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1、BRITISH STANDARD BS EN ISO 9771:1997 BS 2782-4: Method 451P: 1997 Plastics Phenolic resins Determination of the pseudo-adiabatic temperature rise of liquid resols when cured under acid conditions The European Standard EN ISO 9771:1997 has the status of a British Standard ICS 83.080.10 BS EN ISO 9771
2、:1997 This British Standard, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 May 1997 BSI 09-1999 ISBN 0 580 27293 1 National foreword This British Standard is the English l
3、anguage version of EN ISO 9771:1997. It is identical with ISO 9771:1995. The UK participation in its preparation was entrusted to Technical Committee PRI/42, Fibre reinforced thermosetting plastics and prepregs, which has the responsibility to: aid enquirers to understand the text; present to the re
4、sponsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on
5、 request to its secretary. Cross-references The British Standards which implement international 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 using the “Find” facility of
6、 the BSI Standards Electronic Catalogue. 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.
7、Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN ISO title page, page 2, the ISO title page, pages ii to iv, pages 1 and 2 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be
8、 indicated in the amendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments BS EN ISO 9771:1997 BSI 09-1999i Contents Page National forewordInside front cover Foreword2 Forewordiii Text of ISO 97711 ii blank EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM
9、EN ISO 9771 February 1997 ICS 83.080.10 Descriptors: See ISO document English version Plastics Phenolic resins Determination of the pseudo adiabatic temperature rise of liquid resols when cured under acid conditions (ISO 9771:1995) Plastiques Rsines phnoliques Dtermination de llvation de temprature
10、pseudoadiabatique des rsols liquides thermodurcis en conditions acides (ISO 9771:1995) Kunststoffe Phenolharze Bestimmung des pseudo-adiabatischen Temperaturanstiegs flssiger Resole bei Aushrtung unter sauren Bedingungen (ISO 9771:1995) This European Standard was approved by CEN on 1997-01-05. CEN m
11、embers are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on applic
12、ation to the Central Secretariat or to any CEN member. The European Standards exist in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the
13、 same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardi
14、zation Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 Copyright reserved to CEN members Ref. No. EN ISO 9771:1997 E EN ISO 9771:1997 BSI 09-1999 2 Foreword The text of the International Standard from Technical Committee ISO
15、/TC 61 “Plastics” of the International Organization for Standardization (ISO) has been taken over as an European Standard by Technical Committee CEN/TC 249 “Plastics”, the secretariat of which is held by IBN. This European Standard shall be given the status of a national standard, either by publicat
16、ion of an identical text or by endorsement, at the latest by August 1997, and conflicting national standards shall be withdrawn at the latest by August 1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this
17、 European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO 9771:1995 has been approved by CEN as
18、a European Standard without any modification. EN ISO 9771:1997 ii BSI 09-1999 Contents Page Forewordiii 1Scope1 2Principle1 3Reagent1 4Apparatus1 5Procedure2 6Expression of results2 7Test report2 Figure 1 Schematic diagram of apparatus1 EN ISO 9771:1997 BSI 09-1999iii Foreword ISO (the International
19、 Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been est
20、ablished has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardiz
21、ation. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 9771 was prepared by Technical Committe
22、e ISO/TC 61, Plastics, Subcommittee SC 12, Thermosetting materials. This second edition cancels and replaces the first edition (ISO 9771:1989), of which it constitutes a minor revision. Descriptors: Plastics, thermosetting resins, phenoplasts, tests, chemical tests, determination, chemical reactivit
23、y, temperature measurements. iv blank EN ISO 9771:1997 BSI 09-19991 1 Scope This International Standard specifies a method for determining the exothermic reactivity of thermosetting liquid phenolic resins when mixed with an acid hardener under specified conditions. The results of the determination a
24、re used as a means of assessing the behaviour of the resin during processing. 2 Principle A phenolic resin is mixed with an acid hardener and allowed to harden. The highest temperature reached is measured, as well as the time taken to reach this temperature. 3 Reagent 3.1 Suitable acid hardener, dep
25、ending on the composition of the resin, e.g. p-phenol sulfonic acid, technical grade, 65 % (m/m) 1 % (m/m) in water. 4 Apparatus (see Figure 1) 4.1 Reaction vessel: paper cup impregnated with polyethylene, with the following dimensions: diameter at base: about 60 mm diameter at rim: about 70 mm heig
26、ht: about 60 mm 4.2 Hollow foam block, made of phenolic-resin or polyurethane-resin foam with an apparent density of 30 kg/m3 to 50 kg/m3 and with a cavity to accommodate the reaction vessel (4.1). The cavity shall be arranged so that the surface of the reaction mixture lies about 30 mm below the to
27、p edge of the foam block and so that the reaction vessel sits firmly in the foam material. The thickness of the thermal-insulation layer between the reaction vessel and its surroundings shall be at least 60 mm. NOTE 1It is good practice to change the foam block periodically since wear of the block c
28、an affect the test result. 4.3 Non-metallic cover plate, for the foam block (4.2). 4.4 Thermocouple, with its hot junction immersed in glycol or other suitable liquid at the bottom of a test tube (4.7). 4.5 Temperature recorder 4.6 Pipette, nominal capacity 10 ml. 4.7 Test tube, 60 mm ? 16 mm, conta
29、ining 2 ml of glycol or other suitable liquid. 4.8 Stirring device: mechanical or hand stirrer. 4.9 Balance, accurate to 0,2 g. Figure 1 Schematic diagram of apparatus EN ISO 9771:1997 2 BSI 09-1999 5 Procedure Weigh 100 g 0,5 g of the resin sample, kept at a temperature of 23 C 0,2 C, into the reac
30、tion vessel (4.1). Condition the reaction vessel containing the test portion at 23 C 0,2 C, and place it in the foam block (4.2). Add 10 ml of hardener, also kept at 23 C 0,2 C, in one portion, using the pipette (4.6). Immediately after adding the hardener, start the temperature recorder (4.5) and m
31、ix resin and hardener thoroughly by stirring for 35 s. Other mixing times may be used if necessary, but they shall be mentioned in the test report. After mixing thoroughly, remove the stirrer and replace it by the test tube (4.7) containing the thermocouple (4.4). Lower the test tube with the thermo
32、couple through the cover plate (4.3) so that it dips into the reaction mixture with the bottom of the test tube located in the middle of the foam block, 1 cm above the bottom of the beaker. If a starting temperature of 23 C does not produce a distinct temperature peak, use a higher temperature for b
33、oth the resin and the hardener. If the resin is too reactive, use a smaller amount of catalyst. By means of the temperature recorder, record a) the maximum temperature reached; b) the time to reach the maximum temperature. Carry out the procedure twice. 6 Expression of results 6.1 Calculation Calcul
34、ate the mean of the measurements of maximum temperature, in degrees Celsius, and the mean of the measurements of the time, in minutes, taken to reach each maximum temperature, and report these means as the results. If variations greater than 5 % occur, repeat the test. 6.2 Precision (test error) Max
35、imum temperature: Time to reach maximum temperature: 7 Test report The test report shall contain the following information: a) a reference to this International Standard; b) all details necessary for the complete identification of the resin tested; c) the starting temperature, in degrees Celsius; d)
36、 the maximum temperature reached, in degrees Celsius; e) the time, in minutes, taken to reach the maximum temperature; f) the mixing time used. Repeatability: 3 % Reproducibility: 5 % Repeatability: 5 % Reproducibility: 5 % 3blank BS EN ISO 9771:1997 BS 2782-4: Method 451P: 1997 BSI 389 Chiswick Hig
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