SIST EN ISO 180:2000

SLOVENSKI STANDARD
SIST EN ISO 180:2000
01-maj-2000
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Plastics - Determination of Izod impact strength (ISO 180:1993, including Technical
Corrigendum 1:1995)
Kunststoffe - Bestimmung der Izod-Schlagzähigkeit (ISO 180:1993, einschliesslich
Technische Korrektur 1:1995)
Plastiques - Détermination de la résistance au choc Izod (ISO 180:1993, Rectificatif
Technique 1:1995 inclus)
Ta slovenski standard je istoveten z: EN ISO 180:1996
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
SIST EN ISO 180:2000 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 180:2000

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SIST EN ISO 180:2000

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SIST EN ISO 180:2000

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SIST EN ISO 180:2000

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SIST EN ISO 180:2000

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SIST EN ISO 180:2000
INTERNATIONAL IS0
STANDARD
180
Second edition
1993-05-I 5
Plastics - Determination of lzod impact
strength
- DBtermination de la rdsistance au choc lzod
P/as tiques
Reference number
IS0 180:1993(E)

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SIST EN ISO 180:2000
IS0 180:1993(E)
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, governmental
and non-governmental, in liaison with ISO, also take part in the work. IS0
collaborates closely with the International Electrotechnical Commission
(I EC) on all matters of electrotechnical standardization.
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.
International Standard IS0 180 was prepared by Technical Committee
lSO/lC 61, Plastics, Sub-Committee SC 2, Mechanical properties.
This second edition cancels and replaces the first edition (IS0 180:1982),
which has been revised in the following ways.
- The recommended specimen types for testing moulding materials are
reduced to one only, which can be taken from the central part of the
multipurpose test specimen complying with IS0 3167 by simple ma-
chining.
- Instead of testing in a “ reversed-note h” co nfiguration, the use of
unnotched specimens is recommended.
- The designations of sizes are harmonized to those of a great number
of other International Standards for testing plastics, in accordance with
IS0 31.
- The method designations are changed and fitted to the modifications
described above.
Annex A forms an integral part of this International Standard.
0 IS0 1993
All rights reserved. No part of this publication may be reproduced or utilized in any form or
by any means, electronic or mechanical, including photocopying and microfilm, without per-
mission in writing from the publisher.
International Organization for Standardization
Case Postale 56 l CH-1211 Geneve 20 l Switzerla nd
Printed in Switzerland
II

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SIST EN ISO 180:2000
INTERNATIONAL STANDARD IS0 180:1993(E)
Plastics - Determination of lzod impact strength
- thermotropic liquid-crystal polymers.
1 Scope
The method is not normally suitable for use with rigid
cellular materials and sandwich structures containing
1.1 This International Standard specifies a method
cellular material. Also, notched specimens are not
for determining the lzod impact strength of plastics
normally used for long-fibre-reinforced composites or
under defined conditions. A number of different types
for thermotropic liquid-crystal polymers.
of specimen and test configurations are defined. Dif-
ferent test parameters are specified according to the
type of material, the type of test specimen and the
type of notch. 1.4 The method is adapted to the use of specimens
which may be either moulded to the chosen dimen-
sions, machined from the central portion of a standard
1.2 The method is used to investigate the behaviour
multipurpose test specimen (see IS0 3167) or ma-
of specified types of specimen under the impact
chined from finished and semifinished products such
conditions defined and for estimating the brittleness
as mouldings, laminates and extruded or cast sheet.
or toughness of specimens within the limitations in-
herent in the test conditions.
1.5 The method specifies preferred dimensions for
the test specimen. Tests which are carried out on
1.3 The method is suitable for use with the follow-
specimens of different dimensions and notches, or
ing range of materials:
on specimens which are prepared under different
conditions may produce results which are not com-
- rigid thermoplastics moulding and extrusion ma-
parable. Other factors, such as the energy capacity
terials, including filled and reinforced compounds
of the pendulum, its impact velocity and the condi-
in addition to unfilled types; rigid thermoplastics
tioning of the specimens can also influence the re-
sheet;
sults. Consequently, when comparative data are
required, these factors must be carefully controlled
- rigid thermosetting moulding materials, including
and recorded.
filled and reinforced compounds; rigid thermo-
setting sheet, including laminates;
- fibre-reinforced thermoset and thermoplastics 1.6 The method should not be used as a source of
data for design calculations of components. Infor-
composites incorporating unidirectional or non-
mation on the typical behaviour of a material can be
unidirectional reinforcements such as mat, woven
obtained, however, by testing at different temper-
fabrics, woven rovings, chopped strands, combi-
nation and hybrid reinforcements, rovings and atures, by varying the notch radius and/or the thick-
milled fibres; sheet made from pre-impregnated ness and by testing specimens prepared under
materials (prepregs); different conditions.

