1、 - STD-BSI BS EN IS0 9771-ENGL 1997 m LbZibbS Ob15155 Yb8 m BRITISH STANDARD Plastics - Phenolic resins - Determination of the pseudo-adiabatic temperature rise of liquid resols when cured under acid conditions BS EN IS0 9771 : 1997 BS 2782 : Part 4 : Method 451P : 1997 * I3 * The European Standard
2、EN IS0 9771 : 1997 has the status of a British Standard ICs 83.080.10 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW STD-BSI BS EN IS0 7771-ENGL 3777 Lb24bb7 Ob3515b AT4 BS EN IS0 9771 : 1997 This British Standard, having been prepared under the direction of the Sector Board
3、for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 May 1997 O BSI 1997 ISBN O 580 27293 1 National foreword This British Standard is the English language version of EN IS0 9771 : 1997. It is identical with IS0 9771 : 1995. The UK partici
4、pation in its preparation was entrusted to Technical Committee PW42, Fibre reinforced thermosetting plastics and prepregs, which has the responsibility to: - aid enquirers to understand the te*, - present to the responsible intemationaVEuropean committee any enquiries on the interpretation, or propo
5、sals for change, and keep the UK interests informed - monitor related inteniational and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement inter
6、national 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 Standards Electronic Catalogue. Compliance with a British Standard does not of its
7、elf confer immunity from legal obligations. 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 to 3, a biank page, an inside back cover and a back cover. Amendments issued since publicat
8、ion Amd. No. I Date I Text affected STD-BSI BS EN IS0 4771-ENGL 1997 lbZLibb9 Ob15157 730 EUROPEAN STANDARD NORME EUROPEENNE EUROPISCHE NORM EN IS0 9771 February 1997 ICs 83.080.10 Descriptors: see IS0 document English version Plastics - Phenolic resins - Determination of the pseudo-adiabatic temper
9、ature rise of liquid resols when cured under acid conditions (IS0 977 1 : 1 995) Plastiques - RCsines phnoliques - Dtermination de LClCvation de tmrature peudondiabtique des rsols liquides theriodurcis en conditions acides (IS0 971:1995) Kuriststoffe - Phenolharze - Bestimrmg dcs pseudo-adiabatische
10、n Teaperaturanstiegs flssiger Resole bei Awhrtmg mter sauren Bedingungen (IS0 9771:1995) This European Standard was approved by CEW on 1997-01-05. CEW members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of
11、a national standard without any alteration. Up-to-date lists and bibliographicat references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN nimkr. The Europcan Standards exist in three official versions (English, French, German). A version i
12、n any other language made by translation under the responsibility of a CEN mnkr into its own language and notified to the Central Sccretariat has the som status as the officia: vorsions. CEN nrmkrs arc the national standards bodies of Austria, Belgiun, Demark, Finland, France, Gcmny, Grmc, Iceland,
13、Ireland, Italy, Luxcmbwrg, Netherlands, Norway, Portugal, Spain, Sueden, Switzerland and United Kingdom. CEN European Committee for Standardization Canit EuropCm de Normalisation Europisches Komitee fr Normng Catre1 Sccretariat: rue dc Stessart,36 8-1050 Bnrrelr 0 lW7 Copyright reserved to CEN mankr
14、s Ref. NO. EN IS0 9771:1W7 E - STD-BSI BS EN IS0 9771-ENGL 1977 W Lb24bb7 Ob15158 b77 M EN IS0 9771 : 1997 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 Stan
15、dard by Technical Committee CENTTC 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 identical text or by endorsement, at the latest by August 1997, and conflicting national standards shall be
16、 withdrawn at the latest by August 1997. According to the CENKENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg,
17、Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard IS0 9771 : 1995 has been approved by CEN as a European Standard without any modification. STD*BSI BS EN IS0 9771-ENGL 1997 = Lb2LibbS Ob15159 503 EN IS0 9771 :
18、1997 I N T E R NAT I O NA L STAN DARD IS0 9771 Second edition 1995-05-01 Plastics - Phenolic resins - Determination of the pseudo-adiabatic temperature rise of liquid resols when cured under acid conditions Plastiques - Rsines phnoliques - Dtermination de llvation de temprature pseudoadiabatique des
19、 rsols liquides thermodurcis en conditions acides Reference number IS0 9771 :1995(E) - STD-BSI BS EN IS0 9771-ENGL 1997 lb24bb9 Ob151b 225 EN IS0 9771 : 1997 Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies).
