BS-5293-20-1992 ISO-3257-1992.pdf
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1、BRITISH STANDARD BS 5293-20: 1992 ISO 3257:1992 Sampling and testing carbon black for use in the rubber industry Part 20: Method for evaluation in styrene-butadiene rubbers UDC 667.621.6:543.813 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:03:31 GMT+00:00 2006, Uncontrolled Copy, (c) BS
2、I BS 5293-20:1992 This British Standard, having been prepared under the direction of the Plastics and Rubber Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 December 1992 BSI 08-1999 The following BSI references relate to the work on t
3、his standard: Committee reference PRM/53 Draft for comment 92/41627 DC ISBN 0 580 21453 2 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Plastics and Rubber Standards Policy Committee (PRM/-) to Technical Committee PRM/53, upon which th
4、e following body was represented: British Rubber Manufacturers Association Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:03:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5293-20:1992 BSI 08-1999i Contents Page Committees respons
5、ibleInside front cover National foreword ii 1Scope1 2Normative references1 3Preparation of test mixes for evaluation of carbon black in styrene-butadiene rubbers1 4Evaluation of vulcanization characteristics by the oscillating disc curemeter test2 5Evaluation of tensile stress-strain properties of v
6、ulcanized test mixes2 6Test report2 Table 1 Standard test formula for evaluation of carbon black in butadiene-styrene rubbers2 List of references Inside back cover Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:03:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5293-20:1992 ii BSI 08-199
7、9 National foreword This Part of BS 5293 has been prepared under the direction of the Plastics and Rubber Standards Policy Committee and is identical with ISO 3257:1992 Rubber compounding ingredients Carbon black Method of evaluation in styrene-butadiene rubbers, published by the International Organ
8、ization for Standardization (ISO). This Part of BS 5293 is a part of a revision of BS 5293:1976 as a multipart standard, parts of which are identical with ISO standards. The first edition of BS 5293 published in 1976 did not include a method to evaluate carbon black in styrene-butadiene rubbers. The
9、 Technical Committee has reviewed the provisions of ISO 37:1977, ISO 289:1985 and ISO 2393:1973, to which normative reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. A related British Standard to ISO 289 is BS 903-A58:1990 Methods usin
10、g the Mooney viscometer. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references
11、 International StandardCorresponding British Standard BS 903 Physical testing of rubber ISO 471:1983Part A35:1985 Temperatures, humidities and times for conditioning and testing of test pieces (Identical) ISO 3417:1991Part A60 Curemetering Section 60.2:1992 Method for the determination of vulcanizat
12、ion characteristics using an oscillating disc curemeter. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 and 2, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated.
13、This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:03:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5293-20:1992 BSI 08-19991 1 Scope This International Standard specifies standard materials, equipment and processing
14、methods for evaluating carbon black in styrene-butadiene rubbers (SBR). NOTE 1Variations in equipment and testing procedure permitted in this International Standard can lead to discrepant results. Therefore, carbon black is preferably compared to a reference carbon black tested under the same condit
15、ions. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based o
16、n this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 37:1977, Rubber, vulcanized Determination of tensile stress-str
17、ain properties. ISO 289:1985, Rubber, unvulcanized Determination of Mooney viscosity. ISO 471:1983, Rubber Standard temperatures, humidities and times for the conditioning and testing of test pieces. ISO 2393:1973, Rubber test mixes Preparation, mixing and vulcanization Equipment and procedures. ISO
18、 3417:1991, Rubber Measurement of vulcanization characteristics with the oscillating disc curemeter. 3 Preparation of test mixes for evaluation of carbon black in styrene-butadiene rubbers 3.1 Standard test formula The standard test formula is given in Table 1. The materials shall be NIST1) standard
19、 reference materials as indicated in Table 1, or shall be in accordance with equivalent national or International Standards. 3.2 Procedure 3.2.1 Equipment and procedure Equipment and procedure for preparation, mixing and vulcanization shall be in accordance with ISO 2393. 3.2.2 Mill mixing procedure
20、 The standard laboratory mill batch mass, in grams, shall be based on four times the formula mass (see Table 1). The surface temperature of the rolls shall be maintained at 50 C 5 C throughout the mixing. All mill openings shall be adjusted to maintain a good rolling bank at the nip of the rolls dur
21、ing mixing. 1) National Institute of Standards and Technology (formerly the National Bureau of Standards) of the USA. Duration Cumulative time (min)(min) a) Band the rubber with the mill opening set at 1,1 mm, and make 3/4 cuts every 30 s from alternate sides 22 b) Add the sulfur slowly and evenly a
22、cross the rubber . 24 c) Add the stearic acid. Make one 3/4 cut from each side26 d) Add carbon black evenly across the mill at a uniform rate. When about half the black has been incorporated, open the mill to 1,4 mm and make one 3/4 cut from each side. Then add the remainder of the carbon black. Whe
23、n all the black has been incorporated, open the mill to 1,8 mm and make one 3/4 cut from each side. Be certain to add the black that has dropped into the mill pan1016 e) Add the zinc oxide and the TBBS with the mill opening at 1,8 mm 319 f) Make three 3/4 cuts from each side322 Licensed Copy: sheffi
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