SIST EN ISO 4577:2000
(Main)Plastics - Polypropylene and propylene-copolymers - Determination of thermal oxidative stability in air - Oven method (ISO 4577:1983)
Plastics - Polypropylene and propylene-copolymers - Determination of thermal oxidative stability in air - Oven method (ISO 4577:1983)
Specifies a method for the determination of the resistance of moulded test specimens of propylene and propylene-copolymers to acclerated ageing at specified temperatures in the range from 100 to 150oC in a forced draught oven. Rotating specimen holders are recommended.- The time to failure is determined by visual examination and taken as the number of days after which a specimen shows localized crazing, crumbling and/or discoloration. The test may be conducted at several temperatures and the data interpreted by the use of the Arrhenius relation.
Kunststoffe - Polypropylen und Propylen-Copolymere - Bestimmung der thermischen Oxidationsstabilität in Luft - Ofen-Verfahren (ISO 4577:1983)
Diese Internationale Norm legt ein Verfahren zur Bestimmung des Widerstandes geformter Probekörper aus Polypropylen und Propylen-Copolymeren gegen beschleunigte Alterung fest, wobei Wärme in Gegenwart von Luft bei Benutzung eines Ofens mit Zwangsbelüftung angewandt wird. Mit dem Verfahren wird versucht, die Lebensdauer von aus Propylen hergestellten Kunststoffteilen einzuschätzen. Die nach diesem Verfahren bestimmte Stabilität steht nicht in direktem Verhältnis zur Gebrauchstauglichkeit des Werkstoffes bei Vorherrschen anderer Umgebungsbedingungen.
Plastiques - Polypropylene et copolymeres de propylene - Détermination de la stabilité a l'oxydation a chaud dans l'air - Méthode a l'étuve (ISO 4577:1983)
La présente Norme internationale spécifie une méthode de détermination de la résistance d'éprouvettes moulées, en polypropylène ou copolymères du propylène, au vieillissement accéléré à la chaleur en présence d'air, dans une étuve à circulation d'air forcé. La méthode représente une tentative d'estimation de la durée de vie en service des pièces en plastiques propyléniques. La stabilité déterminée par la présente méthode n'est pas directement liée à l'aptitude du matériau à une utilisation dans différentes conditions d'environnement.
NOTE - Les niveaux thermiques spécifiés sont considérés comme suffisamment sévères pour entraîner la dégradation, en un temps raisonnable, des types commerciaux de plastique propylénique résistant à la chaleur. Si on le désire, des températures plus basses peuvent être appliquées pour estimer les performances de types de plastique propylénique de stabilité plus faible à la chaleur.
Polimerni materiali - Polipropilen in kopolimeri propilena - Določanje termično-oksidativne stabilnosti na zraku - Metoda s pečjo (ISO 4577:1983)
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 4577:2000
01-maj-2000
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Plastics - Polypropylene and propylene-copolymers - Determination of thermal oxidative
stability in air - Oven method (ISO 4577:1983)
Kunststoffe - Polypropylen und Propylen-Copolymere - Bestimmung der thermischen
Oxidationsstabilität in Luft - Ofen-Verfahren (ISO 4577:1983)
Plastiques - Polypropylene et copolymeres de propylene - Détermination de la stabilité a
l'oxydation a chaud dans l'air - Méthode a l'étuve (ISO 4577:1983)
Ta slovenski standard je istoveten z: EN ISO 4577:1999
ICS:
83.080.20 Plastomeri Thermoplastic materials
SIST EN ISO 4577:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 4577:2000
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SIST EN ISO 4577:2000
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SIST EN ISO 4577:2000
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SIST EN ISO 4577:2000
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SIST EN ISO 4577:2000
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SIST EN ISO 4577:2000
International Standard
INTERNATIONAL ORGANIZATION FOR STANDARDIZATIONWEIK,QYHAPO~HAR OPl-AHM3AUHR fl0 CTAHL1APTH3A~HM@ORGANISATION INTERNATIONALE DE NORMALISATION
Plastics - Polypropylene and propylene-copolymers -
Determination of thermal oxidative stability in air -
Oven method
Plas tiques - Polyprop yltke et copolymkres de prop ylkne - Determination de Ia stabilitb ti l’ox yda tion S chaud dans l’air -
AMhode a IWuve
. .
