1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Plastics - Resins in the liquid state or as emulsions or dispersions - Determination of apparent viscosity using a single cylinder type rotational viscometer methodBS EN ISO 2555:2018National forewordThis British Standa
2、rd is the UK implementation of EN ISO 2555:2018. It is identical to ISO 2555:2018. It supersedes BS EN ISO 2555:2000, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee PRI/21, Testing of plastics.A list of organizations represented on this committee can
3、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. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 93748 4ICS 83.080.10Complia
4、nce with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 2555:2018EUROPEAN
5、 STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 2555June 2018ICS 83.080.01 Supersedes EN ISO 2555:1999EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CEN Ref. No. EN ISO 2555:2018: E
6、All rights of exploitation in any form and by any means reserved worldwide for CEN national MembersPlastics - Resins in the liquid state or as emulsions or dispersions - Determination of apparent viscosity using a single cylinder type rotational viscometer method (ISO 2555:2018)Plastiques - Rsines l
7、tat liquide ou en mulsions ou dispersions - Dtermination de la viscosit apparente par la mthode du viscomtre rotatif de type un cylindre (ISO 2555:2018)Kunststoffe - Harze im flssigen Zustand, als Emulsionen oder Dispersionen - Bestimmung der scheinbaren Viskositt mit einem Rotationsviskosimeter mit
8、 Einzelzylinder (ISO 2555:2018)This European Standard was approved by CEN on 26 May 2018.CEN members 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 lis
9、ts and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre 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
10、the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugo
11、slav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.English VersionEN ISO 2555:2018 (E)European f
12、orewordThis document (EN ISO 2555:2018) 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 NBN.This European Standard shall be given the status of a national standard, either by publication
13、 of an identical text or by endorsement, at the latest by December 2018, and conflicting national standards shall be withdrawn at the latest by December 2018.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held re
14、sponsible for identifying any or all such patent rights.This document supersedes EN ISO 2555:1999.According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyp
15、rus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and t
16、he United Kingdom.Endorsement noticeThe text of ISO 2555:2018 has been approved by CEN as EN ISO 2555:2018 without any modification.iiBS EN ISO 2555:2018ISO 2555:2018Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principle 14.1 General . 14.2 Operating princ
17、iple . 24.3 Brief description 25 Apparatus . 35.1 Single cylinder type rotational viscometer . 35.2 Thermostatic liquid bath 75.3 Additional apparatus . 76 Choice of spindle and rotational speed . 77 Procedure. 88 Expression of results .109 Test report 11Annex A (informative) Choice of test conditio
18、ns for general application to resins in the liquid state, emulsions and dispersions .12Annex B (normative) Spindle and guard stirrup 14Bibliography .17 ISO 2018 All rights reserved iiiContents PageBS EN ISO 2555:2018ISO 2555:2018ForewordISO (the International Organization for Standardization) is a w
19、orldwide 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 established has the right to be represented
20、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. The procedures used to develop thi
21、s document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Di
22、rectives, Part 2 (see www.iso.org/directives).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. Details of any patent rights identified during the deve
23、lopment of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement. For an explanation on the voluntary natu
24、re of standards, the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.This documen
25、t was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 5, Physical-chemical properties.This third edition cancels and replaces the second edition (ISO 2555:1989), which has been technically revised. The main changes compared to the previous edition are as follows:a) the name of t
26、he equipment has been changed to “single cylinder type rotational viscometer” and the method of determination of viscosity is described with more general terms to avoid reference to specific brand names;b) the commercially available main models and spindles have been summarized;c) digital type visco
27、meter has been added;d) the accuracy of test method has been added;e) the calibration method has been added.iv ISO 2018 All rights reservedBS EN ISO 2555:2018ISO 2555:2018IntroductionA rotational viscometer is composed of a spindle, a torque measuring device and a spring. There are three types of ro
28、tational viscometers with regard to difference of the spindle:a) single cylinder type (used in this document, i.e. ISO 2555);b) coaxial cylinder type (used in ISO 32192);c) cone-plate type (used in ISO 32192).Single cylinder type rotational viscometers measure viscosity under non-constant shear rate
29、. Coaxial cylinder type and cone-plate type instruments measure viscosity under constant shear rate.When using a single cylinder type instrument, the measured viscosity is relative to measuring conditions. Conditions are therefore intended to be specified for viscosity measurements.For Newtonian flu
30、ids, the viscosity value remains the same even if different viscosity measuring methods from this document and ISO 3219 are used.With non-Newtonian fluids the measured viscosity changes depending on shear rate. The viscosity determined using different measuring methods such as methods from this docu
