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.
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Sisällysluettelo
Foreword
1 Scope
2 Normative references
3 Principle
4 Apparatus
5 Conditioning and test conditions
5.1 Conditioning
5.2 Test temperature
5.3 Test medium
6 Test stress
6.1 Maximum permissible stress
6.2 Method A
6.3 Method B
6.4 Method C
7 Test specimens
7.1 General
7.2 Shape and dimensions
7.3 Number
7.4 Preparation
8 Procedure
9 Expression of results
9.1 Method A
9.2 Method B
9.3 Method C
10 Precision
11 Test report
Annex A Examples of stresses to be applied (informative)
ISO 22088-1:2006 Plastics -- Determination of resistance to environmental stress cracking (ESC) -- Part 1: General guidance
ISO 2818:1994 Plastics -- Preparation of test specimens by machining
ISO 293:2004 Plastics -- Compression moulding of test specimens of thermoplastic materials
ISO 22088-1:2006 Plastics -- Determination of resistance to environmental stress cracking (ESC) -- Part 1: General guidance
ISO 2818:1994 Plastics -- Preparation of test specimens by machining
ISO 293:2004 Plastics -- Compression moulding of test specimens of thermoplastic materials
ISO 294-1:1996 Plastics -- Injection moulding of test specimens of thermoplastic materials -- Part 1: General principles, and moulding of multipurpose and bar test specimens
ISO 3167:2002 Plastics -- Multipurpose test specimens
ISO 527-2:1993 Plastics -- Determination of tensile properties -- Part 2: Test conditions for moulding and extrusion plastics