ASTM D1917-2003(2007) Standard Test Methods for Rubber Property&x2014 Shrinkage of Raw and Compounded Hot-Polymerized Styrene-Butadiene Rubber (SBR)《橡胶性能的标准试验方法 热聚合丁苯橡胶生胶和复合橡胶的收缩性》.pdf

《ASTM D1917-2003(2007) Standard Test Methods for Rubber Property&x2014 Shrinkage of Raw and Compounded Hot-Polymerized Styrene-Butadiene Rubber (SBR)《橡胶性能的标准试验方法 热聚合丁苯橡胶生胶和复合橡胶的收缩性》.pdf》由会员分享，可在线阅读，更多相关《ASTM D1917-2003(2007) Standard Test Methods for Rubber Property&x2014 Shrinkage of Raw and Compounded Hot-Polymerized Styrene-Butadiene Rubber (SBR)《橡胶性能的标准试验方法 热聚合丁苯橡胶生胶和复合橡胶的收缩性》.pdf（4页珍藏版）》请在麦多课文档分享上搜索。

1、Designation: D 1917 03 (Reapproved 2007)Standard Test Methods forRubber PropertyShrinkage of Raw and Compounded Hot-Polymerized Styrene-Butadiene Rubber (SBR)1This standard is issued under the fixed designation D 1917; the number immediately following the designation indicates the year oforiginal ad

2、option or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the Department of Defense.

3、1. Scope1.1 These test methods cover the determination of millshrinkage of hot-polymerized styrene-butadiene rubbers (SBR)and their compounds.1.2 The values stated in SI units are to be regarded as thestandard. The values in parentheses are for information only.1.3 This standard does not purport to

4、address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2D 3182 Pra

5、ctice for RubberMaterials, Equipment, andProcedures for Mixing Standard Compounds and Prepar-ing Standard Vulcanized SheetsD 3896 Practice for Rubber From Synthetic SourcesSamplingD 4483 Practice for Evaluating Precision for Test MethodStandards in the Rubber and Carbon Black ManufacturingIndustries

6、E 145 Specification for Gravity-Convection and Forced-Ventilation Ovens3. Summary of Test Methods3.1 A specimen of raw or compounded rubber is preparedon a standard laboratory mill, its dimensions are measured orcontrolled by a cutting technique, it is heat aged in a circulatingoven at 100C, cooled

7、at room temperature, and the dimen-sions are again measured. The linear percent shrinkage of thespecimen is calculated.3.2 The following test methods are given:3.2.1 Test Method AFor raw SBR which is particularlyapplicable to rubbers having shrinkage below 25 %, such ascross-linked types.3.2.2 Test

8、Method BFor compounded SBR.4. Significance and Use4.1 The shrinkage of SBR rubbers and their compoundsafter processing is of importance in many applications. Thisproperty can also be used for control, specifications, andfabrication purposes.5. Apparatus5.1 MillA standard laboratory mill as described

9、 in Prac-tice D 3182.5.2 Laboratory Oven, having internal horizontal dimensionsin excess of 300 by 480 mm (12 by 19 in.) and conforming tothe requirements for Type II, Grade B ovens given in Specifi-cation E 145.5.3 Mill Knife.5.4 Cutting Tools:5.4.1 A tool having two parallel blades spaced about 20

10、 mm(0.8 in.) apart. Two standard mill knives bolted together,properly spaced, may be used.5.4.2 A150 mm long by 100 mm wide (6.0 by 4.0 in.) metaltemplate approximately 1 mm (0.04 in.) thick, equipped with ahandle, and having its longitudinal dimension curved to fit thecontour of the mill roll, may

11、also be used. It is especiallysuitable for raw rubbers that are disjunctive or form a poorsheet. A mill knife is used for cutting the rubber.5.5 Smooth Sheet, of TFE-fluorocarbon, metal, or glass,having dimensions to accommodate the specimen.5.6 Linear Scale, 500 mm (20 in.) long, graduated in 1.0mm

12、 (0.05 in.).5.7 Dusting powder, for example talc or soapstone.1These test methods are under the jurisdiction of ASTM Committee D11 onRubber and are the direct responsibility of Subcommittee D11.12 on ProcessabilityTests.Current edition approved Nov. 1, 2007. Published January 2008. Originallyapprove

13、d in 1962. Last previous edition approved in 2003 as D 1917 03.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM websit

14、e.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. Sampling6.1 Take samples in accordance with Practice D 3896.NOTE 1Make sure the sample is talc-free.7. Test Specimens7.1 Standard SpecimensThe standard specimen is a stripcut with

15、a double-bladed knife. Three specimens are cut, one inthe center, and two, each halfway between the center and theedge of the banded material.7.2 Template SpecimensAn alternative method is the useof a template. When the template is used, only one specimen iscut exactly around the edges of the templa

