BS 2782-10 Method 1006-1978 Methods of testing plastics - Glass reinforced plastics - Determination of volatile matter and resin content of synthetic resin-impregnated textile glas.pdf

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1、BRITISH STANDARD BS 2782-10: Method 1006:1978 Methods of testing Plastics Part 10: Glass reinforced plastics Method 1006: Determination of volatile matter and resin content of synthetic resin-impregnated textile glass fabric IMPORTANT NOTE. Before reading this method it is essential to read the fore

2、word, general introduction and instructions to BS2782, issued separately. UDC 678.5/8:678.01:543.813:678.6/.7.066:677.521BS2782-10:Method 1006:1978 This British Standard, having been prepared under the directionof the Plastics StandardsCommittee, was published under the authority ofthe Executive Boa

3、rd on 31October 1978 BSI 09-1999 The following BSI references relate to the work on this standard: Committee reference PLC/17 Draft for comment 77/51403 DC ISBN 0 580 10375 7 A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are res

4、ponsible for their correct 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, pages 1 and 2 and a back cover. This standard has been updated (see cop

5、yright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBS2782-10:Method 1006:1978 BSI 09-1999 i Contents Page 0 Introduction 1 1 Scope 1 2 References 1 3 Principle 1 4 A

6、pparatus 1 5 Test pieces 1 6 Procedure 1 7 Calculation and expression of results 2 8 Test report 2ii blankBS2782-10:Method 1006:1978 BSI 09-1999 1 0 Introduction Method 1006 is a revision and combination of Methods107J and107H of BS2782:1970 and provides a procedure for the determination of the amou

7、nt of volatile matter and of resin in synthetic resin-impregnated glass fabric. In the preparation of this method consideration has also been given to the method described in BS4584-11. This method is suitable for testing the product known as “pre-impregnated” glass fabric, i.e.synthetic resin-impre

8、gnated glass fabric that can be purchased as such and used for the manufacture of mouldings. It is not suitable for testing either glass fabrics that are impregnated with silicone resins or materials containing a filler that loses mass at570 C. NOTEResults obtained by this method on fabric which has

9、 not been desized will represent both resin content and size content. WARNING NOTE. This method does not necessarily detail all the precautions necessary to meet the requirements of the Health and Safety at Work etc. Act1974. Attention should be paid to any appropriate safety precautions, and the me

10、thod should only be operated by trained personnel. 1 Scope This method describes a procedure for determining the volatile matter and resin content of synthetic resin-impregnated textile glass fabric. 2 References The following standards publications are referred to in this method. BS 2648, Performan

11、ce requirements for electrically-heated laboratory drying ovens. BS 4244, Porcelain and silica crucibles. BS 4584, Metal-clad base materials for printed circuits Part 11: Bonding sheet material for use in the fabrication of multilayer printed boards . 3 Principle Volatile matter. The volatile matter

12、 of the material is determined by heating three test pieces at a comparatively low temperature and calculating the mean loss in mass. Resin content. The resin content of the material is determined by heating a further three test pieces at550 20 C, calculating the loss in mass as percentages, subtrac

13、ting the volatile matter from these latter values and then calculating the mean of the three results. 4 Apparatus The following apparatus is required. 4.1 Crucibles, silica or porcelain of appropriate size complying with the requirements of BS4244. 4.2 Drying oven with circulating fan, complying wit

14、h the requirements of BS2648. 4.3 Drip tray of convenient size. 4.4 Muffle furnace 5 Test pieces Use six test pieces 100 10 mm square, cut from the fabric as specified in the relevant British Standard for the fabric. If no British Standard exists and the fabric is in the form of of a roll, take two

15、sets of three pieces from positions along a line normal to the warp of the fabric, with the diagonals of the test pieces parallel to the warp and weft threads. Each set shall comprise one piece from the centre of the roll and the other two from positions on opposite edges of the roll with their oute

16、r extremities50 25mm from each edge or selvedge. Remove all loose particles and projecting fibres from the test pieces. 6 Procedure NOTEIf it is not required to determine variations across the material under test, it is permissible to treat each set of three test pieces as a single test portion. If

17、this is done, the calculations given in clause7 and the test report (see clause8) should be amended accordingly. 6.1 Determination of volatile matter. Weigh separately, to the nearest0.001g, three of the test pieces and suspend them in the oven maintained at the appropriate temperature as follows: a

18、) for polyester resin 120 5 C b) for epoxy resin163 3 C If it is expected that resin will drip from the test pieces when heated, place a tared drip tray under each. After15 0.25min remove the test pieces (and drip trays, if used), allow them to cool in a desiccator and reweigh them to the nearest0.0

19、01g. 6.2 Determination of resin content. Heat three crucibles in the muffle furnace at550 20 C for15min, allow them to cool in a desiccator and weigh them to the nearest0.001g. Cut each of the remaining test pieces into pieces of convenient size and place the pieces from each test piece into separat

20、e crucibles, taking care not to lose any fragments. Reweigh each crucible with its contents to the nearest0.001g. Heat the crucibles and contents in the muffle furnace at550 20 C for1h. Remove the crucibles, allow to cool to room temperature in a desiccator and reweigh to the nearest0.001g. Repeat t

21、he heating, cooling, and weighing until the mass of each crucible is constant to within0.002g.BS2782-10:Method 1006:1978 2 BSI 09-1999 7 Calculation and expression of results 7.1 Percentage of volatile matter. Calculate as a percentage the volatile matter (V o ) of each test piece by the formula: if

22、 no drip tray is used if no drip tray is used where m 1is the mass of each test piece before heating (and drip tray if used) (in g) m 2is the mass of each test piece after heating (and drip tray if used) (in g) m 3is the mass of the drip tray (if used) (in g) Calculate the volatile matter content of

23、 the material(V) as the arithmetric mean of the three results. 7.2 Percentage resin content. Calculate as a percentage the resin content (R o ) of each test piece by the formula: where m 4is the mass of the crucible (in g) m 5is the mass of the crucible plus test piece before combustion (in g) m 6is

24、 the mass of the crucible plus test piece after combustion (in g) Calculate the resin content as the arithmetric mean, R, of the three results. 8 Test report The test report shall include the following particulars. a) A complete identification of the material being tested including type, source, man

25、ufacturers code numbers, previous history, etc. b) A reference to this British Standard method (i.e. BS2782:Method1006:1978). c) The arithmetric mean and the individual results for the three determinations of volatile content. d) The arithmetric mean and the individual results for the three determin

26、ations of resin content. V o 100 m 1 m 2 m 1 - = V o 100 m 1 m 2 m 1 m 3 - = R o 100 m 5 m 6 m 5 m 4 - V =3 blankBS 2782-10: Method 1006:1978 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It pr

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