1、STD-BSI BS EN IS0 8987-ENGL 1778 Lb24bb7 073170i T88 BS EN IS0 8989:1998 BS 2782-4: Method 4512 1998 BRITISH STANDARD Plastics - Liquid phenolic resins - Determination of water miscibility The European Standard EN Is0 8989:1998 has the status of a British Standard ICs 83.080.10 NO COPYING WITHOUT BS
2、I PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN IS0 8989:1998 AmdNo. This British Standard, having been prepared under the direction of the Sector Board for Materiais and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 November 1998 Date Text a
3、ffected O BSI 1998 ISBN O 680 30273 3 National foreword This British Standard is the Enghsh anguage version of EN IS0 8989:1998. It is identical with IS0 8989: 1995. It supersedes BS EN IS0 8989: 1995 which is withdram The K participation in its preparation was entrusted to Technical Committee Pm1,
4、Testing of piastics, which has the responsibility to: - aid enquirers to understand the text; - present to the responsible internationaUESwopean committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; - monitor related international and European de
5、velopments and promulgate them in the UK A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normaliy include an annex which lists nodve references to international publicati
6、ons with their corresponding European publications. The British Standards which implement internationai or European publications referred to in this document may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find”
7、facility of the BSI Standards Electronic Caalogue. 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 obl
8、igations. Summary of pages This document comprises a front cover, an inside front cover, the EN IS0 title page, the EN IS0 foreword page, the IS0 title page, page ii, pages 1 and 2, the annex ZA page and a back cover. Amendments issued since publication - STD-BSI BS EN IS0 8787-ENGL 1778 W LbZqbb7 0
9、73170b 850 W EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN IS0 8989 August 1998 ICs 83.080.1 o Descriptors: 808 IS0 document Supersedes EN IS0 8989:1995 English version Plastics - Liquid phenolic resins - Determination of water miscibility (IS0 8989: 1 995) Kunststoe - FlusSige Phenolharze -
10、Bestimmung der Waswverdnnbackeit (Is0 8989:1995) This European standard wasapprowrd by CEN on 12 June 1998. CEN members are bomdocomplywith the CENICENELEC Intemal Reguiawhichtheonsforgivingthis European standard the status at a national standard without any alteration. Uptodate lista and MMiographi
11、cai references concerning such national standards may be obtained on appiiCation ohe central seorstarlat or to any CEN member. This European standard exists in three offidal verdons (English, French. German). A version in any other language made by translation under the iesponsibility of a CEN membe
12、r into its own language and noafied to the Centrai secreteriat has the same status as the offidel veisions. CEN members are the national standards bodies of Austria. Belgium, Czech Republic. Denmeik, Finland, France, Gennany, Qreece. Iceland, Ireland, My, Luxembourg, Netheriands, Noway, Pomigal, Spa
13、in, Sweden, Switzerland and United Kingdom. * * B EUROPEAN COhMTTEE FOR STANDARDEATION COMITE EUROPEEN DE NORMALISATION EUROPAISCHES KOMITEE FUR NORMUNG Q 1998 CEN Ail rights of exploitation in any form and by any means resewed worldwide for CEN national Members. Ref. No. EN IS0 89891 998 E STD*BSI
14、BS EN IS0 8789-ENGL 1778 Lb24bb7 0733707 777 W EN IS0 8989:1998 Foreword The text of the International Standard from Technical Committee ISO/TC 61 Plastics“ of the International Organization for Standardization (ISO) has been taken over as an European Standard by Technical Committee CEN/TC 249 Plast
15、ics, the secretariat of which is held by IBN. This European Standard replaces EN IS0 8989:1995. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by February 1999, and conflicting national standards sh
16、all be withdrawn at the latest by February 1999. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland. Irel
17、and, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard IS0 8989:1995 has been approved by CEN as a European Standard without any modification. NOTE: Normative references to International Stan
18、dards are listed in annex ZA (normative). VI * - STD-BSI BS EN IS0 8487-ENGL 1778 W Lb24bb7 0733708 b23 EN IS0 8989:1998 INTERNATIONAL STANDARD IS0 Second edition 19951 2-1 5 Plastics - Liquid phenolic resins - Determination of water miscibility Plastiques - Rsines phnoliques liquides - Dtermination
19、 de ia tolrance leau Reference number IS0 8989:1995(E) STD.BS1 BS EN IS0 8787-ENGL L998 Lb2Ybb7 0733707 5bT EN IS0 8989:1998 Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing Internation
20、al Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and nongovernmental, in liaison with ISO,
21、also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Intern
22、ational Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 8989 was prepared by Technical Committee ISO/TC 61, Plesrics, Subcommittee SC 12, Thermosetting materials. This second edition cancels and replaces the first edition (IS0 8989:19881 wh
23、ich has been revised so that the test is carried out with grade3 water as defined in IS0 3696 rather than distilled water. Dowrlpton: plastics. resins, liquid resins, phenoplasts. tests, mixing tests, determination, mixing water. i - STD-BSI BS EN IS0 8989-ENGL 1998 Lb24bb9 073L710 281 EN IS0 8989:1
24、998 Plastics - Liquid phenolic resins - Determination of water miscibility 1 Scope The determination is performed at a temperature of 23 “C I0,l “C. This International Standard specifies a method for the determination of the miscibility of water with liquid phenolic resins. Water is added to the res
25、in until turbidity persists for a of 3o after agitation. Water miscibility is dependent on the conditions and on the degree of condensation of the resin. 4 Reagent Water, grade 3 as defined in IS0 3696. 2 Normative references The following standards contain provisions which, through reference in thi
26、s 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 on this international Standard are encouraged to in- vestigate the possibility of applying the most rece
27、nt editions of the standards listed below. Members of IEC and IS0 maintain registers of currently valid Inter- national Standards. IS0 3851 :1984, Laboratory glassware - Burettes - Part 1: General requirements. IS0 385-2:1984, Laboratory glassware - Burettes - Part 2: Burettes for which no waiting t
28、ime is specified. IS0 6543 980, Short solid-stem thermometers for pre- cision use. IS0 3696:1987, Water for analytical laboratory use - Specification and test methods. 5 Apparatus 5.1 Beaker, of capacity 100 ml, or a larger-capacity container, depending upon the degree of water mis- cibility (see 7.
