EN ISO 307:2007
(Main)Plastics - Polyamides - Determination of viscosity number (ISO 307:2007)
Plastics - Polyamides - Determination of viscosity number (ISO 307:2007)
ISO 307:2007 specifies a method for the determination of the viscosity number of dilute solutions of polyamides in certain specified solvents.
For pure polyamides or polyamides containing additives 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 measurement can be converted from one solvent to another.
The viscosity number of polyamides containing additives that do interfere with the viscosity measurement is specific to the solvent used and the material composition. In this case, the measured viscosity number cannot be converted from one solvent to another.
The method is applicable to the polyamides designated PA 46, PA 6, PA 66, PA 69, PA 610, PA 612, PA 11, PA 12, PA 6T/66, PA 6I/6T, PA 6T/6I/66, PA 6T/6I, PA 6I/6T/66 and PA MXD6, as well as to copolyamides, compounds of polyamides and other polyamides that are soluble in one of the specified solvents under the specified conditions.
The method is not applicable to polyamides produced by anionic polymerization of lactams or produced with cross-linking agents; such polyamides are normally insoluble in the specified solvents.
Kunststoffe - Polyamide - Bestimmung der Viskositätszahl (ISO 307:2007)
Diese Internationale Norm legt ein Verfahren zur Bestimmung der Viskositätszahl von verdünnten Polyamid¬lösungen in bestimmten, festgelegten Lösemitteln fest.
Die Polyamidproben müssen in den aufgeführten Lösemitteln vollständig löslich sein. Zusatzstoffe, wie z. B. Flammschutzmittel und Modifikatoren, wirken sich oft störend auf die Viskositätsmessung aus, wobei sie in Ameisensäure zu einem größeren und in Schwefelsäure zu einem kleineren Wert der Viskositätszahl führen. Der Grad der Auswirkung hängt bei Polyamid Compounds von dem Zusatzstoff, der Menge an Zusatzstoff, dem Vorliegen weiterer Zusatzstoffe und den Compoundierbedingungen (Aufbereitungsbedingungen) ab.
Bei reinen Polyamiden oder von Polyamiden mit Zusatzstoffen, die die Viskositätsmessung nicht stören, ergibt die Bestimmung der Viskositätszahl eines Polyamids ein Maß für die Molekülmasse des Polymers. Die Viskositätszahl von reinen Polyamiden oder von Polyamiden mit Zusatzstoffen, die die Viskositätsmessung nicht stören, kann von einem Lösemittel auf ein anderes umgewandelt werden.
Die Viskositätszahl von Polyamiden mit Zusatzstoffen, die sich störend auf die Viskositätsmessung auswirken, ist spezifisch für das verwendete Lösemittel und die Werkstoffzusammensetzung. In diesem Fall kann die gemessene Viskositätszahl nicht von einem Lösemittel auf ein anderes umgewandelt werden.
Das Verfahren ist auf Polyamide mit den Bezeichnungen PA 46, PA 6, PA 66, PA 69, PA 610, PA 612, PA 11, PA 12, PA 6T/66, PA 6I/6T, PA 6T/6I/66, PA 6T/6I, PA 6I/6T/66 und PA MXD6, wie in ISO 1847 1 definiert, und Copolyamide, Polyamid Compounds und sonstige Polyamide anwendbar, die unter den festgelegten Bedingungen in einem der festgelegten Lösemittel löslich sind.
Plastiques - Polyamides - Détermination de l'indice de viscosité (ISO 307:2007)
L'ISO 307:2007 spécifie une méthode pour la détermination de l'indice de viscosité de solutions diluées de polyamides dans certains solvants spécifiés.
Pour les polyamides purs ou les polyamides contenant des additifs qui n'affectent pas le mesurage de la viscosité, la détermination de l'indice de viscosité d'un polyamide fournit une mesure de la masse moléculaire du polymère. L'indice de viscosité des polyamides purs ou des polyamides qui contiennent des additifs qui n'affectent pas le mesurage de la viscosité peut être converti d'un solvant à un autre.
L'indice de viscosité des polyamides contenant des additifs qui affectent le mesurage de la viscosité est spécifique au solvant utilisé et à la composition du matériau. Dans ce cas, l'indice de viscosité mesuré ne peut pas être converti d'un solvant à l'autre.
La méthode est applicable aux polyamides désignés PA 46, PA 6, PA 66, PA 69, PA 610, PA 612, PA 11, PA 12, PA 6T/66, PA 6I/6T, PA 6T/6I/66, PA 6T/6I, PA 6I/6T/66 et PA MXD6, ainsi qu'aux copolyamides, aux composés polyamides et aux autres polyamides solubles dans l'un des solvants spécifiés dans les conditions spécifiées.
La méthode n'est pas applicable aux polyamides obtenus par polymérisation anionique des lactames ou produits avec des agents de réticulation; de tels polyamides étant normalement insolubles dans les solvants spécifiés.
