ISO 11403-3:2021 Plastics — Acquisition and presentation of comparable multipoint data —Part 3: Environmental influences on properties

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Plastics — Acquisition and presentation of comparable multipoint data —Part 3: Environmental influences on properties由国际标准化组织于2021-06发布，适用于世界范围。

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Plastics — Acquisition and presentation of comparable multipoint data —

Part 3: Environmental influences on properties

1 Scope

This document specifies test procedures for the acquisition and presentation of multipoint data which demonstrate the behaviour of plastics under the following environments:

— prolonged exposure to heat;

— liquid chemicals;

— environmental stress cracking under a constant tensile stress;

— artificial weathering.

The tests are listed in order of increasing severity of the environment. By testing under the least severe environments first, it is possible to make informed judgements regarding whether tests under more severe conditions are worthwhile.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

ISO 175, Plastics — Methods of test for the determination of the effects of immersion in liquid chemicals

ISO 293, Plastics — Compression moulding of test specimens of thermoplastic materials

ISO 294-1, Plastics — Injection moulding of test specimens of thermoplastic materials — Part 1: General principles, and moulding of multipurpose and bar test specimens

ISO 294-2, Plastics — Injection moulding of test specimens of thermoplastic materials — Part 2: Small tensile bars

ISO 295, Plastics — Compression moulding of test specimens of thermosetting materials

ISO 1268 (all parts), Fibre-reinforced plastics — Methods of producing test plates

ISO 1817, Rubber, vulcanized or thermoplastic — Determination of the effect of liquids

ISO 2578, Plastics — Determination of time-temperature limits after prolonged exposure to heat

ISO 4892-2:2013, Plastics — Methods of exposure to laboratory light sources — Part 2: Xenon-arc lamps

ISO 10724-1, Plastics — Injection moulding of test specimens of thermosetting powder moulding compounds (PMCs) — Part 1: General principles and moulding of multipurpose test specimens

ISO 10724-2, Plastics — Injection moulding of test specimens of thermosetting powder moulding compounds (PMCs) — Part 2: Small plates

ISO 20753, Plastics — Test specimens

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https:// www .iso .org/ obp

— IEC Electropedia: available at http:// www .electropedia .org/ 3.1

multipoint data

data characterizing the behaviour of a plastics material by means of a number of test results for a property measured over a range of test conditions

3.2

indicative property

property that has been selected to reveal the influence of an environment on a material through a comparison of measurements of the property before and after exposure

3.3

indicative data

ratios of mean values of indicative properties after and before exposure

Note 1 to entry: They give a measure of the severity of the influence of an environment on a material for specific exposure conditions (see A.2).

3.4

tensile work to break

W

tB

area under a plot of the applied stress against the grip displacement in a tensile test, the applied stress being determined from the ratio of the tensile force to the minimum initial cross-sectional area of the specimen

2

Note 1 to entry: It is expressed in kilojoules per square metre (kJ/m ).

4 Specimen preparation

In the preparation of specimens by injection or compression moulding, the procedures described in ISO 293, ISO 294-1, ISO 294-2, ISO 295, ISO 10724-1, ISO 10724-2 or ISO 1268 (all parts) shall be used. The method of moulding and the conditions depend on the material being moulded. If these conditions are specified in the International Standard appropriate to the material, then they shall be adopted, where possible, for the preparation of every specimen on which data are obtained using this document. For those plastics for which moulding conditions have not yet been standardized, the conditions employed shall be within the range recommended by the polymer manufacturer and shall, for each of the processing methods, be the same for every specimen. Where moulding conditions are not stipulated in any International Standard, the values used for the parameters in Table 1 shall be recorded with the data for that material.

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