ISO 180:2019 塑料 伊佐德式冲击强度的测定

标准编号：ISO 180:2019

中文名称：塑料 伊佐德式冲击强度的测定

英文名称：Plastics — Determination of Izod impact strength

发布日期：2019-11

标准范围

1.1本文件规定了在规定条件下测定塑料悬臂梁冲击强度的方法。定义了许多不同类型的样本和测试配置。根据材料类型、试件类型和缺口类型规定不同的试验参数。1.2该方法用于研究特定类型试样在规定的冲击条件下的行为，并用于在试验条件固有的限制范围内估计试样的脆性或韧性。1.3该方法适用于以下范围的材料:-刚性热塑性模制和挤出材料，除了未填充类型之外，还包括填充和增强化合物；刚性热塑性塑料片材；-刚性热固性模制材料，包括填充和增强化合物；刚性热固性片材，包括层压板；-纤维增强的热固性和热塑性复合材料，其包含单向或非单向增强物，例如垫、机织物、机织粗纱、短切线、组合和混合增强物、粗纱和碾磨纤维以及由预浸渍材料(预浸料)制成的片材；-热致液晶聚合物。1.4该方法通常不适用于刚性多孔材料和含有多孔材料的夹层结构。缺口试样通常也不用于长纤维增强复合材料或热致液晶聚合物。1.5该方法适用于使用可模制至选定尺寸、从标准多用途试样（见ISO 20753）的中心部分加工或从成品或半成品加工的试样。成品，如模塑件、层压板和挤出或铸造板材。1.6该方法规定了试样的优选尺寸。对不同尺寸或具有不同缺口的试样或在不同条件下制备的试样进行的试验可能产生不具有可比性的结果。其他因素，如设备的能量容量、其冲击速度和样品的调节也会影响结果。因此，当需要比较数据时，应仔细控制和记录这些因素。1.7该方法不打算用作设计计算的数据来源。然而，可以通过在不同温度下测试、通过改变缺口半径和/或厚度以及通过测试在不同条件下制备的样品来获得关于材料的典型行为的信息。

1.1 This document specifies a method for determining the Izod impact strength of plastics under defined conditions. A number of different types of specimen and test configurations are defined. Different test parameters are specified according to the type of material, the type of test specimen and the type of notch.1.2 The method is used to investigate the behaviour of specified types of specimen under the impact conditions defined and for estimating the brittleness or toughness of specimens within the limitations inherent in the test conditions.1.3 The method is suitable for use with the following range of materials:— rigid thermoplastic moulding and extrusion materials, including filled and reinforced compounds in addition to unfilled types; rigid thermoplastics sheets;— rigid thermosetting moulding materials, including filled and reinforced compounds; rigid thermosetting sheets, including laminates;— fibre-reinforced thermosetting and thermoplastic composites incorporating unidirectional or non-unidirectional reinforcements such as mat, woven fabrics, woven rovings, chopped strands, combination and hybrid reinforcements, rovings and milled fibres and sheet made from pre-impregnated materials (prepregs);— thermotropic liquid-crystal polymers.1.4 The method is not normally suitable for use with rigid cellular materials and sandwich structures containing cellular material. Notched specimens are also not normally used for long-fibre-reinforced composites or thermotropic liquid-crystal polymers.1.5 The method is suited to the use of specimens which can be either moulded to the chosen dimensions, machined from the central portion of a standard multipurpose test specimen (see ISO 20753) or machined from finished or semi-finished products such as mouldings, laminates and extruded or cast sheet.1.6 The method specifies preferred dimensions for the test specimen. Tests which are carried out on specimens of different dimensions or with different notches, or specimens which are prepared under different conditions, may produce results which are not comparable. Other factors, such as the energy capacity of the apparatus, its impact velocity and the conditioning of the specimens can also influence the results. Consequently, when comparative data are required, these factors are to be carefully controlled and recorded.1.7 The method is not intended to be used as a source of data for design calculations. Information on the typical behaviour of a material can be obtained, however, by testing at different temperatures, by varying the notch radius and/or the thickness and by testing specimens prepared under different conditions.

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