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 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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