SIST EN ISO 1628-1:2009
(Main)Plastics - Determination of the viscosity of polymers in dilute solution using capillary viscometers - Part 1: General principles (ISO 1628-1:2009)
Plastics - Determination of the viscosity of polymers in dilute solution using capillary viscometers - Part 1: General principles (ISO 1628-1:2009)
This part of ISO 1628 defines the general conditions for the determination of the reduced viscosity, intrinsic viscosity and K-value of organic polymers in dilute solution. It defines the standard parameters that are applied to viscosity measurement, and can be used to develop standards for measuring the viscosities in solution of individual types of polymer. It can also be used to measure and report the viscosities of polymers in solution for which no separate standards exist.
Kunststoffe - Bestimmung der Viskosität von Polymeren in verdünnter Lösung durch ein Kapillarviskosimeter - Teil 1: Allgemeine Grundlagen (ISO 1628-1:2009)
Dieser Teil von ISO 1628 legt die allgemeinen Grundlagen für die Bestimmung der reduzierten Viskosität, der Intrinsic Viskosität und des K Wertes von organischen Polymeren in verdünnter Lösung fest. Er definiert die bei Viskositätsmessungen angewendeten genormten Parameter, und er kann für die Erarbeitung von Normen zur Messung der Viskositäten bestimmter Polymere in verdünnter Lösung herangezogen werden. Dieser Teil der Norm kann auch zur Messung der Viskositäten von Polymeren in verdünnter Lösung, für die es keine spezielle Norm gibt, angewendet werden.
Plastiques - Détermination de la viscosité des polymères en solution diluée à l'aide de viscosimètres à capillaires - Partie 1: Principes généraux (ISO 1628-1:2009)
L'ISO 1628-1:2009 définit les conditions générales nécessaires pour déterminer la viscosité réduite, la viscosité intrinsèque et la valeur K des polymères organiques en solution diluée. Elle définit les paramètres normalisés qui sont appliqués au mesurage de la viscosité et qui peuvent être utilisés pour élaborer des normes concernant le mesurage de la viscosité de différents types de polymères en solution. Elle peut également être utilisée pour mesurer et exprimer les viscosités des polymères en solution qui ne font l'objet d'aucune norme distincte.
Polimerni materiali - Določanje viskoznosti polimerov v razredčenih raztopinah s kapilarnimi viskozimetri - 1. del: Splošna načela (ISO 1628-1:2009)
Ta del standarda ISO 1628 določa splošne pogoje za določanje zmanjšane viskoznosti, lastne viskoznosti in vrednosti K polimerov v razredčenih raztopinah. Določa standardne parametre, ki se uporabljajo pri merjenju viskoznosti, in se lahko uporablja za pripravo standardov za merjenje viskoznosti v raztopinah posameznih vrst polimerov. Uporabi se lahko tudi za merjenje in sporočanje viskoznosti polimerov v raztopini, za katero niso na voljo posebni standardi.
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kunststoffe - Bestimmung der Viskosität von Polymeren in verdünnter Lösung durch ein Kapillarviskosimeter - Teil 1: Allgemeine Grundlagen (ISO 1628-1:2009)Plastiques - Détermination de la viscosité des polymères en solution diluée à l'aide de viscosimètres à capillaires - Partie 1: Principes généraux (ISO 1628-1:2009)Plastics - Determination of the viscosity of polymers in dilute solution using capillary viscometers - Part 1: General principles (ISO 1628-1:2009)83.080.01Polimerni materiali na splošnoPlastics in generalICS:Ta slovenski standard je istoveten z:EN ISO 1628-1:2009SIST EN ISO 1628-1:2009en,fr,de01-maj-2009SIST EN ISO 1628-1:2009SLOVENSKI
STANDARDSIST EN ISO 1628-1:20001DGRPHãþD
SIST EN ISO 1628-1:2009
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN ISO 1628-1February 2009ICS 83.080.01Supersedes EN ISO 1628-1:1998
English VersionPlastics - Determination of the viscosity of polymers in dilutesolution using capillary viscometers - Part 1: General principles(ISO 1628-1:2009)Plastiques - Détermination de la viscosité des polymèresen solution diluée à l'aide de viscosimètres à capillaires -Partie 1: Principes généraux (ISO 1628-1:2009)Kunststoffe - Bestimmung der Viskosität von Polymeren inverdünnter Lösung durch ein Kapillarviskosimeter - Teil 1:Allgemeine Grundlagen (ISO 1628-1:2009)This European Standard was approved by CEN on 12 January 2009.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard 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, French, 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, 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.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre:
Avenue Marnix 17,
B-1000 Brussels© 2009 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 1628-1:2009: ESIST EN ISO 1628-1:2009
EN ISO 1628-1:2009 (E) 2 Contents Page Foreword .3 SIST EN ISO 1628-1:2009
EN ISO 1628-1:2009 (E) 3 Foreword This document (EN ISO 1628-1:2009) 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 of an identical text or by endorsement, at the latest by August 2009, and conflicting national standards shall be withdrawn at the latest by August 2009. Attention is drawn to the possibility 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. This document supersedes EN ISO 1628-1:1998. 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, 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 the United Kingdom. Endorsement notice The text of ISO 1628-1:2009 has been approved by CEN as a EN ISO 1628-1:2009 without any modification.
