1、BRITISH STANDARD BS EN ISO 176:2005 Plastics Determination of loss of plasticizers Activated carbon method The European Standard EN ISO 176:2005 has the status of a British Standard ICS 83.080.01 BS EN ISO 176:2005 This British Standard, was published under the authority of the Standards Policy and
2、Strategy Committee on 17 February 2005 BSI 17 February 2005 ISBN 0 580 45488 6 National foreword This British Standard is the official English language version of EN ISO 176:2005. It is identical with ISO 176:2005. It supersedes BS EN ISO 176:2000 which is withdrawn. The UK participation in its prep
3、aration was entrusted to Technical Committee PRI/21, Testing of plastics, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Additional information When a container specified in 3.4 is to be placed in a liquid bath the
4、ingress of liquid may be prevented by fixing one end of a short length of tubing into the hole in the lid so that the free end of the tubing is above the surface of the liquid when the container is immersed. The grain size of the activated carbon referred to in 3.6 is not critical provided that all
5、dust which tends to adhere to the sample is eliminated. A suitable carbon is activated charcoal for chromatographic purposes, grain size 1.4 mm to 2.8 mm. The carbon is sieved through a sieve of nominal mesh size 1.4 mm complying with the requirements of BS 410, Test sieves, and the residue remainin
6、g on the sieve is retained for use. Warning note This British Standard method which is identical with EN ISO 176 does not necessarily detail all the precautions necessary to meet the requirements of the Health and Safety at Work etc. Act 1974. Attention should be paid to any necessary safety precaut
7、ions, and the method should only be operated by trained personnel. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, o
8、r by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer im
9、munity from legal obligations. aid enquirers to understand the text; present to the responsible 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 th
10、em in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, pages ii and iii, a blank page, pages 1 to 4, an inside back cover and a back cover. The BSI copyright notice displayed in this document i
11、ndicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 176 February 2005 ICS 83.080.01 Supersedes EN ISO 176:1999 English version Plastics - Determination of loss of plasticizers - Activated carb
12、on method (ISO 176:2005) Matires plastiques - Dtermination des pertes en plastifiants - Mthode au charbon actif (ISO 176:2005) Kunststoffe - Bestimmung der Weichmacherabgabe - Aktivkohleverfahren (ISO 176:2005) This European Standard was approved by CEN on 4 November 2004. CEN members are bound to c
13、omply 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 Central
14、Secretariat or to any CEN member. This European Standard exists 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 as the
15、official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain,
16、Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels 2005 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Mem
17、bers. Ref. No. EN ISO 176:2005: E I NESO 71:6002( 5E) 2 Foreword This document (EN ISO 176:2005) has been prepared by Technical Committee ISO/TC 61 “Plastics“ in collaboration with Technical Committee CEN/TC 249 “Plastics“, the secretariat of which is held by IBN. This European Standard shall be giv
18、en the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2005, and conflicting national standards shall be withdrawn at the latest by August 2005. This document supersedes EN ISO 176:1999. According to the CEN/CENELEC Internal Regula
19、tions, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Nor
20、way, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 176:2005 has been approved by CEN as EN ISO 176:2005 without any modifications. ENISO176:2005 Reference number ISO 176:2005(E) OSI 5002INTERNATIONAL STANDARD ISO 176 Second ed
21、ition 2005-02-01 Plastics Determination of loss of plasticizers Activated carbon method Matires plastiques Dtermination des pertes en plastifiants Mthode au charbon actif ENISO176:2005IS:671 O5002(E) DPlcsid Fremia ihTs PDF file may ctnoian emdebt dedyfepcaes. In ccaocnadrw eith Aebods licensilop gn
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24、to sneeru that the file is suitlbae fosu re yb ISO memdob rebeis. In tlnu ehikletneve y ttah lborp aem leratit gno it is f,dnuo plsaee inform ttneC ehlar Secrteiraat ta the serddaig sleb nevwo. ISO 5002 All irthgs erse.devr lnUeto sswrehise specified, on trap fo this lbupictaion maeb y cudorperro de
25、 tuilizi den yna form ro na ybm ynae,s lecetrinoc ro mecinahcal, inclidung tohpcoiypodna gn micrfoilm, wittuoh repmissii non writign from ietI rehSa Ot tsserdda eh ebolw or ISOs memreb i ydobn the cnuotrfo y ttseuqer ehe.r ISO cirypothg fofice saCe tsopale 65 eneG 1121-HC 02 av leT. 4 + 10 947 22 1
26、11 xaF0 947 22 14 + 9 74 E-mail coirypthgiso.o gr We bwww.is.o gro Pulbisdehi n Switlrez dnaii ISO 5002 Allr ithgsr esedevrENISO176:2005IS:671 O5002(E) I SO 5002 All irthgs ersedevr iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards b
27、odies (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 established has the right to be represented on that committee. International organizati
28、ons, 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. International Standards are drafted in accordance with the rules given in the
29、 ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. 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 t
30、he member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 176 was prepared by Technical Committee ISO/TC 61, Plastics, Sub