29、2, second paragraph). 5.2 Thermometer, short solicktern type, range 19 OC to 31 OC, graduated in 0,l “C divisions: STC/O,1/19/31 in accordance with IS0 654 5.3 Magnetic stirrer. 5.4 Burette, nominal capacity 50 ml, graduated in O, 1 ml divisions, conforming with the requirements of class A of IS0 38
30、51 and IS0 385-2. 5.5 Analytical balance, accurate to 0,Ol g. 6 Conditioning and test temperature The determination shall be performed at 23 “C I 0,l OC. Prior to testing, the resin and grade 3 water (clause 4) shall be conditioned at that temperature. 3 Principle Determination of the percent by mas
31、s of water needed to obtain turbidity in the liquid phenolic resin. 1 EN IS0 8989:1998 7 Procedure 7.1 Preliminary test When the water miscibility of the resin to be tested is unknown, a preliminary test shall be performed to de- termine its approximate value. NOTE 1 For some resins, it may be of in
32、terest to measure both the opalescent turbidity and the opaque turbidity. (In the latter case, the mixture becomes milky or precipitation occurs.) If the opaque turbidity is also measured, it will be necessaty to record separately the volume VI of water re- quired to produce opalescent turbidity and
33、 the volume V2 required to produce opaque turbidity. 8 Expression of results 7.2 Actual test Based on the result of the preliminary determination (7.11, a test portion of 10 g to 50 g is chosen for the actual test. Weigh the test portion, to the nearest 0,Ol g, into the 100 ml beaker (5.1). If the e
34、xpected water miscibility (.e. that determined in 7.1, if it was unknown) exceeds 900 % (drn), use a container of larger volume. Verify, using the thermometer (5.21, that the tempera- ture of the resin is 23 OC f O, 1 “C. Place the beaker on the magnetic stirrer (5.3). By means of the burette (5.41,
35、 add grade 3 water, also preconditioned at 23 OC I 0,l OC, in accordance with the following procedure: the first addition shall be approximately 50 % of the quantity expected to be required to reach the miscibility limit (.e. approximately 50 % of that determined in the preliminary test if the misci
36、bility was unknown); subsequent additions shall be approximately 10 % of the quantity expected to be required, until turbidity occurs and vanishes again upon stirring; verify with the thermometer that the temperature of the mixture is 23 OC f 0.1 OC, then resume the addition of water dropwise until
37、the turbidity per- sists for at least 30 s. Record the volume (V ml) of water added. The miscibility of the resin with water WM, expressed as a percentage by mass, is given by the formula V -x 100 m where V is the volume, in millilitres, of water added (.e. Vg if it is assumed that the density of wa
38、ter is 1 kg/l at 23 OC); is the mass, in grams, of the test portion. NOTE 2 It is also possible to express the results as the ratio where x = WM/1 OO. m 1 :x 9 Test report The test report shall include the following information: a) a reference to this International Standard; b) all details necessary
39、 for complete identification of the resin tested; ci the test result, calculated in accordance with clause 8; d) the date of the test. NOTE 3 If both opalescent turbidity and opaque turbidity were determined, as discussed in 7.2, note 1, there will be two results. 2 EN IS0 8989:1998 Annex ZA (normat
40、ive) Nomiative references to international publications with their relevant European publications This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are
41、 listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. Publication Year Title
42、- EN lear IS0 3696 1987 Water for analytical laboratory use - Specification and test methods EN IS0 3696 1995 BS EN IS0 8989:1998 BS 2782-4: Method 45lE 1998 BSI 389 Chiswick High Road London w4 4AL STD.BS1 BS EN IS0 8989-ENGL 1778 1b24bb9 0731713 T BSI - British Standards Institution BSI is the ind
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