SIST EN ISO 1628-1:2009
SIST EN ISO 1628-1:2009
Reference numberISO 1628-1:2009(E)© ISO 2009
INTERNATIONAL STANDARD ISO1628-1Third edition2009-02-01Plastics — Determination of the viscosity of polymers in dilute solution using capillary viscometers — Part 1: General principles Plastiques — Détermination de la viscosité des polymères en solution diluée à l'aide de viscosimètres à capillaires —
Partie 1: Principes généraux
SIST EN ISO 1628-1:2009
ISO 1628-1:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The ISO Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below.
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SIST EN ISO 1628-1:2009
ISO 1628-1:2009(E) © ISO 2009 – All rights reserved iiiContents Page Foreword.iv 1 Scope.1 2 Normative references.1 3 Definitions.1 4 Principle.5 5 Apparatus.5 6 Solutions.8 7 Temperature of measurement.9 8 Procedure.9 9 Expression of results.10 10 Test report.11 Annex A (normative)
Cleaning of apparatus.12 Annex B (normative)
Notes on sources of error.13 Bibliography.16
SIST EN ISO 1628-1:2009
ISO 1628-1:2009(E) iv © ISO 2009 – All rights reserved 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 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-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 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 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 responsible for identifying any or all such patent rights. ISO 1628-1 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 1628-1:1998), of which it constitutes a minor revision intended primarily to correct an error in Subclause 9.1, paragraph 4 (starting: “The intrinsic viscosity shall be calculated from”), where, in line 2, “intrinsic-viscosity values” has been replaced by “inherent-viscosity” values. ISO 1628 consists of the following parts, under the general title Plastics — Determination of the viscosity of polymers in dilute solution using capillary viscometers: ⎯ Part 1: General principles ⎯ Part 2: Poly(vinyl chloride) resins ⎯ Part 3: Polyethylenes and polypropylenes ⎯ Part 4: Polycarbonate (PC) moulding and extrusion materials ⎯ Part 5: Thermoplastic polyester (TP) homopolymers and copolymers ⎯ Part 6: Methyl methacrylate polymers
SIST EN ISO 1628-1:2009
INTERNATIONAL STANDARD ISO 1628-1:2009(E) © ISO 2009 – All rights reserved 1Plastics — Determination of the viscosity of polymers in dilute solution using capillary viscometers — Part 1: General principles 1 Scope This part of ISO 1628 defines the general conditions for the determination of the reduced viscosity, intrinsic viscosity and K-value of organic polymers in dilute solution. It defines the standard parameters that are applied to viscosity measurement, and can be used to develop standards for measuring the viscosities in solution of individual types of polymer. It can also be used to measure and report the viscosities of polymers in solution for which no separate standards exist. 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 references, the latest edition of the referenced document (including any amendments) applies. ISO 3105:1994, Glass capillary kinematic viscometers — Specifications and operating instructions ISO 3205, Preferred test temperatures ISO 80000-1, Quantities and units — Part 1: General1) ISO 80000-4, Quantities and units — Part 4: Mechanics 3 Definitions 3.1 Dimensions and units The dimensions of properties defined in this part of ISO 1628 are expressed in terms of L for length, M for mass and T for time in accordance with ISO 80000-1, while the units appropriate to the properties are given in ISO 80000-1 and ISO 80000-4. 3.2 Definitions applicable to any liquid 3.2.1 viscosity viscosity of a fluid sheared between two parallel plates, one of which moves relative to the other in uniform rectilinear motion in its own plane, defined by the Newton equation
