ISO 6188:1986

Plastics — Poly(alkylene terephthalate) granules — Determination of water content

Plastiques — Poly(alkylène téréphtalate) en granules — Détermination de la teneur en eau

Polimerni materiali - Polialkilentereftalat-granulat - Določanje vsebnosti vode

General Information

• Status: Withdrawn
• Publication Date: 13-Aug-1986
• Withdrawal Date: 13-Aug-1986
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: ISO/TC 61/SC 9 - Thermoplastic materials
• Drafting Committee: ISO/TC 61/SC 9/WG 17 - Thermoplastic polyesters
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 22-Jul-1999
• Ref Project: SIST ISO 6188:1996 - Plastics -- Poly(alkylene terephthalate) granules -- Determination of water content

Relations

• Revised: ISO 15512:1999 - Plastics — Determination of water content
• Effective Date: 15-Apr-2008
• Revises: ISO 6188:1980 - Plastics — Poly(ethylene terephthalate) granules — Determination of water content
• Effective Date: 15-Apr-2008

Standards Content (Sample)

International Standard
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MEW&YHAPO~HAR OPTAHMSALWR l-l0 CTAH~APTM3ALWlWRGANlSATlON INTERNATIONALE DE NORMALISATION
Plastics - Poly(alkylene terephthalate) granules -
Determination of water content
Hastiques - Poly(aikyl&ne t&hphtalate) en granules - D&termination de la teneur en eau
Second edition - 198648-01
Ref. No. IS0 6188-1986 (E)
UDC 678.742.2 ’524-492.3 : 543.812
chemical analysis, determination of content, water, test equipment.
Descriptors’ : plastics, polyalkylene terephthalate, granular materials,
Price based on 3 pages

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Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of
national standards bodies (IS0 member bodies). The work of preparing International
Standards is normally carried out through IS0 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, govern-
mental and non-governmental, in liaison with ISO, also take part in the work.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the IS0 Council. They are approved in accordance with IS0 procedures requiring at
least 75 % approval by the member bodies voting.
International Standard IS0 6188 was prepared by Technical Committee ISO/TC 61,
plastics.
IS0 6188 was first published in 1980. This second edition cancels and replaces the first
edition (IS0 6188~1980), of which it constitutes a minor revision.
Users should note that all International Standards undergo revision from time to time
and that any reference made herein to any other International Standard implies its
latest edition, unless otherwise stated.
0 International Organization for Standardization, 1986 0
Printed in Switzerland

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IS0 6188-1986 (E)
INTERNATIONAL STANDARD
Plastics - Poly(alkylene terephthalate) granules -
Determination of water content
1 Scope and field of application 4 Apparatus
I
Ordinary laboratory apparatus and
This International Standard specifies a method for determina-
tion of the water content of poly(ethylene terephthalate) and
poly(butylene terephthalate) granules. It is applicable for
apparatus
4.1 Measuring
the determination of water contents in the range 0,002 to
0,05 % him).
The use of a measuring apparatus as described below is recom-
mended, The equipment is shown diagrammatically in the
Water content is of importance in connection with the process-
figure. It is an all-glass system with vacuum-tight connections,
ing of the material, during which it should be below a few hun-
preferably in the form of spherical joints.
dredths of a per cent to prevent degradation.
Bulbs (A) and (B) have volumes of 0,5 Z!Z 0,05 litre and at least
The method is not applicable to poly(ethylene terephthalate)
1 litre, respectively.
and poly(butylene terephthalate) samples containing volatile
compounds, other than water, in amounts contributing
The bulbs are connected to a tube (0, which is connected at
significantly to the vapour pressure at room temperature. The
one end to a high-vacuum gauge (D), and at the other end to a
error introduced by the small amount of acetaldehyde usually
sample tube adapter fitted with a stopcock (El. The tube (C)
present in dried poly(ethylene terephthalate) granules is con-
carries a connection to a vacuum pump fitted with a
sidered to be acceptable. Checks for the presence of larger
stopcock (F) and is fitted with a stopcock (G) to separate the
amounts of volatile compounds shall be carried out periodical-
bulbs. On both sides of the stopcock (G) the tube is connected
ly, for example by gas chromatography. Such checks are par-
via splash heads (H) and check valves (K) to a U-tube oil
ticularly required for new types or grades of material.
manometer (L), the legs of which have a length of at least
350 mm. The sample tube M shall be made of heat-resistant
glass. The sample tubes in a set shall not differ in volume by
more than 5 ml.
2 Principle
NOTES
1 The use of an apparatus of a different design is allowed, provided
A test portion is heated to 200 + 5 OC in a closed space under
that the repeatability requirements mentioned in 6.2.2 can be met.
a high vacuum, thus ensuring complete evaporation of the
2 Silicone oil is suitable for filling the manometer.
water. The resulting pressure increase, to which the water con-
tent is proportional, is measured. The water content is
calculated by reference to a calibration curve prepared using a
4.2 Heating device
hydrate with a known water content, such as sodium molyb-
date dihydrate, which loses its water under the conditions of
An electric oven or any other suitable device may be used to
the test.
heat the sample tube to 200 & 5 OC. The arrangement of the
equipment shall preferably be such as to allow easy installation
and removal of the heating device.
5 Sampling
3 Reagent
Quickly fill a dry container with a representative sample of the
Sodium molybdate, dihydrate (Na2Mo0,m2HZO), of recogniz-
test material and immediately close it to minimize moisture up-
ed analytical quality.
take from the atmosphere.
NOTE - Other hydrates which lose their water of crystallization under
the co
...