First edition - 1983-08-15
UDC 678.742.3-13 : 620.19354
Ref. No. ISO 4577-1983 (EI
Descriptors : plastics, polypropylene, stability tests, thermal stability, high temperature tests,
Oxidation tests, ageing tests (materials).
Price based on 4 pages
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SIST EN ISO 4577:2000
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of
national Standards bodies (ISO member bodies). The work of developing International
Standards is carried out through ISO technical committees. Every member body
interested in a subject for which a technical committee has been authorized has the
right to be represented on that committee. International organizations, governmental
and non-governmentai, 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 ISO Council.
International Standard ISO 4577 was developed by Technical Committee ISO/TC 61,
Plastics, and was circulated to the member bodies in May 1982.
lt has been approved by the member bodies of the following countries:
Australia Germany, F. R. Romania
Austria Hungary South Africa, Rep. of
Belgium Iran Spain
B razil Israel Sri Lanka
Canada Italy Sweden
Jamaica
China Switzerland
Czechoslovakia Japan United Kingdom
Egypt, Arab Rep. of Korea, Rep. of USA
Finland Netherlands USSR
France Poland
The member body of the following country expressed disapproval of the document on
technical grounds
India
0 International Organization for Standardization, 1983
Printed in Switzerland
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SIST EN ISO 4577:2000
ISO 45774983 (E)
INTERNATIONAL STANDARD
Plastics - Polypropylene and propylene-copolymers -
Determination of thermal oxidative stability in air -
Oven method
1 Scope and field of application 3 Principle
This International Standard specifies a method for the deter- Accelerated ageing of test specimens by heat in the presence of
mination of the resistance of moulded test specimens of air using a forced draught oven. Visual examination and deter-
polypropylene and propylene-copolymers to accelerated ageing mination of the time to failure.
by heat in the presence of air using a forced draught oven.
Under the severe conditions of this test, the specimens
undergo degradation at a rate dependent upon the thermal en-
The method represents an attempt to estimate the Service life
durante of the propylene plastic under examination.
of Parts fabricated from propylene plastics.
For the purpose of this International Standard, the time to
The stability determined by this method is not directly related
failure of the material is taken as the number of days after
to the suitability of the material for use when different en-
vvhich the specimen Shows localized crazing, crumbling and/or
vironmental conditions prevail.
discoloration.
If a more reliable estimate of the life-temperature relationship of
NOTE - The specified thermal levels are considered sufficiently severe
to Cause failure of commercial grades of heat-stable propylene plastics propylene plastics is required, the test may be conducted at
within a reasonable period of time. If desired, lower temperatures tan several temperatures and the data interpreted through use of
be applied to estimate the performante of propylene plastics with
the Arrhenius relation, by plotting the logarithms of times to
lower heat stabilities.
failure against the reciprocals of the temperatures in kelvins.
Temperatures in the range from 100 to 150 OC, with intervals of
10 OC, are suggested for this purpose.
2 References
4 Apparatus
Standard atmospheres for conditioning
ISO 291, plastics -
and tes ting.
4.1 Oven, mechanical convection type, capable of controlled
circulation of air, with adjustable air intake and exhaust, equip-
ISO 1133, Plastics - Determination of the melt flow rate of
ped with a specimen holder and a temperature control System
thermoplas tics.
capable of adjustment to meet the following conditions:
a) exhaust rate: at least one oven-chamber volume in 10
ISO 1191, Plastics - Polyeth ylenes and polyprop ylenes in
min ;
dilu te solu tion - Determination of viscosity number and of
limiting viscosity number.
b) air velocity : from 0,75 to 1 m/s at any oven Position oc-
cupied by the test specimens;
ISO 1873, Plastics -
Polyprop ylene and prop ylene-copo
...
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