1) To be published. (Revision of ISO 31-0:1992) SIST EN ISO 1628-1:2009
ISO 1628-1:2009(E) 2 © ISO 2009 – All rights reserved τηγ= (1) where t is the shear stress; η is the viscosity; γ is the velocity gradient or rate of shear, given by ddzV where V is the velocity of one plane relative to the other and z the coordinate perpendicular to the two planes NOTE 1 The dimensions of viscosity are ML-1T-1. NOTE 2 The units of viscosity are Pa.s. NOTE 3 For practical use, the sub-multiple 10-3 Pa.s is more convenient. NOTE 4 Viscosity is usually taken to mean “Newtonian viscosity”, in which case the ratio of shearing stress to velocity gradient is constant. In non-Newtonian behaviour, which is the usual case with high-polymer solutions, the ratio varies with the shear rate. Such ratios are often called “apparent viscosities” at the corresponding shear rate. 3.2.2 viscosity/density ratio kinematic viscosity v ratio defined by the equation vηρ= (2) where r is the density of the fluid at the temperature at which the viscosity is measured NOTE 1 The dimensions of kinematic viscosity are L2T-1. NOTE 2 The units of kinematic viscosity are m2.s-1. NOTE 3 For practical use, the sub-multiple 10-6 m2.s-1, i.e. mm2.s-1, is more convenient. 3.3 Definitions applicable to polymer solutions 3.3.1 relative viscosity hr ratio of the viscosity of the polymer solution (of stated concentration) η and the viscosity of the pure solvent η0, at the same temperature: r0ηηη= (3) NOTE 1 Also known as viscosity ratio. NOTE 2 The ratio has no dimensions. SIST EN ISO 1628-1:2009
ISO 1628-1:2009(E) © ISO 2009 – All rights reserved 33.3.2 relative viscosity increment viscosity ratio minus one: 0001ηηηηη⎛⎞−−=⎜⎟⎝⎠ (4) NOTE 1 Also known as viscosity ratio increment and specific viscosity. NOTE 2 The increment has no dimensions. 3.3.3 reduced viscosity I ratio of the viscosity ratio increment to the polymer concentration c in the solution: 00cηηΙη−= (5) NOTE 1 Also known as viscosity number. NOTE 2 The dimensions of reduced viscosity are L3M-1. NOTE 3 The units of reduced viscosity are m3/kg. NOTE 4 For practical use, the sub-multiple 10-3 m3/kg, i.e. cm3/g, is more convenient and the commonly quoted numerical values for reduced viscosity (viscosity number) use these practical units. NOTE 5 The reduced viscosity is usually determined at low concentration (less than 5 kg/m3, i.e. 0,005 g/cm3), except in the case of polymers of low molar mass, for which higher concentrations may be necessary. 3.3.4 inherent viscosity ratio of the natural logarithm of the viscosity ratio to the polymer concentration in the solution: 0lncηη⎛⎞⎜⎟⎝⎠ (6) NOTE 1 Also known as logarithmic viscosity number. NOTE 2 The dimensions and units are the same as those given in 3.3.3. NOTE 3 The inherent viscosity is usually determined at low concentration (less than 5 kg/m3, i.e. 0,005 g/cm3), except in the case of polymers of low molar mass, for which higher concentrations may be necessary. SIST EN ISO 1628-1:2009
ISO 1628-1:2009(E) 4 © ISO 2009 – All rights reserved 3.3.5 intrinsic viscosity [h] limiting value of the reduced viscosity or of the inherent viscosity at infinite dilution: 000lim0lnlim 0ccccηηηηηηη⎛⎞−=⎡⎤⎜⎟⎣⎦→⎝⎠⎛⎞⎜⎟⎝⎠=⎡⎤⎣⎦→ (7) NOTE 1 Also known as limiting viscosity number. NOTE 2 The dimensions and units are the same as those given in 3.3.3. NOTE 3 The effect of the shear rate on the functions defined in 3.3.1 to 3.3.5 has been neglected, since this effect is usually negligible for values of the reduced viscosity, inherent viscosity and intrinsic viscosity less than 0,5 m3/kg, i.e. 500 cm3/g. Strictly speaking, all these functions should be defined at the limiting (preferably infinitely small) value of the shear rate. 3.3.6 K-value constant, independent of the concentration of the polymer solution and peculiar to the polymer sample, which is a measure of the average degree of polymerization: K-value = 1 000k (8) NOTE 1 According to H. Fikentscher[2], k is calculated as follows: 2r75lg1001150kkckcη=++⎛⎞⎜⎟⎜⎟⎝⎠ and therefore rrr21,5lg1121,5lg1,5lg150300ckcηηη−++++=+⎛⎞⎜⎟⎝⎠ (9) where r0ηηη= = the viscosity ratio (see 3.3.1); c is the concentration, in 103 kg/m3, i.e. g/cm3. NOTE 2 A limiting viscosity number [η]k can be calculated from k: []()2230,375kkkη=+ SIST EN ISO 1628-1:2009
