ASTM-D1693 Standard Test Method for Environmental Stress-Cracking of Ethylene Plastics

ASTM-D1693 - 2021 EDITION - CURRENT
Show Complete Document History

Document Center Inc. is an authorized dealer of ASTM standards.
The following bibliographic material is provided to assist you with your purchasing decision:

Standard Test Method for Environmental Stress-Cracking of Ethylene Plastics
ORDER

Price:

$69.00        


Want this as a site license?

Scope

1.1 This test method covers the determination of the susceptibility of ethylene plastics, as defined in Terminology D883, to environmental stress-cracking when subjected to the conditions herein specified. Under certain conditions of stress and in the presence of environments such as soaps, wetting agents, oils, or detergents, ethylene plastics may exhibit mechanical failure by cracking.

1.2 The values stated in SI units are to be regarded as standard.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

Note 1: There is no known ISO equivalent to this standard.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Significance and Use

5.1 This test method may be used for routine inspection purposes by subjecting a required number of specimens to the test conditions for a specified time and noting the number that fail. The cracking obtained with the test reagent is indicative of what may be expected from a wide variety of surface-active agents, soaps, and organic substances that are not absorbed appreciably by the polymer.

5.2 Environmental stress-cracking is a property that is highly dependent upon the nature and level of the stresses applied and on the thermal history of the specimen (1). Under the conditions of the test method, high local multiaxial stresses are developed through the introduction of a controlled imperfection (2, 3). Environmental stress-cracking has been found to occur most readily under such conditions.

Note 2: Different types of polyethylene plastics as defined in Specification D1248 are generally tested under different levels of strain and stress. When it is expressly desired to compare the types at equal levels of strain, the specimens for all types should be tested under Condition B, Table 1 (4) .

(A) Dimensional values are not exactly equivalent. However, for referee purposes the metric units shall apply.
(B) For referee purposes, concentration of Igepal will be consistent with the appropriate material standard. If no concentration is given, then 10 % volume solution shall be used.
(C) At a temperature of 100°C, a full-strength reagent, rather than an aqueous solution of a reagent, is generally used because solutions tend to change their compositions by water evaporation losses during the period of test.

5.3 Information from this test method is not intended to be used for direct application to engineering problems.

Note 3: Caution should be used in comparing and ranking various ethylene plastics into distinct and separate groups by this test method (see Section 13 and Note 12).
As thermal history is recognized as an important variable, test results by this test method employing laboratory molded samples cannot necessarily be expected to show agreement with test results from samples obtained by other means. The true performance potential of a given ethylene plastic may, however, best be determined with specimens obtained from commercially prepared items (5).

Keywords

environmental resistance; polyethylene; stress-cracking;

To find similar documents by ASTM Volume:

08.01 (Plastics (I): D256 - D3159)

To find similar documents by classification:

83.080.20 (Thermoplastic materials)

This document comes with our free Notification Service, good for the life of the document.

This document is available in either Paper or PDF format.

 

Customers who bought this document also bought:

IPC-A-610
Acceptability of Electronic Assemblies (Hardcopy format)

IPC-A-600
Acceptability of Printed Boards

IPC/EIA-J-STD-001
Requirements for Soldered Electrical and Electronic Assemblies

Document Number

ASTM-D1693-21

Revision Level

2021 EDITION

Status

Current

Modification Type

Revision

Publication Date

Oct. 1, 2021

Document Type

Test Method

Page Count

11 pages

Committee Number

D20.15