BS EN ISO 9771-1997 Plastics - Phenolic resins - Determination of the pseudo-adiabatic temperature rise of liquid resols when cured under acid conditions《塑料 酚醛树脂 测定可溶酚醛树脂在酸性条件下凝固时假.pdf

1、BRITISH STANDARD BS EN ISO 9771:1997 BS 2782-4: Method 451P: 1997 Plastics Phenolicresins 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 83.080.10BSENISO 9771:199

2、7 This British Standard, having been prepared under the directionof the Sector Board forMaterials and Chemicals, waspublished under the authorityof the Standards Boardand comes into effect on 15 May 1997 BSI 09-1999 ISBN 0 580 27293 1 National foreword This British Standard is the English language v

3、ersion of EN ISO 9771:1997. Itis 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 responsible

4、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 request t

5、o 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 the BSI S

6、tandards 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. Summary of

7、 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 aback cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated

8、in the amendment table on the inside front cover. Amendments issued since publication Amd. No. Date CommentsBSENISO9771:1997 BSI 09-1999 i Contents Page National foreword Inside front cover Foreword 2 Foreword iii Text of ISO 9771 1ii blankEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 977

9、1 February 1997 ICS 83.080.10 Descriptors: See ISO document Englishversion Plastics Phenolic resins Determination of the pseudo adiabatic temperature rise of liquid resols when cured under acid conditions (ISO 9771:1995) Plastiques Rsines phnoliques Dterminationde llvation de temprature pseudoadiaba

10、tique des rsols liquides thermodurcisen 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 members are bo

11、und 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 application to the

12、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 same status

13、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 Standardization Comit

14、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 EENISO9771:1997 BSI 09-1999 2 Foreword The text of the International Standard from Technical Committee ISO/TC 61 “Plastics

15、” 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 publication of an identi

16、cal 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 European Standa

17、rd: 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 ISO9771:1995 has been approved by CEN as a European Standa

18、rd without any modification.ENISO9771:1997 ii BSI 09-1999 Contents Page Foreword iii 1 Scope 1 2 Principle 1 3 Reagent 1 4 Apparatus 1 5 Procedure 2 6 Expression of results 2 7 Test report 2 Figure 1 Schematic diagram of apparatus 1ENISO9771:1997 BSI 09-1999 iii Foreword ISO (the International Organ

19、ization 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 establish

20、ed 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 standardization.

21、 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 Committee ISO/T

22、C61, 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 reactivity, tempe

23、rature measurements.iv blankENISO9771:1997 BSI 09-1999 1 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 are used as

24、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, depending on t

25、he 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 height: about 60

26、mm 4.2 Hollow foam block, made of phenolic-resin or polyurethane-resin foam with an apparent density of30 kg/m 3to 50 kg/m 3and 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 top edge of the

27、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 can affect the

28、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, containing 2 ml of g

29、lycol 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 apparatusENISO9771:1997 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 reaction vessel (4.1).

30、 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 mix resin and harde

31、ner 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 thermocouple through the

32、 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, 1cm 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 both the resin and t

33、he 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 Calculate the mean of the

34、 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) Maximum temperature: Ti

35、me 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) the maximum tempera

36、ture 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 %3 blankBS EN ISO 9771:1997 BS 2782-4: Method 451P: 1997 BSI 389 Chiswick High Road London W4 4AL

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