中规定的测试方法进行测定。为了为特定应用或确保可重复的加工指定一种热塑性材料，可以在第5数据块（见4.1）中提供其他要求。 [外文原描述]： This document establishes a system of designation for poly(methyl methacrylate) (PMMA) thermoplastic material, which can be used as the basis for specifications. The types of PMMA plastic are differentiated from each other by a classification system based on appropriate levels of the designatory properties: a) Vicat softening temperature; b) melt mass-flow rate; c) viscosity number (optional); and on information about the intended application and/or method of processing, important properties, additives and colorants. This document is applicable to all poly(methyl methacrylate) homopolymers and to copolymers of methyl methacrylate (MMA) containing at least a mass percentage of 80 % of MMA and not more than a mass percentage of 20 % of acrylic esters or other monomers. This document applies to materials ready for normal use in the form of beads, granules and pellets and to materials unmodified or modified by colorants, additives, etc. It does not apply to PMMA modified with elastomers. It is not intended to imply that materials having the same designation give necessarily the same performance. This document does not provide engineering data, performance data or data on processing conditions which might be required to specify a material for a particular application and/or method of processing. If such additional properties are required, they are, if suitable, determined using the test methods specified in ISO 24026-2. In order to specify a thermoplastic material for a particular application or to ensure reproducible processing, additional requirements can be given in data block 5 (see 4.1).