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1、BRITISH STANDARD BS 5293-5: 1992 ISO 1126:1992 Sampling and testing carbon black for use in the rubber industry Part 5: Method for determination of loss of mass on heating UDC 678.046.2:543.82 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:03:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI
2、BS 5293-5:1992 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 First Published as BS 5293 February 1976 First revision
3、 as BS 5293-5 January 1988 Second edition December 1992 The following BSI references relate to the work on this standard: Committee reference PRM/53 Draft for comment 92/38985 SA ISBN 0 580 21451 6 Committees responsible for this British Standard The preparation of this British Standard was entruste
4、d by the Plastics and Rubber Standards Policy Committee (PRM/-) to Technical Committee PRM/53, upon which the 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
5、:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5293-5:1992 BSI 08-1999i Contents Page Committees responsibleInside front cover National forewordii 1Scope1 2Principle1 3Apparatus1 4Procedure1 5Expression of results1 6Test report1 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:03:23 GMT+
6、00:00 2006, Uncontrolled Copy, (c) BSI BS 5293-5:1992 ii BSI 08-1999 National foreword This Part of BS 5293 has been prepared under the direction of the the Plastics and Rubber Standards Policy Committee and is identical with ISO 1126:1992 Rubber compounding ingredients Carbon black Determination of
7、 loss on heating, published by the International Organization for Standardization (ISO). This standard is a revision of BS 5293-5:1988 which is withdrawn. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their c
8、orrect application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, page 1 and a back cover. This standard has been updated (see copyright date) and may have h
9、ad amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:03:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5293-5:1992 BSI 08-19991 1 Scope This International Standard specifies a method for deter
10、mining the loss on heating of carbon black for use in the rubber industry. This loss on heating is due primarily to loss of moisture, but traces of other volatile materials may also be lost. This method is not applicable to treated carbon blacks which contain added volatile materials. 2 Principle A
11、test portion of carbon black is heated for 1 h at a temperature of 105 C or 125 C in a weighing bottle. The weighing bottle plus contents are allowed to cool in a desiccator to room temperature and weighed, and the percentage loss on heating calculated. 3 Apparatus 3.1 Oven, preferably gravity-conve
12、ction type, capable of maintaining a temperature of 105 C 2 C or 125 C 2 C. NOTE 1The loss on heating of a carbon black may depend upon the test temperature chosen. 3.2 Weighing bottle, squat-form, 30 mm in height and 60 mm in diameter, fitted with a ground-glass stopper. When larger samples are req
13、uired for other tests, use an open vessel of dimensions such that the depth of the black is no greater than 10 mm during conditioning. 3.3 Analytical balance, accurate to 0,1 mg. 3.4 Desiccator 4 Procedure 4.1 Precautions 4.1.1 Take the sample of carbon black in a tightly stoppered glass bottle or f
14、riction-top can. Allow the closed container to reach ambient temperature before starting the test. 4.1.2 Keep the weighing bottle stoppered when transferring to and from the desiccator, to prevent loss of carbon black due to air currents. 4.2 Determination 4.2.1 Dry the weighing bottle (3.2) and the
15、 stopper, with the stopper removed, in the oven (3.1) at a temperature of 105 C 2 C or 125 C 2 C for 30 min. Place the bottle and the stopper in the desiccator (3.4) and allow to cool to ambient temperature. Weigh the bottle with stopper to the nearest 0,1 mg. 4.2.2 Weigh to the nearest 0,1 mg about
16、 2 g of carbon black into the weighing bottle. 4.2.3 Place the weighing bottle, test portion and stopper in the oven for 1 h at a temperature of 105 C 2 C or 125 C 2 C, with the stopper removed. 4.2.4 Replace the stopper and transfer the bottle and contents to the desiccator. Remove the stopper and
17、allow to cool to ambient temperature. Replace the stopper on the weighing bottle and reweigh to the nearest 0,1 mg. 5 Expression of results Calculate the loss on heating, expressed as a percentage by mass, using the formula where 6 Test report The test report shall include the following particulars:
18、 a) a reference to this International Standard; b) all details necessary to identify the sample; c) the temperature used (105 C or 125 C); d) the results, and the units in which they have been expressed; e) any unusual features noted during the determination; f) any operation not included in this In
19、ternational Standard or regarded as optional. m0is the mass, in grams, of the weighing bottle and stopper; m1is the mass, in grams, of the weighing bottle, stopper and test portion before heating; m2is the mass, in grams, of the weighing bottle, stopper and test portion after heating. m1m2 m1m0 - -1
20、00 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:03:23 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5293-5: 1992 ISO 1126:1992 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It
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