1、I - AECMA PREN2558 88 LOL23LL 000347b- 9 A. E. C. M .A. STAN DARD NORME A.E.C.M.A. A.E.C.M.A. NORM prEN 2558 issue P 1 October 1988 DIT PAR LASSOCIATION EUROPENNE DES CONSTRUCTEURS DE MATRIEL AROSPATIAL 88, boulevard Malesherbes, 75008 PARIS - TL. 45-63-82-85 UDC : Key words ENGLISH VERSION Aerospac
2、e series Carbon fibre preimpregnates Test method for the determination of the percentage of volatile matter Srie arospatiale Luft- und Raumfahrt Primprgns de fibres de carbone Kohlenstoffaser-Prepreg Mthode dessai Prfmethode pour la dtermination zur Bestimmung du pourcentage de matires volatiles des
3、 Anteiles von flchtigen Bestandteilen This Aerospace Series pre-standard has been drawn up under the responsibility of AECMA (Association Europenne des Constructeurs de Matriel Arospatial). It is published on green paper for the needs of AECMA-Members. It has been technically approvedby the experts
4、of the concerned AECMA Commission following comment by the Member countries. Subsequent to the publication of this pre-standard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After e
5、xamination and signature of the AECMA Standard Checking Centre (NPS) and formal agreement of the Official Services of the Member countries it will be submitted as a draft European Standard o CEN (European Committee for Standardization) for final vote. Nota - Extra copies can be supplied by B.N.A.E.
6、- 8, rue Moreau-Vauthier - 92100 BOULOGNE-BILLANCOURT Edition approved for publication Comments should be cent within six months C7 Chairman 17th October 1988 A.E.C.M.A. Mr. BEZAUD after the date of publication decision 88, Bd. Malesherbes 75008 PARIS - FRANCE aecma 1988 AECMA PREN2558 88 W 101231L
7、0003L177 O W prEN 2558 Page 2 0619XSP1287T5 Contents 1 Scope and field of application 2 References 3 Definitions 4 Principle of the method 5 Apparatus 6 Standard atmosphere for conditioning and testing 7 Sampling and test specimens 8 Procedure 9 10 Test report Calculation and expression of results A
8、ECMA PREN2558 88 LOLZ3LL 00034782-pm prEN 2558 Page 3 1 i.1. This standard specifies a method for determining the percentage on voiat5le mutter in a carton fibre preinipregnate, for aerospcrce use. Scope and field of application 1.2 This standard does rrot give ariy directioris necessary to meet the
9、 health and safety requirements. It is the responsibility 05 the user of this standard to adopt appropriate health and saiety precautions. 2 Referesices Eti 2743 Aerospace series - Beinfo 4 %lastics. Standard atmospheres for fy r conditioning and testing . 3 Definitions k carbon fibre preimpregtiate
10、 with a thennosetting or thermoplastic resin is a materia: that cai be piirchased in the form of a synthetic resin impregnated carbon fibre unidirectional sheet, tape or woven fabric arid used for the inanuf acture of moulded components. it Principle of the method D of the difference in nass by mari
11、s of weighing before aiid ofter conditioning at an eievated temperature for 8 specified time, expressed as percentage of volatile matter wich respect to the initiai miss. 5 Apparatus 5.1 Balar,ce with ar, accuracy of O,. mg 5.2 Template metal of standard specimen 5.3 Ancillary items such as sharp cu
12、tting knife a116 tweezers 5.4 Tray of suitable matefil., e.g. metcl or ceramic, if necessary to prebett tlie loss of any resix: that may drip from the specimen wlille it ia beifig heated 5.S Oven capable of maintaining the agreed temperature wich an accuracy 02 - -1- 5OC and provided wich G fan for
13、circulating the air 5.6 Decicccitor containing a suitabie ryiiig agent (for example, silica gel, calcium chloride, phosphorus pentoxide), 1) In preptiration 0619XSP078ET5 7 AECMA PREN2558 88 W LOL2311 0003479 V prEW 2558 Yuge 4 6 Standard tmosphere for conditiouing and testing 6.1 Conditioning 6.1.1
14、 Conditioning of material stored at mbient temperature For mciteriai stored at ambieiit temperature, the amount of material required for testing shall be sainpled and conditioned in the standird testing atnosphere (see clause 6.2.1) Tor a m:Lnimum of 2 h, unless otherwise specified. 6.1.2 Conditioni
15、ng of material stored below ambieiit temperature For naterial stored at temperatures lower than ambicnt temperature, the material, suitably packed in ail airtight ad solvent resistant blbrg to prevent nioistue pick-up, shall be allowed to reach nhieiit teniperature ovc:r a perio o2 t5me according te
16、 the maco of the package. This time shall not be less tliai: 8 h and the. actual tiice shall be recorded in the report. When the msterial hac reached the zmbient iemperature, the amouiif: required for testing shall be sampl-ed and conditimed in the standard testing atnosphere (see clause 6.2.:; for
17、a minimum of 2 h, unless otherwise specified. 6.2 Testing 6.2.1 Standard atmosphere for testing The tests shall be carried out at (23 + 2) C and (50 $. 5) % relative humidity. The ctaiidard atmosphere ohail be iri accordance with th; standard EN 2743, 6.2.2 Time interval between conditioning and tes
18、ting Arter conditioning, the tes2 shall be carried out within 6 h, unless otherwise speciLiec!, the specimen being kept in the staridard atmosphere untii the test is carried out. Sampiii-ig End test specimens 7.1 Test specimen The specimen shall be square and have a length of (100 - .t i) LEI and a
19、width o5 (ici0 f 1) mm. Other diuensioris of the test specimen niay be used, subject to gree L v= , 100 22 a tray is used where : V is the content of volatile natter expressed s a percentage rif Ehe originr? mass m is the initid mess of the specimen (aid tray, if tised) in g, n:, io the mass of Che
20、specimen (and tray, if used), tri g, after heaiing, m Cal-culate the arithmetic mean of the vdues obtained For V. 1 ,G is the nass of thti tray (if used) in g. 3 0619XSP0788T5 , _I- AECMA PREN2558 88 10L23L1i 0003Li8L 2 = prEN 2558 Page 6 10 Test report The test report shall include the following in
21、formation : 10.1 Reference to the type of preimpregnate, with complete description including prepreg batch number 10.2 Reference to this test method 10.3 Description of the sampling method 10.4 Number of test specimens used, if different from this standard 10.5 Dimensions of the test specimens, if d
22、ifferent from this standard 10.6 Standard atmosphere used for conditioning and testing and actual time used for conditioning 10.7 The temperature and tine used in the oven 10.8 The arithmetic mean value of the content of volatile matter, expressed as a percentage of the original mass 10.9 The indivi
23、dual values 10.10 Observations on any circumstances liable to influence the results. 0619XSP1287T5 AECMA PREN2558 88 W LOL23lrL 0003982 4 E prEN 2558 Page 7 Dimensions in millimetres I 1 I - t 50 .t, Warp yarns direction . Width Figure 1 A - Example of diagonal positioning of test specimens on woven
24、 textile carbon fabric sample across the width Dimensions in millimetres Figure 1 B - Example of diagonal positioning of test specimens on woven textile carbon fabric sample along an axis inclined at an angle as close as possible to the weft direction AECMA PREN2558 88 m LOL23LL 0003Li83 b m prEN 2558 Page 8 Y Dimensions in millimetres Figure 2 - Example of diagonal positioning of test specimens on unidirectional sheet or continuous tape sample 0619XSP1287T5 e a