SLOVENSKI STANDARD
SIST ISO 6188:1996
01-junij-1996
3ROLPHUQLPDWHULDOL3ROLDONLOHQWHUHIWDODWJUDQXODW'RORþDQMHYVHEQRVWLYRGH
Plastics -- Poly(alkylene terephthalate) granules -- Determination of water content
Plastiques -- Poly(alkylène téréphtalate) en granules -- Détermination de la teneur en
eau
Ta slovenski standard je istoveten z: ISO 6188:1986
ICS:
83.080.10 Duromeri Thermosetting materials
83.080.20 Plastomeri Thermoplastic materials
SIST ISO 6188:1996 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ISO 6188:1996

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SIST ISO 6188:1996
International Standard
INTERNATIONAL ORGANIZATION FOR STANDARDIZATION.MEW&YHAPO~HAR OPTAHMSALWR l-l0 CTAH~APTM3ALWlWRGANlSATlON INTERNATIONALE DE NORMALISATION
Plastics - Poly(alkylene terephthalate) granules -
Determination of water content
Hastiques - Poly(aikyl&ne t&hphtalate) en granules - D&termination de la teneur en eau
Second edition - 198648-01
Ref. No. IS0 6188-1986 (E)
UDC 678.742.2 ’524-492.3 : 543.812
chemical analysis, determination of content, water, test equipment.
Descriptors’ : plastics, polyalkylene terephthalate, granular materials,
Price based on 3 pages

---------------------- Page: 3 ----------------------

SIST ISO 6188:1996
Foreword
IS0 (the International Organization for Standardization) is a worldwide federation of
national standards bodies (IS0 member bodies). The work of preparing International
Standards is normally carried out through IS0 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, govern-
mental and non-governmental, in liaison with ISO, also take part in the work.
Draft International Standards adopted by the technical committees are circulated to
the member bodies for approval before their acceptance as International Standards by
the IS0 Council. They are approved in accordance with IS0 procedures requiring at
least 75 % approval by the member bodies voting.
International Standard IS0 6188 was prepared by Technical Committee ISO/TC 61,
plastics.
IS0 6188 was first published in 1980. This second edition cancels and replaces the first
edition (IS0 6188~1980), of which it constitutes a minor revision.
Users should note that all International Standards undergo revision from time to time
and that any reference made herein to any other International Standard implies its
latest edition, unless otherwise stated.
0 International Organization for Standardization, 1986 0
Printed in Switzerland