31、ment and ISO 3219 therefore may differ from each other, depending on shear rates used during measurements.The Brookfield method has contributed a lot to determination of liquid viscosity. With its simple measuring low-cost equipment, the principles underlying the Brookfield technique still remain an
32、 important element in determination of viscosity of liquids.This document is largely based on the Brookfield method established in 1989. However, some of the instruments mentioned in the previous edition of this document have long been discontinued. Moreover, although analogue (or the so-called “dia
33、l”) type was the predominant viscometer type at that time, the use has now shifted to digital viscometers in the recent years, increasing the need for this document to be revised.The terms and standards introduced in this new edition are based on ISO 16521.Currently, digital viscometer has become th
34、e mainstream. However, analogue (or dial) viscometer is still used and cannot be removed from the method. This document allows the use of both analogue (or dial) viscometer and digital viscometer. ISO 2018 All rights reserved vBS EN ISO 2555:2018This page deliberately left blankPlastics - Resins in
35、the liquid state or as emulsions or dispersions - Determination of apparent viscosity using a single cylinder type rotational viscometer method1 ScopeThis document specifies a method of determining apparent viscosity of resins in a liquid state using a single cylinder type rotational viscometer.The
36、method can be used for viscosity measurements in the range from 0,02 Pa s to 60 000 Pa s.This document is applicable to both Newtonian and non-Newtonian liquids and the measured apparent viscosity depends on the velocity gradient to which the liquids are subjected during the measurement.2 Normative
37、referencesThere are no normative references in this document.3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses: IEC Electropedia: available at http:/w
38、ww.electropedia.org/ ISO Online browsing platform: available at https:/www.iso.org/obp3.1single cylinder type rotational viscometerapparatus that determines viscosity by measuring the torque acting on a cylinder or a disc surface rotating in laminar flow condition at constant angular velocity3.2spin
39、dlerotational symmetric object in the form of a cylinder or disc connected to a vertically rotating shaft3.3apparent viscosityviscosity of liquids/fluids determined from the measured torque using predetermined calibration tableNote 1 to entry: For non-Newtonian fluids the apparent viscosity depends
40、on the shear rate. With these types of viscometer, the velocity gradient is not the same for every point of the spindle. Thus, for a non-Newtonian fluid, the result is not strictly the true “viscosity at a known velocity gradient” and therefore is conventionally called the apparent viscosity.4 Princ
41、iple4.1 GeneralA rotational symmetric spindle is driven at constant rotational speed in the liquid being measured.INTERNATIONAL STANDARD ISO 2555:2018 ISO 2018 All rights reserved 1BS EN ISO 2555:2018ISO 2555:2018The resistance exerted by the fluid on the spindle, which depends on the viscosity of t
42、he liquid, creates a torque which is measured by a suitable device.The apparent viscosity measured using a single cylinder type rotational viscometer is obtained by multiplying the torque readout with a coefficient which depends on the rotational speed and characteristics of the spindle. With digita
43、l viscometers, viscosity is displayed by setting a certain rotational speed and entering the correct spindle number.This method applies to Newtonian and non-Newtonian matter.4.2 Operating principleWith analogue viscometer, a synchronous motor rotates a vertical shaft through a gear-box. This vertica
44、l shaft drives, through a spiral spring, a second lower shaft, forming an extension of the first. A removable spindle is attached to this second shaft and is immersed in the liquid under test. These two shafts rotate at the same frequency but, when the spindle is immersed there is an angular deviati
45、on between them which is a function of the resistance of the liquid to the rotation of the spindle, i.e. the liquid viscosity. Because of the difficulty of taking readings while the needle and dial are both rotating, a dial-needle locking system allows the reading to be taken after the motor has sto
46、pped.With digital viscometers, an angle deviation between a vertical shaft and a second lower shaft is automatically read using the device for angle deviation measurement. Figure 1 shows a schematic drawing of the operating principle of a digital viscometer.4.3 Brief descriptionAnalogue viscometer b
47、ody is equipped with an electric switch, synchronous motor, gear-box with its rotational speed change button, spiral spring, dial and needle, and dial-needle locking system.Digital viscometer body is equipped with an electric switch, synchronous motor, the input device of the rotational speed, the i
48、nput of the spindle, spiral spring, spindle, CPU, display and measurement of the angular deviation system.2 ISO 2018 All rights reservedBS EN ISO 2555:2018ISO 2555:2018Key1 viscosity (display)2 motor3 CPU4 input device of the rotational speed and spindle number5 device of angle deviation measurement
49、, between the spindle and the motor6 spring7 first vertical shaft8 second lower shaft9 temperature measuring device10 guard stirrup11 spindle12 liquid13 beaker electrical signals or inputFigure 1 Schematic drawing of the operating principle of a digital viscometer5 Apparatus5.1 Single cylinder type rotational viscometerDepending on the viscosity of liquid and the desired precision, viscometer models L, R, H(A) or H(B) are chosen for measurement of sample viscosity. These viscometer models are categorized, based on the torque range. R i