16、te from the center ofthe material banded on the mill.NOTE 2These two types of specimens will not necessarily giveidentical results. Results obtained on one type of specimen should not becompared with those obtained using the other.TEST METHOD ARAW RUBBER8. Procedure8.1 With the mill rolls maintained

17、 at 50 6 5C (122 6 9F)and roll separation of 0.20 6 0.05 mm (0.008 6 0.002 in.),pass 200 g of rubber twice without banding.8.2 Adjust the roll separation to 0.6 6 0.1 mm (0.024 60.004 in.), band the rubber on the slow (front) roll, and millexactly 10 min. Make three-quarter cuts from alternate sides

18、every12 min throughout the milling.8.3 Open the mill rolls slowly and evenly until the bankdisappears and the rubber receives no pressure from theopposite roll. This is done by opening the rolls in increments ofno more than 0.25 mm (0.01 in.) on alternate ends of the millrolls.8.4 Within 15 s after

19、the mill rolls are opened, trim the band(if necessary) by cutting off no more than 15 mm (0.6 in.) fromeach of the outside edges (see Note 3).8.5 Cut three standard specimens, one from the center andone halfway between the center and each edge. Make the cutswhile the mill is running by holding the c

20、utting tool (see 5.4.1)firmly against the roll at the indicated locations for the durationof one revolution.8.6 Stop the mill and make a cut straight across the bandedrubber. Start the mill and remove the specimens, taking carenot to stretch or otherwise distort them. Place the threespecimens on a s

21、mooth, well-dusted metal, glass, or TFE-fluorocarbon sheet, with the inside or smooth surface down(see Note 4).NOTE 3Steps 8.4-8.6 should take no more than 2 min.8.7 If the template specimen is used, stop the mill after theprocedure in 8.4, place the template (see 5.4.2) in the middle ofthe banded r

22、ubber and cut one specimen as fast as possible,making sure that the cuts are made exactly along the edges.Remove the specimen, place it on a smooth well-dusted surfacewith the inside or smooth surface down, and mark thelongitudinal direction.NOTE 4Steps 8.4 and 8.7 should take no more than 2 min.NOT

23、E 5The dusted surface is used to prevent any adhesion orsticking.8.8 Place the sheet holding the specimens in the ovencontrolled at 100 6 2C (212 6 3.8F) for 1 h.8.9 Remove the sheet with the specimens from the oven andwithout removing the specimens, allow them to cool at 23 62C (73.4 6 3.6F) for 1

24、h.8.10 Measure the length of each of three standard specimensto the nearest 1 mm (0.05 in.). Measure the shrunken length ofthe template specimen on three places. Record all three values.8.11 Calculate the percentage of shrinkage using the equa-tion shown in 10.1.TEST METHOD BCOMPOUNDED RUBBER9. Proc

25、edure9.1 With the mill rolls maintained at 50 6 5C (122 6 9F)and roll separation of 0.20 6 0.05 mm (0.008 6 0.002 in.) passtwice without banding 300 g of the compound that had at least1-h rest period after mixing.9.2 Adjust the roll separation to 1.30 6 0.15 mm (0.050 60.006 in.), band the compound

26、on the fast (back) roll, and millfor 4 min, making three-quarter cuts from alternate sides every12 min. The fast roll is used at this point to improve the bandingof tacky or baggy compounds.9.3 Continue milling of the compound on the fast roll for 1min without cutting.9.4 Open the mill rolls slowly

27、and evenly until the bankdisappears and the compound receives no pressure from theopposite roll. Increase the opening by adjusting in incrementsof no more than 0.25 mm (0.01 in.) on alternate ends of the millroll.9.5 Within 15 s after the mill rolls are opened, trim the bandby cutting off no more th

28、an 15 mm (0.6 in.) from each of theoutside edges (see Note 6).9.6 Cut three standard specimens about 20 mm (0.8 in.) inwidth, one from the center and one halfway between the centerand each edge. Make the cuts while the mill is running byholding the cutting tool firmly against the roll at the indicat

29、edlocations for the duration of one revolution.9.7 Stop the mill and make a cut straight across the bandedcompound. Start the mill and remove the specimens, takingcare not to stretch or otherwise distort them. Place the threespecimens on a smooth, well-dusted metal, glass, or TFE-fluorocarbon surfac

30、e with the inside or smooth surface down.NOTE 6Steps 9.5, 9.6, and 9.7 should take no more than 2 min.NOTE 7Dusted surface is used to prevent any adhesion or sticking.9.8 If the template specimen is used, stop the mill after 9.5,place the template in the middle of the banded compound andcut the spec

31、imen as fast as possible, making sure that the cutsare made exactly along the edges. Remove the specimen, placeit on a smooth well-dusted metal, glass, or TFE-fluorocarbonsurface, with the inside or smooth surface down, and mark thelongitudinal direction (see Note 8).NOTE 8Steps 9.5 and 9.8 should t

