1、Designation: D8043 16Standard Guide forCarbon BlackShelf Life1This standard is issued under the fixed designation D8043; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates t
2、he year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This guide defines the shelf life of carbon black.2. Referenced Documents2.1 ASTM Standards:D1509 Test Methods for Carbon BlackHeating LossD1510 Test Method for Carbon
3、BlackIodine AdsorptionNumberD4821 Guide for Carbon BlackValidation of Test MethodPrecision and BiasD6915 Practice for Carbon BlackEvaluation of StandardReference Blacks3. Significance and Use3.1 This guide defines the shelf life of carbon black whenstored under proper conditions.4. Carbon Black Shel
4、f Life4.1 In accordance with Practice D6915, the shelf life ofStandard Reference Blacks (SRBs) is defined as indefinitewhen stored in a manner that protects it from liquid water orhigh humidity environments. The only two properties ofcarbon black known to change over time are moisture (TestMethods D
5、1509) and Iodine Number (Test Method D1510).The moisture content can change over the short-term (weeks ormonths), depending on the ambient humidity and the surfacearea of the carbon black, see 4.4. Iodine Number can changeover an extended period (years) due to a slow increase in theoxygen content on
6、 the surface of the carbon black. Thisphenomenon is primarily observed with tread grades (N100 N300 series) and other high surface area carbon blacks, andmanifests itself by a slowly decreasing Iodine Number, al-though the actual surface area of the carbon black remainsunchanged. For more details ab
7、out the aging effect on iodinenumber, see subsection 5.1.1 of Guide D4821.4.2 The same reasoning for the shelf life of SRBs extends tocommercial carbon black. It should be noted that the slightchange in Iodine Number over an extended period does notaffect actual surface area properties and in-rubber
8、 performanceof the carbon black.4.3 The in-rubber properties of a wide range of carbon blackgrades have shown no significant change over a 4 year period,see Table 1 and Table 2. This is an on-going study and will beupdated as future data is collected.4.4 In cases where the carbon black moisture leve
9、l hasincreased over time, heating the carbon black at 125C for anadequate amount of time will remove the moisture and renderthe material fit for use.4.5 Based on studies by ASTM Committee D24, the shelflife of carbon black is indefinite.5. Keywords5.1 carbon black; shelf life1This guide is under the
10、 jurisdiction of ASTM Committee D24 on Carbon Blackand is the direct responsibility of Subcommittee D24.67 on Sustainability.Current edition approved June 1, 2016. Published June 2016. DOI: 10.1520/D8043-16.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428
11、-2959. United States1ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringemen
12、t of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard or f
13、or additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views know
14、n to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM
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16、 http:/ 1 In-Rubber Properties of Tread Grade Carbon Blacks Over a 4 Year PeriodASTM D3192 (NR) N115 N234 N330Absolute IRB-8Diff inIRBAbsolute IRB-8Diff inIRBAbsolute IRB-8Diff inIRBUnit 2011 2015 2011 2015 values 2011 2015 2011 2015 values 2011 2015 2011 2015 valuesViscosity ML 1 + 4 83 79 9 11 2 8
17、4 81 12 13 1 72 68 2 0 2.0Cure Data min dNm 3.8 3.6 0.6 0.9 0.3 3.7 3.4 0.6 0.7 0.1 2.9 2.7 0.3 0.0 0.3max dNm 18.8 19.2 0.3 1.3 1.0 20.2 20.4 1.7 2.5 0.8 19.1 18.3 0.4 0.4 0.0max-min dNm 15.0 15.6 0.3 0.4 0.7 16.5 17.0 1.0 1.7 0.7 16.3 15.6 0.7 0.4 0.3t10% min 3.2 3.4 0.4 0.6 0.2 2.6 2.5 0.3 0.2 0.