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SIST EN ISO 180:2000
3 Definitions
2 Normative references
For the purposes of this International Standard, the
following definitions apply.
3.1 lzod impact strength of unnotched speci-
The following standards contain provisions which,
mens, qu: Impact energy absorbed in breaking an
through reference in this text, constitute provisions
unnotched specimen, referred to the original cross-
of this International Standard. At the time of publi-
sectional area of the specimen.
cation, the editions indicated were valid. All standards
are subject to revision, and parties to agreements
It is expressed in kilojoules per square metre
based on this International Standard are encouraged
(kJ/m2).
to investigate the possibility of applying the most re-
cent editions of the standards indicated below.
3.2 lzod impact strength of notched specimens,
Members of IEC and IS0 maintain registers of cur-
qN: Impact energy absorbed in breaking a notched
rently valid International Standards.
specimen, referred to the original cross-sectional area
of the specimen at the notch, the pendulum striking
IS0 291:1977, Plastics - Standard atmospheres for
the face containing the notch.
conditioning and testing.
It is expressed in kilojoules per square metre
IS0 293:1986, Plastics - Compression moulding test
(kJ/mz).
specimens of thermoplastic materials.
3.3 lzod impact strength of reversed-notch spec-
IS0 294:-l), Plastics - Injection moulding of test
imens, qR: Impact energy absorbed in breaking a
specimens of thermoplastic materials.
reversed-notch specimen, referred to the original
cross-sectional area of the specimen at the notch, the
IS0 295:1991, Plastics - Compression moulding of
pendulum striking the face opposite the notch.
test specimens of thermose tting materials.
It is expressed in kilojoules per square metre
(kJ/m2).
IS0 1268:I 974, Plastics - Preparation of glass fibre
reinforced, resin bonded, low-pressure laminated
3.4 parallel impact (p) (for laminar reinforced plas-
plates or panels for test purposes.
tics): Direction of blow parallel to the laminate plane
of sheet materials. The blow direction in the lzod test
IS0 2557-l : 1989, Plastics - Amorphous thermoplas-
is “edgewise” (e) (see figure 1, “edgewise parallel ”).
tics - Preparation of test specimens with a specified
maximum reversion - Part 7: Bars.
3.5 normal impact (n) (for laminar reinforced plas-
tics): Direction of blow normal to the laminate plane
- Amorphous thermoplas-
IS0 2557-2: 1986, Plastics
of sheet materials (see figure 1, “edgewise normal ”).
tics - Preparation of test specimens with a specified
reversion - Part 2: Plates.
NOTE 1 This kind of impact is not used with the lzod
test, but is indicated only for clarifying the designation sys-
IS0 2602:1980, Statistical interpretation of test re-
tem.
sults - Estimation of the mean - Confidence
in ten/al.
4 Principle
IS0 2818:-? Plastics - Preparation of test speci-
The test specimen, supported as a vertical cantilever
mens by machining.
beam, is broken by a single swing of a pendulum,
with the line of impact at a fixed distance from the
IS0 3167: -31, Plastics - Multipurpose test speci-
specimen clamp and, in the case of notched speci-
mens.
mens, from the centreline of the notch (see figure 2).
1) To be published. (Revision of IS0 294:1975)
2) To be published. (Revision of IS0 2818:1980)
3) To be published. (Revision of IS0 3167:1983)
2

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SIST EN ISO 180:2000
IS0 180:1993(E)
edgewise e
flatwise f
parallel p
Movable vice jaw
Direction
of blow
normal n
\
Direction of blow with respect to specimen thickness h and specimen width b: edgewise (e) and flatwise (f); with
respect to the laminate plane: parallel (p) and normal (n).
The usual lzod test is edgewise parallel. When h = b, then parallel as well as normal can be tested.
Figure 1 - Scheme of designations describing the direction of blow