31、committee SC 6, Ageing, chemical and environmental resistance. This second edition cancels and replaces the first edition (ISO 176:1976), Clause 8 of which is now Clause 9 and a new Clause 8 has been added. ENISO176:2005blank 5002:671OSINEINTENRATIONAL TSANDADR IS:671 O5002(E)I SO 5002 All irthgs er
32、sedevr 1Plastics Determination of loss of plasticizers Activated carbon method 1 Scope This International Standard specifies two empirical methods for the quantitative determination of the loss of mass from a plastic material under defined conditions of time and temperature, in the presence of activ
33、ated carbon. These methods are used, in particular, for the quantitative determination of the loss on heating of plasticizers from plasticized plastic materials, in which case it is generally assumed that no significant amounts of other volatile materials are present. These are empirical test method
34、s, suitable only for a rather rapid comparison of the losses of plasticizers or, in general, of volatile compounds, from different plastics. They may also be employed for the comparison of different types of plasticizers; in this case, standard compounds should be prepared, on the basis of a well ch
35、aracterized resin, with known ratios of resin to plasticizer. NOTE These comparisons are possible only if the test specimens are of the same thickness. If it can be assumed that, after reconditioning, the moisture content of the exposed specimens is equal to that obtaining after the original conditi
36、oning, the effect of moisture may be ignored. Two methods are specified: Method A: The test specimens are in direct contact with the carbon; this method is particularly useful for materials that have to be tested at relatively low temperatures because they flow at higher temperatures. Method B: The
37、test specimens are placed in wire cages that prevent direct contact between the test specimens and the carbon. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated reference
38、s, the latest edition of the referenced document (including any amendments) applies. ISO 291, Plastics Standard atmospheres for conditioning and testing ISO 293, Plastics Compression moulding of test specimens of thermoplastic materials 3 Apparatus and materials 3.1 Analytical balance, accurate to 0
39、,000 1 g. 3.2 Micrometer, accurate to 0,01 mm. ENISO176:2005IS:671 O5002(E) 2 I SO 5002 All irthgs ersedevr3.3 Thermostatic bath or oven, capable of maintaining the temperature to within 1 C of the test temperature, in the range of 50 C to 150 C. 3.4 Containers, metal cans, of cylindrical form, abou
40、t 100 mm in diameter and 120 mm in height, provided with a non-air-tight cover; a lid with a small vent hole of 3 mm diameter may be suitable. 3.5 Wire cages, constructed from bronze gauze having apertures of approximately 500 m with a diameter of 60 mm and a height of 6 mm, formed by soldering a st
41、rip of the gauze a right angles to the periphery of a disk of the gauze, with a similar but slightly larger cylinder acting as a lid. 3.6 Activated carbon, with a grain-size of about 4 mm to 6 mm, free from powder. The carbon shall be of a well determined type and grade, in order to obtain concordan
42、t results. 1)Before use, the carbon should be sieved and dried to constant mass at 70 C, preferably under vacuum and then stored in an air-tight container. Use fresh material for each test. 4 Test specimens The test specimens shall be in the form of disks 50 mm 1 mm in diameter and 1 mm 0,1 mm in th
43、ickness, cut from a compression-moulded sheet of the appropriate thickness. Refer to the provisions of ISO 293. If the test is carried out for the determination of the characteristics of specific plasticizers, standard compounds of a given composition, as agreed between vendor and purchaser, shall b
44、e used. At least three test specimens shall be tested for each material. NOTE For special purposes, the use of specimens of different shape and thickness might be necessary. However, a comparison of the values obtained is possible only for specimens of the same thickness. Coated fabrics and other su
45、pported plastics films may be tested by this method using specimens cut directly from the sample as received. 5 Conditioning Unless otherwise specified, test specimens shall be conditioned in one of the atmospheres specified in ISO 291. 6 Procedure 6.1 Method A Test specimen in direct contact with a
46、ctivated carbon 6.1.1 After conditioning, weigh each test specimen to the nearest 0,001 g and determine its mean thickness to the nearest 0,01 mm. 6.1.2 Place one specimen on the bottom of a metal container (3.4) and spread about 120 cm 3of activated carbon (3.6) over this specimen. Place two additi
47、onal specimens in the container, each covered by 120 cm 3of carbon. Finally, put the lid on the container. 6.1.3 Only test specimens of the same composition shall be placed in one container, in order to avoid the possibility of plasticizers or other volatile components migrating from one specimen to
48、 another. 1) Suitable brands of activated carbon are available commercially. Detailed information may be obtained from the Secretariat of ISO/TC 61 or from the ISO Central Secretariat. ENISO176:2005IS:671 O5002(E) I SO 5002 All irthgs ersedevr 36.1.4 Place the container in the oven or thermostatic b
49、ath controlled at a temperature of 70 C 1 C. 6.1.5 After 24 h, remove the container from the oven or bath and allow it to cool at room temperature. Remove the specimens from the container, carefully brush them free from any trace of carbon particles and recondition under the same conditions as those to which they were subjected before the original weighing. 6.1.6 Reweigh each specimen to the nearest 0,001 g. 6.2 Method B