18、1 2.7 3.0 0.2 0.2 0.4t90% min 34.9 30.5 1.6 4.7 3.1 29.5 23.9 4.2 1.8 2.4 31.0 24.7 2.8 1.1 1.7Mooneyscorcht5 min 16.2 16.7 2.8 4.2 1.4 11.5 11.5 2.1 1.1 1.0 13.9 13.4 0.5 0.9 0.4t35 min 21.4 21.1 4.0 5.0 1.0 14.9 14.5 2.8 1.6 1.2 17.6 17.0 0.3 0.9 0.6Stress-strainM300% MPa 9.2 10.3 3.6 3.4 0.2 12.9
19、 14.0 0.2 0.4 0.6 12.9 13.4 0.2 0.2 0.4EaB % 560 560 85 95 10 470 450 15 15 0 470 500 0 35 35Tensile MPa 20.1 21.6 0.5 0.5 1.0 21.0 20.9 0.9 0.2 0.7 20.6 22.1 0.3 1.0 0.7Shore A 64 67 1.5 0.5 2.0 68 70 2 4 2 66 66 0 0 0.0Dispersion no. of peaks 67 24 26 12 14 68 23 43 11 32 51 13 1 1 0peak area % 2.
20、8 0.8 1.1 0.6 0.5 2.4 0.6 1.6 0.4 1.2 2.4 0.4 0.2 0.2 0.0RPA tan d 60C 0.25 0.27 0.04 0.05 0.01 0.23 0.25 0.02 0.03 0.01 0.19 0.22 0.01 0.00 0.01G* MPa 1.71 1.70 0.03 0.09 0.06 1.96 1.94 0.29 0.33 0.04 1.76 1.68 0.04 0.07 0.03US units M300% psi 1081 1210 423 394 29 1515 1645 23 41 64 1515 1574 23 29
21、 52rel. to IRB-8 % 526 526 80 89 9 442 423 14 14 0 442 470 0 33 33Tensile psi 2799 3008 70 70 140 2924 2910 125 28 97 2868 3077 42 139 97TABLE 2 In-Rubber Properties of Carcass Grade Carbon Blacks Over a 4 Year PeriodASTM D3192 (NR) N550 N660Absolute IRB-8 Diff in IRB Absolute IRB-8 Diff in IRBUnit
22、2011 2015 2011 2015 values 2011 2015 2011 2015 valuesViscosity ML 1 + 4 68 60 6 8 2 61 54 14 14 0Cure Data min dNm 2.5 2.0 0.7 0.7 0.0 2.2 1.8 0.9 0.9 0.0max dNm 17.1 17.1 1.3 0.9 0.4 15.3 14.7 3.4 3.2 0.2max-mindNm 14.6 15.0 0.5 0.2 0.3 13.2 12.9 2.5 2.3 0.2t10% min 3.1 3.1 0.2 0.3 0.1 4.0 3.8 1.3
23、1.1 0.2t90% min 29.0 21.6 4.4 4.2 0.2 33.3 24.1 1.2 1.7 2.9Mooneyscorcht5 min 13.8 13.3 0.6 0.8 0.2 21.0 18.4 7.4 5.9 1.5t35 min 17.7 17.3 0.5 1.2 0.7 26.8 24.0 9.2 7.9 1.3Stress-strainM300% MPa 12.9 13.6 0.2 0.0 0.2 11.5 12 1.1 1.7 0.6EaB % 480 470 10 5 15 480 490 20 25 5Tensile MPa 19.8 20.2 1.6 0
24、.9 0.7 18.6 20.0 1.4 1.1 0.3Shore A 65 67 1 0.5 1.5 61 62 4 5 1Dispersionno. ofpeaks 4 4 40 8 32 12 6 12 18 30peak area % 0.0 0.1 1.6 0.2 1.4 0.4 0.1 0.2 0.6 0.8RPA tan d 60C 0.14 0.16 0.06 0.06 0.00 0.13 0.14 0.08 0.08 0.00G* MPa 1.58 1.47 0.10 0.14 0.04 1.25 1.21 0.43 0.40 0.03US units M300% psi 1515 1598 18 6 12 1351 1410 123 194 71rel. toIRB-8% 451 442 9 5 14 451 461 19 24 5Tensile psi 2757 2813 216 125 91 2590 2785 188 153 35D8043 162