Polimerni materiali - Poliamidi - Določanje števila viskoznosti (ISO 307:2007)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2007
1DGRPHãþD
SIST EN ISO 307:2003
3ROLPHUQLPDWHULDOL3ROLDPLGL'RORþDQMHãWHYLODYLVNR]QRVWL ,62
Plastics - Polyamides - Determination of viscosity number (ISO 307:2007)
Kunststoffe - Polyamide - Bestimmung der Viskositätszahl (ISO 307:2007)
Plastiques - Polyamides - Détermination de l'indice de viscosité (ISO 307:2007)
Ta slovenski standard je istoveten z: EN ISO 307:2007
ICS:
83.080.20 Plastomeri Thermoplastic materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD
EN ISO 307
NORME EUROPÉENNE
EUROPÄISCHE NORM
May 2007
ICS 83.080.20 Supersedes EN ISO 307:2003
English Version
Plastics - Polyamides - Determination of viscosity number (ISO
307:2007)
Plastiques - Polyamides - Détermination de l'indice de Kunststoffe - Polyamide - Bestimmung der Viskositätszahl
viscosité (ISO 307:2007) (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 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 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 translation
under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the
official 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.
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EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2007 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 307:2007: E
worldwide for CEN national Members.
Foreword
This document (EN ISO 307:2007) 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 November 2007, and conflicting national
standards shall be withdrawn at the latest by November 2007.
This document supersedes EN ISO 307:2003.
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 United
Kingdom.
Endorsement notice
The text of ISO 307:2007 has been approved by CEN as EN ISO 307:2007 without any
modifications.
INTERNATIONAL ISO
STANDARD 307
Fifth edition
2007-05-15
Plastics — Polyamides — Determination
of viscosity number
Plastiques — Polyamides — Détermination de l'indice de viscosité
Reference number
ISO 307:2007(E)
©
ISO 2007
ISO 307:2007(E)
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ii © ISO 2007 – All rights reserved
ISO 307:2007(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions. 2
4 Principle. 3
5 Reagents and materials . 3
5.1 Solvents and reagents. 3
5.2 Cleaning liquids . 4
6 Apparatus . 4
7 Preparation of test samples. 5
7.1 General. 5
7.2 Samples containing less than 98 % (by mass) polyamide . 5
8 Calculation of test portion . 6
9 Selection of solvent. 6
10 Procedure . 7
10.1 Cleaning of the viscometer. 7
10.2 Preparation of test solution . 7
10.3 Measurement of flow times. 9
11 Expression of results . 10
12 Repeatability and reproducibility. 10
13 Relationship between the viscosity number determined in 96 % (by mass) sulfuric acid
solution and the viscosity determined in various solvents . 11
14 Test report . 11
Annex A (informative) Determination of the concentration of commercial sulfuric acid (95 % to
98 %) and adjustment to 96 % by titration .13
Annex B (informative) Determination of the concentration of sulfuric acid (95 % to 98 %) and
adjustment to 96 % by flow time measurement in a small capillary viscometer . 16
Annex C (informative) Determination of the concentration of commercial formic acid and
adjustment to 90 % by titration . 18
Annex D (informative) Determination of the concentration of commercial formic acid and
adjustment to 90 % by density measurement. 20
Annex E (informative) Relationship between the viscosity number determined in 96 % (by mass)
sulfuric acid solution and the viscosity determined in various solvents. 23
Bibliography . 33
ISO 307:2007(E)
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 307 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 9, Thermoplastic
materials.
This fifth edition cancels and replaces the fourth edition (ISO 307:2003), which has been technically revised.
iv © ISO 2007 – All rights reserved
ISO 307:2007(E)
Introduction
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 provides
a value that depends on the molecular mass of the polymer, but does not strictly correlate with the molecular
mass.
Additives such as flame-retardants and modifiers often interfere with the viscosity measurement and may
have an increasing effect on the viscosity number in one solvent and a decreasing effect in another solvent.
The extent 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 viscosity
measurement, measured in a specific solvent, represents a specific viscosity number for the polyamide under
investigation and the actual measurement 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 additives that do not interfere with the
viscosity measurement can be converted from one solvent to another by a general relationship for that type of
polyamide.
Polyamide test samples for the determination of the viscosity number must be completely soluble in the
solvents mentioned. Additives contained in them, like glass and carbon fibres, must be separated from the
solution.
As it is not possible to distinguish between extractables such as caprolactam, its oligomers and other
extractable additives, these are considered as an essential part of the sample and therefore included in the
sample mass.
The test 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 that
deviations of the viscosity number can be caused by either the polyamide itself, effects caused by the
additives present, or a combination of these.
The interference of additives with the viscosity determination can be checked by comparing the viscosity
results of dry blend mixtures and regular production samples at several concentrations of the additive under
investigation and in the solvents concerned. It should be noted that the other additives present also could
influence the viscosity result.
The repeatability and reproducibility of the test method are strongly influenced by the correctness of the
solvent concentration, the use of the Hagenbach correction if applicable and the temperature of the solvent on
diluting the sample solution.
In this International Standard two specific viscometers are recommended. Furthermore, other types of
viscomete
...
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