D865–99橡胶热空气老化试验方法.pdf

Designation: D 865-99
Standard Test Method for
Rubber-deterioration by Heating in Air(Test Tube
Enclosure
Ihis standard is issued under the fixed designation D 865: the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (E)indicates an editorial changc since the last revision or reapproval
I'his standard has been approved for use by agencies of the Departmen of Defense
for known periods of time, after which their physical properties
1. I This test method describes a procedure to determine th
are determined. These are compared with the properties deter
deterioration induced by heating rubber specimens in indi-
mined on the original specimens and the changes noted
vidual test tube enclosures with circulating air. This isolation
3. 2 Unless otherwise specified, the determination of the
prevents cross contamination of compounds due to loss of physical properties shall be
carried out in accordance with Test
le, antioxidants)and
Methods D 412
quent migration into other rubber compounds(specimens). The
3. 3 Except as may be otherwise specified in this test
absorption of such volatile materials may influence the degra
method, the requirements of Practices D 3 182 and D 3183 sh
dation rate of rubber compounds
be complied with and are made part of this test method
12 The values stated in SI units are to be regarded as the
3. 4 In case of conflict between the provisions of this test
standard, The values given in parentheses are for information method and those of detailed specifications or test methods for
a particular material, the latter shall take precedence
1.3 This standard does not purport to address all of the
safely concerns, if any, associated with its use. I[ is the
4. Significance and Use
ibility
4.1 Rubber and rubber products must resist the deterioration
of the user Q/ this standard to establish appro- of physical properties with time caused by oxidative and
ld determine the applic
bility of regulatory limitations prior lo use
thermal aging. With this test method, these characteristics may
be determined in a way that is free of some of the complica-
2. Referenced Documents
tions inherent in community-type aging devices, that is where
2.1 ASTM Standards
numerous compounds (specimens )are aged in the same
D 412 Test Methods for Vulcanized Rubber and Thermo-enclosure
plastic Rubbers and Thermoplastic Elastomers-tension
4.2 The isolation of compound (specimens )by the use of
D 573 Test Method for Rubber-deterioration in an Air individual circulating air test tube enclosures prevents any
cross contamination from volatile products and permits a more
D 1349 Practice for Rubber-standard Temperatures for Representative assessment oi agung perormance
testin
4.3 Please refer to the Annex in Test Met
.thod D 573 for
D 3182 Practice for Rubber-materials, Equipment, and important information on standard compounds used for pre-
Procedures for Mixing Standard Compounds and Prepar- sion testing for accelerated test aging evaluation
ing Standard Vulcanized Sheets
5.A
D 3183 Practice for Rubber-preparation