ASTM D1171-2016 Standard Test Method for Rubber Deterioration&x2014 Surface Ozone Cracking Outdoors (Triangular Specimens)《橡胶劣化的标准试验方法 在地表臭氧龟裂的室外环境下 (三角形试样)》.pdf
《ASTM D1171-2016 Standard Test Method for Rubber Deterioration&x2014 Surface Ozone Cracking Outdoors (Triangular Specimens)《橡胶劣化的标准试验方法 在地表臭氧龟裂的室外环境下 (三角形试样)》.pdf》由会员分享,可在线阅读,更多相关《ASTM D1171-2016 Standard Test Method for Rubber Deterioration&x2014 Surface Ozone Cracking Outdoors (Triangular Specimens)《橡胶劣化的标准试验方法 在地表臭氧龟裂的室外环境下 (三角形试样)》.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D1171 15D1171 16Standard Test Method forRubber DeteriorationSurface Ozone Cracking Outdoors orChamber (Triangular Specimens)1This standard is issued under the fixed designation D1171; the number immediately following the designation indicates the year oforiginal adoption or, in the case
2、 of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S. Department of Defense.1. Scope1.1 This t
3、est method permits the estimation of the relative ability of rubber compounds used for applications requiring resistanceto outdoor weathering.1.2 This test method is not applicable to materials ordinarily classed as hard rubber, but is adaptable to molded or extruded softrubber materials and sponge
4、rubber for use in window weatherstripping as well as similar automotive applications.1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices an
5、d determine the applicability of regulatorylimitations prior to use. For a specific hazard statement, see Note 1 and 8.1.NOTE 1WarningOzone is a hazardous chemical.2. Referenced Documents2.1 ASTM Standards:2D518 Test Method for Rubber DeteriorationSurface Cracking (Withdrawn 2007)3NOTE 1The procedur
6、es in Test Method D518 have been incorporated as Procedures B1, B2, and B3 in Test Methods D1149.D1149 Test Methods for Rubber DeteriorationCracking in an Ozone Controlled EnvironmentD4575 Test Methods for Rubber DeteriorationReference and Alternative Method(s) for Determining Ozone Level inLaborato
7、ry Test Chambers3. Summary of Test Method3.1 Procedures are given for preparing triangular cross-section specimens, for mounting them in strained condition aroundspecified circular mandrels, and for rating the effect of exposure as evidenced by the appearance of surface cracks. The type, time,temper
8、ature, and other conditions of exposure are not given but shall be agreed upon by the purchaser and the seller and shall becompletely described in the test reports.3.2 Two techniques are described, the exposure rating and the quality-retention rating.4. Significance and Use4.1 Molded or extruded rub
9、ber products must withstand the effects of ozone cracking and outdoor weathering for satisfactoryuse. This test enables a simple comparison of performance to be made under specified test conditions in an outdoor test. No directcorrelation between test performance and service performance can be claim
10、ed due to the wide range of service conditions.5. Apparatus5.1 Mounting MandrelAwood mandrel 50 mm (2 in.) in outside diameter, suitably coated with spar varnish or a clear lacquer.The mandrel may be supported by any convenient method.1 This test method is under the jurisdiction of ASTM Committee D1
11、1 on Rubber and is the direct responsibility of Subcommittee D11.15 on Degradation Tests.Current edition approved July 1, 2015Jan. 1, 2016. Published September 2015January 2016. Originally approved in 1951. Last previous edition approved in 20072015as D1171 99 (2007).D1171 15. DOI: 10.1520/D1171-15.
12、10.1520/D1171-16.2 For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.3 The last approved version of this historic
13、al standard is referenced on www.astm.org.This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, AS
14、TM recommends that users consult prior editions as appropriate. In all cases only the current versionof the standard as published by ASTM is to be considered the official document.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States15.2 Fa
15、stening WireEnameled copper wire.6. Test Specimen6.1 The triangular cross-section test specimen shall be a molded, extruded, or sponge section with a continuous skin or surfacelayer, 250 mm (10 in.) long, and cured in a straight position. The cross-sectional dimensions shall be as shown in Fig. 1. D
16、uplicatespecimens shall be tested.6.2 It is recommended that the manufacturer observe a minimum rest period of 24 h between compound mixing and compoundpreparation, and a minimum rest period of 12 h between compound preparation and curing when preparing specimens. The finishof the specimens shall be
17、 as smooth as possible.METHOD AEXPOSURE RATING7. Procedure7.1 Mounting of SpecimensPlace bench marks on each specimen with a crayon, 190 mm (7.5 in.) apart and 32 mm (1.25 in.)from the ends. Form the specimens into a loop by placing the 19-mm (0.75-in.) sides together and tying securely with wire at
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