ISO 22088-2:2006 PDF

Plastics — Determination of resistance to environmental stress cracking (ESC) — Part 2: Constant tensile load method

Название (английский):

ISO 22088-2:2006

Plastics — Determination of resistance to environmental stress cracking (ESC) — Part 2: Constant tensile load method

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 10
Дата публикации:: 10 августа 2006 г.
Издание:: ISO IS 22088 edition 1 version 1
ICS:: 83.080.01

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Описание (английский):

ISO 22088-2:2006 specifies methods for the determination of environmental stress cracking (ESC) of thermoplastics when they are subjected to a constant tensile load in the presence of chemical agents. It is applicable to test specimens prepared by moulding and/or machining and can be used both for the assessment of ESC of plastic materials exposed to different environments, and for the determination of ESC of different plastic materials exposed to a specific environment. This is essentially a ranking test and is not intended to provide data to be used for design or performance prediction. Methods for the determination of environmental stress cracking by means of a constant-strain test are specified in ISO 22088-3, ISO 22088-4 and ISO 22088-5.

Технические детали

Технический комитет: ISO/TC 61/SC 6 - Ageing, chemical and environmental resistance
SKU: ISO 22088-2:2006

Abstract

Overview

ISO 22088-2:2006 - "Plastics - Determination of resistance to environmental stress cracking (ESC) - Part 2: Constant tensile load method" specifies laboratory procedures to assess how thermoplastics resist environmental stress cracking (ESC) when held under a constant tensile load in the presence of chemical agents. The standard is a comparative/ranking test (not intended for design or performance prediction) and applies to specimens prepared by moulding and/or machining.

Key topics and requirements

Test principle: Specimens are immersed or coated with a chemical agent while subjected to a constant tensile load; time and/or stress at rupture are recorded.
Methods:
- Method A: Determine the tensile stress that causes rupture at 100 h (interpolation of time-to-rupture vs stress).
- Method B: Measure time to rupture under a single agreed stress (used when rupture time > 100 h).
- Method C: Determine times to rupture for a series of stresses and evaluate results for agreed stresses (Method A is a subset of C).
Specimens: Prefer ISO 527-2 type 1BA small specimen; preferred thickness (2 ± 0.2) mm (alternatively 3–4 mm or product thickness). Minimise residual stresses in preparation; annealing is recommended.
Number of specimens: Minimum five specimens per stress for Methods A and B; minimum two per stress for Method C.
Loading and measurement: Calculate force F = σA (σ = selected stress, A = cross-sectional area). Measure dimensions to 0.01 mm. Apply load smoothly (preferably 3–5 s,

Overview

Key topics and requirements

Test principle: Specimens are immersed or coated with a chemical agent while subjected to a constant tensile load; time and/or stress at rupture are recorded.
Methods:
- Method A: Determine the tensile stress that causes rupture at 100 h (interpolation of time-to-rupture vs stress).
- Method B: Measure time to rupture under a single agreed stress (used when rupture time > 100 h).
- Method C: Determine times to rupture for a series of stresses and evaluate results for agreed stresses (Method A is a subset of C).
Specimens: Prefer ISO 527-2 type 1BA small specimen; preferred thickness (2 ± 0.2) mm (alternatively 3–4 mm or product thickness). Minimise residual stresses in preparation; annealing is recommended.
Number of specimens: Minimum five specimens per stress for Methods A and B; minimum two per stress for Method C.
Loading and measurement: Calculate force F = σA (σ = selected stress, A = cross-sectional area). Measure dimensions to 0.01 mm. Apply load smoothly (preferably 3–5 s,

ISO 22088-2:2006 PDF

Технические детали

Abstract

Overview

Key topics and requirements

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Abstract

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