20、The work of preparing International 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 non-g
21、overnmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (I EC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies f
22、or voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 9771 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 12, Thermosetting materials. This second edition cancels and replaces t
23、he first edition (IS0 9771:1989), of which it constitutes a minor revision. Dewripton: plastics, thermosetting resins, phenoplasts, tests. chemical tests, determination, chemical reactivity, temperature measurements. II - - STD.BSI BS EN IS0 9771-ENGL 1777 m 1b2qbb7 Ob15Lb1 LbL m EN IS0 9771 : 1997
24、Plastics - Phenolic resins - Determination of the pseudo-adiabatic temperature rise of liquid resols when cured under acid conditions 1 Scope This Internatiral Standard specifies a method for determining tke exothermic reactivity of thermo- setting liquid phenolic resins when mixed with an acid hard
25、ener under specified conditions. The results of the determination are used as a means of assessing the behaviour of the resin during processing. - - _. - = - rn * 2 Principle cf3 * A phenolic resin is mixed with an acid hardener and allowed to harden. The highest temperature reached is measured, as
26、well as the time taken to reach this temperature. 3 Reagent 3.1 Suitable acid hardener, depending on the composition of the resin, e.g. pphenol sulfonic acid, technical grade, 65 % (m/m) i; 1 % (m/m) in water. 4 Apparatus (see figure 1) 4.1 Reaction vessel: paper cup impregnated with polyethylene, w
27、ith the following dimensions: - diameter at base: about 60 mm - diameter at rim: about 70 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 accommo- date the reaction vessel (4.1 1. The cavity shall be ar
28、ranged so that the surface of the reaction mixture lies about 30 mm below the top 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 1 It
29、 is good practice to change the foam block periodically since wear of the block can affect the test re- sult. 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 Temperatur
30、e recorder. 4.6 Pipette, nominal capacity 10 ml. 4.7 lest tube, 60 mm x 0 16 mm, containing 2 ml of glycol or other suitable liquid. 4.8 Stirring device: mechanical or hand stirrer. - height: about 60 mm 4.9 Balance, accurate to 0,2 g. 1 STDmBSI BS EN IS0 777L-ENLL 1997 Lb24bb9 ObL51b2 UT8 EN IS0 97
31、71 : 1997 Dimensions in millimetres Thermocouple connected to temperature recorder 7 Cover plate 60 03 , - Reaction vessel 5 Procedure Weigh 100 g f 0,5 g temperature of 23 OC Test tube Reaction composition (resin) Foam block Glycol or other suitable liquid I 0190 1 Figure 1 - Schematic diagram of a
32、pparatus of the resin sample, kept at a f 0,2 OC, into the reaction ves- sel (4.1). Condition the reaction vessel containing the test portion at 23 OC f 0,2 OC, and place it in the foam block (4.2). Add 10 ml of hardener, also kept at 23 OC f 0,2 OC, in one portion, using the pipette (4.6). Immediat
33、ely after adding the hardener, start the temperature recorder (4.5) and mix resin and hardener thoroughly by stirring for 35 s. Other mixing times may be used if necessary, but they shall be men- tioned in the test report. After mixing thorough:, re- move the stirrer and replace it by the test tube
34、(4.7) containing the thermocouple (4.4). Lower the test tube with the thermocouple 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 OC
35、 does not produce a distinct temperature peak, use a higher temperature for both 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 maximm temperature reached; 2 b) the time to reach the maximum tFrnperature
36、. Carry out the procedure twice. 6 Expression of results 6.1 Calculation Calculate the mean of the measurements of maxi- mum temperature, in degrees Celsius, and the mean of the measurements of the time, in minutes, taken t=? reach each maximum temperature, and report these means as the results. If
37、variations greater than 5 % occur, repeat the test. 6.2 Precision (test error) Maximum temperature: Repeatability: f3 % Reproducibility: f5 % Time to reach maximum temperature: Repeatability: f5 % Reproducibility: f5 % STD.BSI BS EN IS0 7771-ENGL 1797 W 1b24bb9 Ob15Lb3 T34 = EN IS0 9771 : 1997 7 les
38、t report c) the starting temperature, in degrees Celsius; The test report shall contain the following information: d) the maximum temperature reached, in degrees Celsius; a) a reference to this International Standard; b) all details necessary for the complete identifi- e) the time, in minutes, taken to reach the maximum temperature; cation of the resin tested; f) the mixing time used. 3 9771 : 1997 BS 2782 : Method 451P : 1997 Part 4 : BSI 389 Chiswick High Road London w4 4AL BSI - British Standards Institution