---------------------- Page: 4 ----------------------

SIST ISO 6188:1996
IS0 6188-1986 (E)
INTERNATIONAL STANDARD
Plastics - Poly(alkylene terephthalate) granules -
Determination of water content
1 Scope and field of application 4 Apparatus
I
Ordinary laboratory apparatus and
This International Standard specifies a method for determina-
tion of the water content of poly(ethylene terephthalate) and
poly(butylene terephthalate) granules. It is applicable for
apparatus
4.1 Measuring
the determination of water contents in the range 0,002 to
0,05 % him).
The use of a measuring apparatus as described below is recom-
mended, The equipment is shown diagrammatically in the
Water content is of importance in connection with the process-
figure. It is an all-glass system with vacuum-tight connections,
ing of the material, during which it should be below a few hun-
preferably in the form of spherical joints.
dredths of a per cent to prevent degradation.
Bulbs (A) and (B) have volumes of 0,5 Z!Z 0,05 litre and at least
The method is not applicable to poly(ethylene terephthalate)
1 litre, respectively.
and poly(butylene terephthalate) samples containing volatile
compounds, other than water, in amounts contributing
The bulbs are connected to a tube (0, which is connected at
significantly to the vapour pressure at room temperature. The
one end to a high-vacuum gauge (D), and at the other end to a
error introduced by the small amount of acetaldehyde usually
sample tube adapter fitted with a stopcock (El. The tube (C)
present in dried poly(ethylene terephthalate) granules is con-
carries a connection to a vacuum pump fitted with a
sidered to be acceptable. Checks for the presence of larger
stopcock (F) and is fitted with a stopcock (G) to separate the
amounts of volatile compounds shall be carried out periodical-
bulbs. On both sides of the stopcock (G) the tube is connected
ly, for example by gas chromatography. Such checks are par-
via splash heads (H) and check valves (K) to a U-tube oil
ticularly required for new types or grades of material.
manometer (L), the legs of which have a length of at least
350 mm. The sample tube M shall be made of heat-resistant
glass. The sample tubes in a set shall not differ in volume by
more than 5 ml.
2 Principle
NOTES
1 The use of an apparatus of a different design is allowed, provided
A test portion is heated to 200 + 5 OC in a closed space under
that the repeatability requirements mentioned in 6.2.2 can be met.
a high vacuum, thus ensuring complete evaporation of the
2 Silicone oil is suitable for filling the manometer.
water. The resulting pressure increase, to which the water con-
tent is proportional, is measured. The water content is
calculated by reference to a calibration curve prepared using a
4.2 Heating device
hydrate with a known water content, such as sodium molyb-
date dihydrate, which loses its water under the conditions of
An electric oven or any other suitable device may be used to
the test.
heat the sample tube to 200 & 5 OC. The arrangement of the
equipment shall preferably
...

Norme internationale @ 6188
INTERNATIONAL ORGANIZATION FOR STANDARDlZATlON*MEWYHAPOAHAR OPrAHM3AUMR fl0 CTAHAAPTM3AUMM*ORGANISATlON INTERNATIONALE DE NORMALISATION
Plastiques - Poly(alky1ène téréphtalate) en granules -
0 Détermination de la teneur en eau
Plastics - Polyialkylene terephthalate) granules- Determination of water content
Deuxieme 6dition - 1986-08-01
- CDU 678.742.2'524-492.3 : 543.812
Réf. no : IS0 6188-1986 (FI
5
@
' Descripteurs : plastique, polyalkylène téréphtalate, matière granuleuse, analyse chimique, dosage, eau, matériel d'essai.
E3;
G
s
Prix basé sur 3 pages

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Avant-propos
L'ISO (Organisation internationale de normalisation) est une fédération mondiale
d'organismes nationaux de normalisation (comités membres de I'ISO). L'élaboration
des Normes internationales est confiée aux comités techniques de I'ISO. Chaque
comité membre intéressé par une étude a le droit de faire partie du comité technique
créé à cet effet. Les organisations internationales, gouvernementales et non gouverne-
mentales, en liaison avec l'lS0 participent également aux travaux.
Les projets de Normes internationales adoptés par les comités techniques sont soumis
aux comités membres pour approbation, avant leur acceptation comme Normes inter-
nationales par le Conseil de I'ISO. Les Normes internationales sont approuvées confor-
mément aux procédures de I'ISO qui requièrent l'approbation de 75 % au moins des
comités membres votants.
La Norme internationale IS0 6188 a été élaborée par le comité technique ISO/TC 61,
Plastiques.
Cette deuxième édition annule et remplace la première édition (IS0 6188-19801, dont
elle constitue une révision mineure.
L'attention des utilisateurs est attirée sur le fait que toutes les Normes internationales
sont de temps en temps soumises à révision et que toute référence faite à une autre
Norme internationale dans le présent document implique qu'il s'agit, sauf indication
contraire, de la dernière édition.
O Organisation internationale de normalisation, 1986 0
Imprimé en Suisse

