1、BRITISH STANDARD BS EN ISO 307:2007Plastics Polyamides Determination of viscosity numberICS 83.080.20nullnull nullnullnullnullnullnullnull nullnullnullnullnullnullnull nullnullnull nullnullnullnullnullnullnullnullnullnull nullnullnullnullnullnull nullnull nullnullnullnullnullnullnullnullnull nullnul
2、l nullnullnullnullnullnullnullnullnull nullnullnull+A1:2013National forewordThis British Standard is the UK implementation of EN ISO 307:2007+A1:2013. It is identical to ISO 307:2007, incorporating amendment 1:2013. It supersedes BS EN ISO 307:2007 which is withdrawn.The start and finish of text int
3、roduced or altered by amendment is indicated in the text by tags. Tags indicating changes to ISO text carry the number of the ISO amendment. For example, text altered by ISO amendment 1 is indicated by !“.The UK participation in its preparation was entrusted to Technical Committee PRI/82, Thermoplas
4、tic materials.A list of organizations represented on this committee can be obtained on request to its secretary.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 cannot confer
5、immunity from legal obligations.BS EN ISO 307:2007+A1:2013This British Standard waspublished under the authorityof the Standards Policy andStrategy Committeeon 29 June 2007 The British StandardsInstitution 2013. Publishedby BSI Standards Limited2013Amendments/corrigenda issued since publicationDate
6、Comments 30 June 2013 Implementation of ISO amendment 1:2013 with CEN endorsement A1:2013ISBN 978 0 580 76635 0EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 307ICS 83.080.20English VersionPlastics - Polyamides - Determination of viscosity number (ISO307:2007)Plastiques - Polyamides - Dtermin
7、ation de lindice deviscosit (ISO 307:2007)Kunststoffe - Polyamide - Bestimmung der Viskosittszahl(ISO 307:2007)This European Standard was approved by CEN on 14 May 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanSt
8、andard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, Frenc
9、h, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Cze
10、ch Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN
11、 DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 307:2007: E:2007+A1April 2013Foreword This document (EN ISO 307:2007) has
12、been prepared by Technical Committee ISO/TC 61 “Plastics“ in collaboration with Technical Committee CEN/TC 249 “Plastics“, the secretariat ofwhich is held by NBN.This European Standard shall be given the status of a national standard, either by publication ofan identical textor by endorsement, at th
13、e latestbyNovember 2007, and conflicting nationalstandards shall bewithdrawn at the latest by November 2007. This document supersedes EN ISO 307:2003. According to the CEN/CENELEC Internal Regulations, the national standards organizations ofthe following countries are bound to implement this Europea
14、n Standard: Austria, Belgium,Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
15、Endorsement notice The text of ISO 307:2007 has been approved by CEN as EN ISO 307:2007 without anymodifications. This document (EN ISO 307:2007/A1:2013) has been prepared by Technical Committee ISO/TC 61 “Plastics“ in collaboration with Technical Committee CEN/TC 249 “Plastics” the secretariat of w
16、hich is held by NBN. 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 October 2013, and conflicting national standards shall be withdrawn at the latest by October 2013. Attention is drawn to the po
17、ssibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries
18、 are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
19、 Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 307:2007/Amd 1:2013 has been approved by CEN as EN ISO 307:2007/A1:2013 without any modification. Foreword to amendment A1BS EN ISO 307:2007+A1:2013 ISO 307:2007+A1:2
20、013 (E)EN iiiContents PageForeword ivIntroduction v1Scope . 12Normative references. 13Terms and definitions. 24Principle. 35Reagents and materials. 35.1 Solvents and reagents 35.2 Cleaning liquids 46Apparatus 47Preparation of test samples. 57.1 General. 57.2 Samples containing less than 98 % (by mas
21、s) polyamide. 58Calculation of test portion. 69Selection of solvent 610 Procedure 710.1 Cleaning of the viscometer 710.2 Preparation of test solution. 710.3 Measurement of flow times 911 Expression of results. 1012 Repeatability and reproducibility 1013 Relationship between the viscosity number dete
22、rmined in 96 % (by mass) sulfuric acidsolution and the viscosity determined in various solvents. 1114 Test report. 11Annex A (informative) Determination of the concentration of commercial sulfuric acid (95 % to 98 %)and adjustment to 96 %bytitration .13Annex B (informative) Determination of the conc
23、entration of sulfuric acid (95 % to 98 %) andadjustment to 96 % by flow time measurement in a small capillary viscometer. 16Annex C (informative) Determination of the concentration of commercial formic acid and adjustment to 90 % by titration . 18Annex D (informative) Determination of the concentrat
24、ion of commercial formic acid and adjustment to 90 % by density measurement 20Annex E (informative) Relationship between the viscosity number determined in 96 % (by mass) sulfuric acid solution and the viscosity determined in various solvents. 23Bibliography. 33BS EN ISO 307:2007+A1:2013 ISO 307:200
25、7+A1:2013 (E)iv Foreword ISO (the International 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 bodyinterested in a subjec
26、t for which a technical committee has beenestablished 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 closel ywith the International Electrotechnical Commission (IEC)
27、on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standardsadopted by the technical committees a
28、re 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. 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
29、responsible for identifying any or all such patent rights. ISO 307 was prepared by Technical Committee ISO/TC61, Plastics, Subcommittee SC 9, Thermoplastic materials. This fifth edition cancels and replaces the fourth edition (ISO 307:2003), which has been technically revised. BS EN ISO 307:2007+A1:
30、2013 ISO 307:2007+A1:2013 (E)vIntroduction This International Standard specifies a method for the determination of the viscosity number of dilute solutions of polyamides in certain specified solvents. The determination of the viscosity number of a polyamide providesa value that depends on the molecu
31、lar mass of the polymer, but does not strictlycorrelate with the molecularmass.Additives such as flame-retardants and modifiers often interfere with the viscosity measurement and mayhave an increasing effect on the viscos itynumber in one solvent and a decr easing effect in another solvent.The exten
32、t of the effect depends among others on the additive, the quantity of the additive, the presence of other additives and reactions.The viscosity number of a polyamide sample containing additives that interfere with the viscositymeasurement, measured in a specific solvent, represents a specific viscos
33、ity number for the polyamide underinvestigation and the actualmeasurement conditions. The measured viscosity number cannot, in principle, be converted from one solvent to another and is only suitable for intra-product comparison. The viscosity number of pure polyamides or polyamides containing addit
34、ives that do not interfere with theviscosity measurement can be converted from one solvent to another by a general relationship for that type ofpolyamide. Polyamide test samples for the determination of the viscosity number must be completely soluble in thesolvents mentioned. Additives contained in
35、them, like glass and carbon fibres,must be separated f rom thesolution. As it is not possible to distinguish between extractables such as caprolactam, its oligomers and otherextractable additives, these are considered as an essential part of the sample and therefore included in the sample mass.The t
36、est method is applicable for production control and intra-product comparison even if the polyamide contains additives that do interfere with the viscosity measurement. However, it should be realised thatdeviations of the viscosity number can be caused by either the polyamide itself, effects caused b
37、y theadditives present, or a combination of these. The interference of additives with the viscosity determination can be checked by comparing the viscosityresults of dry blend mixtures and regular production samples at several concentrations of the additive underinvestigation and in the solvents con
38、cerned. It should be noted that the other additivespresent also couldinfluence the viscosity result.The repeatabilityand reproducibilityof the test method are strongly influenced bythe correctness of thesolvent concentration, the use of the Hagenbach correction if applicable and the temperature of t
39、he solvent on diluting the sample solution. In this International Standard two specific viscometers are recommended. Furthermore, other types of viscometers listed in ISO 3105 may also be used, provided that the results are demonstrated to be equivalent to those measured with the recommended viscome
40、ters. It is to be expected that in the next revision the use of the other types of viscometers will be excluded. BS EN ISO 307:2007+A1:2013 ISO 307:2007+A1:2013 (E)blank1Plastics Polyamides Determination ofviscositynumber 1 Scope This International Standard specifies a method for the determination o
41、f the viscosity number of dilute solutions of polyamides in certain specified solvents.Polyamide samples must be completely soluble in the solvents mentioned. Additives such as flame-retardantsand modifiers often interfere with the viscosity measurement, having an increasing effect on the viscosityn
42、umber in formic acid and a decreasing effect on the viscosity number in sulfuric acid. The extent of the effectfor polyamide compounds depends on the additive, the quantity of the additive, the presence of otheradditives and the compounding conditions. For pure polyamides orpolyamides containing add
43、itives that do not interfere with the viscosity measurement,the determination of the viscosity number of a polyamide provides a measure of the molecular mass of the polymer. The viscosity number of pure polyamides or polyamides which contain additives that do not interfere with the viscosity measure
44、ment can be converted from one solvent to another. The viscosity number of polyamides containing additives that do interfere with the viscosity measurement isspecific to the solvent used and the material composition. In this case, the measured vis cosity number cannotbe converted from one solvent to
45、 another.The method is applicable to the polyamides designated PA 46, PA 6, PA 66, PA69, PA 610, PA 612, PA11, PA 12, PA 6T/66, PA 6I/6T,PA6T/6I/66, PA 6T/6I, PA 6I/6T/66 and PA MXD6 as defined in ISO1874-1, as well as to copolyamides, compounds of polyamides and other polyamides that are s oluble i
46、n one of thespecified solvents under the specified conditions. The method is not applicable to polyamides produced by anionic polymerization of lactams or produced with cross-linking agents; suchpolyamides are normallyinsoluble in the specified solvents.The viscosity number is determined by the gene
47、ral procedure specified in ISO 1628-1, observing the particularconditions specified in this International Standard. 2 NormativereferencesThe following referenced documents are indispensable for the application of this document. For datedreferences, only the edition cited applies. For undated referen
48、ces, the latest edition of the referenceddocument (including any amendments) applies.ISO 1042, Laboratory glassware One-mark volumetric flasksISO 1628-1, Plastics Determination of the viscosity of polymers in dilute solution using capillaryviscometers Part1: General principlesISO 1874-1, Plastics Po
49、lyamide (PA) moulding and extrusion materials Part1: DesignationISO 3105, Glass capillary kinematic viscometers Specifications and operating instructionsISO 3451-4, Plastics Determination of ash Part 4: PolyamidesBS EN ISO 307:2007+A1:2013 ISO 307:2007+A1:2013 (E)2 ISO 15512, Plastics Determination of water contentASTM D789, Standard testmethods for determination of relative viscosity of polyamide (PA)3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 1628-1 and the following apply.3.1 viscosity number of a