32、ake no more than 2 min.9.9 Place the sheet with the specimens in the oven con-trolled at 100 6 2C (212 6 3.8F) for 1 h.9.10 Remove the sheet with the specimens from the ovenand without removing the specimens allow them to cool at 236 2C (73.4 6 3.6F) for 1 h.D 1917 03 (2007)29.11 Measure the length

33、of each standard specimen to thenearest 1 mm (0.05 in.). Measure the shrunken length of thetemplate specimen on three places. Record all three values.9.12 Calculate the percentage of shrinkage using the equa-tion shown in 10.1.10. Calculation10.1 Calculate the percentage of shrinkage, S, as follows:

34、S 5 L02 L!/L0# 3 100 (1)where:L0= original length of the standard specimen which isequal to the circumference of the mill roll (see Note9), andL = shrunken length or the average value of three lengthmeasurements after oven aging and cooling.NOTE 9The circumference of a standard mill is between 471.2

35、 and486.9 mm (18.54 and 19.16 in.). The average value of 479.0 mm (18.85in.) may be used except in referee or precision testing, when the actualcircumference should be determined. If the template is used, the originallength shall be 150 mm.11. Report11.1 Report the following information:11.1.1 Sampl

36、e identification,11.1.2 Method used,11.1.3 Type of specimen used,11.1.4 Aging conditions,11.1.5 Average value of three measurements, and11.1.6 Date of test.PRECISION AND BIAS12. Precision and Bias12.1 This precision and bias section has been prepared inaccordance with Practice D 4483. Please refer t

37、o this practicefor terminology and other statistical calculation details.12.2 The precision results in this precision and bias sectiongive an estimate of the precision of this test method with thematerials (rubbers, etc.) used in the particular interlaboratoryprogram as described below. The precisio

38、n parameters shouldnot be used for acceptance or rejection testing of any group ofmaterials without documentation that the parameters are appli-cable to the particular group of materials and the specifictesting protocols of the test method.12.3 A Type 1 interlaboratory test program (ITP) wasconducte

39、d in 1995. Three materials (polymers) with differentlevels of shrinkage were supplied to four laboratories; in eachlaboratory two replicate tests were conducted on each of twosuccessive test days. A test result is defined as a singlemeasurement of percent shrinkage using Method A.12.4 The precision

40、results are given in Table 1; see notes atthe bottom of the table. Precision may be expressed in theformat of the following statements that use an “appropriatevalue” of r and R or (r) and (R) associated with a mean levelor material in the table closest to the mean level underconsideration for any ma

41、terial in routine testing operations.12.5 For two of the materials the within-laboratory and thebetween-laboratory standard deviations are equal. This occursmainly because the within-laboratory variation is large and the“average of two” between-laboratory values have decreasedvariation. This situati

42、on frequently occurs in ITP that have onlya minimal number of laboratories.12.6 RepeatabilityThe repeatability, r (in percent actualshrinkage) of this test method has been established as theappropriate value tabulated in Table 1. Two single test results,obtained under normal test method procedures,

43、that differ bymore than this tabulated r (for any given level) must beconsidered as derived from different or non-identical samplepopulations.12.7 ReproducibilityThe reproducibility, R (in percentactual shrinkage) of this test method has been established as theappropriate value tabulated in Table 1.

44、 Two single test resultsobtained in two different laboratories, under normal testmethod procedures, that differ by more than the tabulated R(for any given level) must be considered to have come fromdifferent or non-identical sample populations.12.8 Relative PrecisionThe relative repeatability (r) an

45、dthe relative reproducibility (R) are defined for this standard asa percent of the measured percent shrinkage. These values arealso found in Table 1.12.9 BiasIn test method terminology, bias is the differ-ence between an average test value and the reference (or true)test property value. Reference va

46、lues do not exist for this testmethod since the value (of the test property) is exclusivelydefined by the test method. Bias cannot therefore be deter-mined.13. Keywords13.1 compounded rubber; hot-polymerized SBR; millshrinkage; raw rubberTABLE 1 Precision for Percent Shrinkage: Method AWithin Lab Be

47、tween LabMaterial Mean Sr r (r) SR R (R)B 10.4 0.654 1.83 17.6 0.654 1.83 17.6A 14.4 0.742 2.08 14.4 0.808 2.26 15.7C 25.5 1.755 4.91 19.3 1.755 4.91 19.3Note: Only four laboratories participated in the ITPSr = repeatability standard deviationSR = reproducibility standard deviationr = repeatability,

48、 in measurement unitsR = reproducibility, in measurement units(r) = repeatability (relative) in percent(R) = reproducibility (relative) in percentD 1917 03 (2007)3ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this s

49、tandard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infringement 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 for additional standardsand should be addressed to ASTM International Headquarters. Your comments will rece