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NORM E INTER NAT1 O NALE
IS0 6188-1986 (FI
Plastiques - Poly(alky1ène téréphtalate) en granules -
Détermination de la teneur en eau
1 Objet et domaine d'application
3 Réactif
La présente Norme internationale spécifie une méthode de Molybdate de sodium, dihydraté (Na2Moo,2H20), de qua-
détermination de la teneur en eau du poly(éthyl8ne téréphta-
lité analytique reconnue.
late) et du poly(butylène téréphtalate) en granules. Elle est
applicable à la détermination de teneurs en eau allant de 0,002 à
NOTE - D'autres hydrates qui perdent leur eau de cristallisation dans
0,05 % (m/m).
les conditions de l'essai, tels que le chlorure de baryum dihydraté
iBaCl2,2H20), peuvent également être utilisés.
La teneur en eau est importante vis-à-vis de la transformation
du matériau pendant laquelle la teneur en eau devra être infé-
rieure à quelques centièmes de pour cent afin d'éviter la dégra-
4 Appareillage
dation.
Matériel courant de laboratoire. et
La méthode n'est pas applicable à des échantillons de
poly(éthy1ène téréphtalate) et poly(butylène téréphtalate) con-
0
4.1 Appareil de mesure
tenant des composés volatils, autres que l'eau, en quantités
contribuant sensiblement à la pression de vapeur à la tempéra-
L'appareil de mesure représenté schématiquement à la figure
ture du laboratoire. L'erreur introduite par la petite quantité
est recommandé. II consiste en un système entièrement en
d'acétaldéhyde présente en général dans les granules séchées
verre avec des raccords étanches au vide, de préférence en
de poly(éthy1ène téréphtalate) est considérée comme accepta-
forme de joints sphériques.
ble. Des contrôles sur la présence de quantités plus grandes de
composés volatils doivent être effectués périodiquement, par
Les ballons (A) et (BI ont des volumes de 0.5 f 0,05 litre et au
exemple par chromatographie en phase gazeuse. De tels con-
moins 1 litre respectivement.
trôles sont nécessaires, en particulier dans le cas de nouveaux
types ou de nouvelles qualités de matériau.
Les ballons sont raccordés à un tube (Ci qui est lui-même relié,
à l'une de ses extrémités, à une jauge (D) pour le mesurage de
vides poussés et, à l'autre extrémité, à un adaptateur à robinet
2 Principe
d'arrêt (E) pour la fixation du tube à échantillon. Le tube (Ci
comporte un raccord à robinet d'arrêt (FI qui le relie à une
Chauffage d'une prise d'essai à 200 i: 5 OC dans un espace pompe à vide, et est équipé d'un robinet d'arrêt (G) servant à
clos sous vide poussé, assurant ainsi l'évaporation complète de isoler les deux ballons. Des deux côtés du robinet (GI, le tube
l'eau. Mesurage de l'augmentation de pression qui en résulte, à est relié, par l'intermédiaire de barboteurs (Hi et de valves
laquelle la teneur en eau est proportionnelle. Calcul de la teneur
d'arrêt (Ki, à un tube manométrique à huile (Li, en forme de U,
en eau par référence à un facteur de calibrage calculé en utili- dont les branches ont une longueur d'au moins 350 mm. Le
sant un hydrate à teneur connue en eau, tel que le molybdate
tube à échantillon (MI doit être en verre résistant à la chaleur.
de sodium dihydraté, qui perd son eau dans les conditions de Dans une même série de tubes à échantillons, la différence
l'essai. entre les volumes ne doit pas dépasser 5 ml.
1

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IS0 6188-1986 (FI
6.2 Détermination
NOTES
1 L'utilisation d'un appareil de conception différente est autorisée, à
condition que les exigences de répétabilité mentionnées en 6.2.2 soient 6.2.1 Introduire rapidement un volume de l'échantillon pour
respectées.
essai correspondant à une masse de 12 à 18 g dans un tube à
échantillon, sec, et fixer le tube à l'appareil. (Voir note 1 .I
2 L'huile de silicone convient pour remplir le manomètre.
Tourner le robinet d'arrêt (E) pour relier le tube à échantillon au
tube (Cl, et tourner le robinet d'arrêt (GI pour relier les ballons
4.2 Dispositif de chauffage
(A) et (Bi.
Un four électrique ou tout autre dispositif convenable peut être
Amener la pression dans
...