ISO 1628-1:2009(E) © ISO 2009 – All rights reserved 54 Principle The data needed for the evaluation of the functions defined in 3.3 are obtained by means of a capillary-tube viscometer. The efflux times of a given volume of solvent t0 and of solution t are measured at fixed temperature and atmospheric-pressure conditions in the same viscometer. The efflux time of a liquid is related to its viscosity by the Poiseuille-Hagenbach-Couette equation: 2AvCttηρ⎛⎞==−⎜⎟⎝⎠ (10) where v is the viscosity/density ratio (see 3.2.2); C is a constant of the viscometer; A is a parameter of the kinetic-energy correction; ρ is the density of the liquid; t is the efflux time. For the purposes of this part of ISO 1628, the kinetic energy correction 2At⎛⎞⎜⎟⎝⎠ shall be regarded as negligible when it is less than 3 % of the viscosity of the solvent. Hence Equation (10) can be reduced to vCtηρ== (11) Moreover, if the solution concentrations are limited so that the solvent density r0 and that of the solution r differ by less than 0,5 %, the viscosity ratio 0ηη=will=be=given=by=the=s→-′alled=“efflu•=time=±ati→”=0tt. The need for these constraints, and the consequences of not observing them, is developed in Annex B. 5 Apparatus 5.1 Capillary viscometer, of the suspended-level Ubbelohde type. The use of a viscometer having the dimensions given in Figure 1 or 2 is strongly recommended. Furthermore, it is strongly recommended that the size of the viscometer be chosen from among those listed in Table 1. The choice is determined by the viscosity/density ratio of the solvent at the temperature of the measurement, as indicated in Table 1. The next-smaller viscometer can also be used. Other types of viscometer listed in ISO 3105 can be used, provided they give results equivalent to those given by the particular size of Ubbelohde viscometer chosen on the basis of the criteria specified in the preceding paragraph. In cases of dispute, an Ubbelohde viscometer shall be used. With automated apparatus, fitted with special timing devices, it may be possible to obtain equivalent results with larger sizes of capillary than those listed for the appropriate solvent viscosity/density ratio in Table 1. 5.2 Viscometer holder, suitable to hold the viscometer firmly in the thermostatic bath (5.3) in the vertical position. SIST EN ISO 1628-1:2009
ISO 1628-1:2009(E) 6 © ISO 2009 – All rights reserved Dimensions in millimetres
Graduation marks:
E and F Filling marks:
G and H a Internal diameter. Figure 1 — Ubbelohde viscometer 5.3 Thermostatic bath, holding a transparent liquid or vapour and of such depth that, during the measurement, no portion of the test liquid will be less than 20 mm below the surface of the bath medium or less than 20 mm above the bottom of the bath. The temperature control shall be such that, within the range 25 °C to 100 °C, the temperature of the bath does not vary from the specified temperature by more than 0,05 °C over the length of the viscometer, or between the viscometers if several determinations are carried out simultaneously. At temperatures higher than 100 °C, the tolerance shall be ± 0,2 °C. SIST EN ISO 1628-1:2009
ISO 1628-1:2009(E) © ISO 2009 – All rights reserved 7Dimensions in millimetres
Graduation marks:
E and F Filling marks:
G and H a Internal diameter. Figure 2 — DIN Ubbelohde viscometer 5.4 Temperature-measuring device. A liquid-in-glass “t
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