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SIST EN ISO 180:2000
IS0 180:1993(E)
In order to apply the test to the full range of materials
5 Apparatus
specified in 1.3, it is necessary to use a set of inter-
changeable pendulums (see 7.3). It is not advisable to
5.1 Testing machine
compare results obtained with different pendulums.
The frictional losses shall be periodically checked.
5.1.1 The testing machine shall be of the pendulum
type and shall be of rigid construction. It shall be ca-
NOTE 2 Pendulums with energies other than those given
pable of measuring the impact energy, W, absorbed
in table 1 are permitted, but it is planned to withdraw this
in breaking a test specimen. The value of this energy
option at the next revision.
is defined as the difference between the initial en-
ergy, E, of the pendulum and the energy remaining in
the pendulum after breaking the test specimen. The 5.1.3 The machine shall be securely fixed to a
energy shall be corrected for losses due to friction and
foundation having a mass at least 40 times that of the
air resistance (see table 1 and 7.4).
heaviest pendulum in use. The foundation shall be
capable of being adjusted so that the orientations of
5.1.2 The machine shall have the characteristics the pendulum and vice are as specified in 5.1.4 and
shown in table 1. 5.1.6.
Table 1 - Characteristics of pendulum impact testing machines
Energy E Velocity at impact Maximum permissible
Permissible errorl) after
frictional loss without
correction with specimen
(nominal)
VO
specimen
J J J
m/s
0,02 0,Ol
LO
0,03 0,Ol
2,75
3,5(f 10%) 0,03 0,02
515
0,05 0,05
1 I,0
0,lO 0,lO
22,0
1) The permissible error shall not be exceeded over the 10 % to 80 % range of the pendulum capacity.
Dimensions en millim&res
Striking edge radius
R, = 0,8 *0,2
Vice jaw edge radius
R2 = 0,2 *O,l
Movable vice jaw
Figure 2 - Vice support, test specimen and striking edge shown at impact of notched specimen
4

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SIST EN ISO 180:2000
51.4 The striking edge of the pendulum shall be brated torque wrench or a pneumatic or hydraulic de-
hardened steel with a cylindrical surface having a ra- vice on the vice clamping screw.
dius of curvature of R, = 0,8 mm & 0,2 mm, with its
axis horizontal and perpendicular to the plane of mo-
5.2 Micrometers and gauges
tion of the pendulum. It shall be aligned so that it
contacts the full width or thickness of rectangular test
Micrometers and gauges suitable for measuring the
specimens. The line of contact shall be perpendicular
essential dimensions of the test specimens to an ac-
within + 2’ to the longitudinal axis of the test speci-
curacy of 0,02 mm are required. For measuring the
men.
dimension h of notched specimens, the micrometer
shall be fitted with an anvil of width 2 mm to 3 mm
5.1.5 The distance between the axis of rotation and
and of suitable profile to fit the shape of the notch.
the point of impact shall be within + 1 % of the pen-
-
dulum length L,.
6 Test specimens
NOTE 3 The pendulum length 4, in metres, may be de-
termined experimentally from the period of small amplitude
6.1 Preparation
oscillations of the pendulum by means of the following
equation:
6.1.1 Moulding or extrusion compounds
=&XT*
. . .
(1)
Lp
4x2
Specimens shall be prepared in accordance with the
relevant material specification. When none exists, or
where
unless otherwise specified, specimens shall be either
is the standard acceleration of free fall, in me-
gn directly compression moulded or injection moulded
tres per second squared (9,81
mls2>
from the material in accordance with IS0 293,
IS0 294, IS0 295, IS0 2557-l or IS0 2557-2 as ap-
T is the period, in seconds, of a single complete
propriate, or machined in accordance with IS0 2818
swing (to and fro) determined from at least 50
from sheets that have been compression or injection
consecutive and uninterrupted swings (known
moulded from the compound.
to an accuracy of one part in two thousand).
The angle of swing shall be less than 5” to each
side of the centre. NOTE 5 Type 1 specimens may be taken from the central
part of the test specimen type A complying with IS0 3167
(see 6.3).
5.1.6 The test specimen support shall comprise a
vice consisting of a fixed and a moveable jaw. The
6.1.2 Sheets
clamping surfaces of the jaws shall be parallel to
within 0,025 mm. The vice shall be arranged to hold
Specimens shall be machined from sheets in accord-
the test specimen vertically with respect to its long
ance with IS0 2818. Whenever possible, specimens
axis and at right angles to the top plane of the vice
of type 1 with notch A shall be used. The machined
(see figure2). The top edges of the vice jaws shall
surface of unnotched specimens shall not be tested
have radii R, = 0,2 mm * 0,l mm.
under tension.
Means shall be provided to ensure that, when a
notched test specimen is clamped in the vice, the top
6.1.3 Long-fibre-reinforced polymers
plane of the vice is within 0,2 mm of the plane
bisecting the angle of the notch.
A panel shall be prepared in accordance with
IS0 1268 or another specified or agreed upon
The vice shall be positioned so that the test specimen
preparation procedure. Specimens shall be machined
is central, to within & 0,05 mm, to the striking edge
in accordance with IS0 2818.
and so that the centre of the striking edge is
22,0 mm + 0,2 mm above the top plane of the vice
6.1.4 Checking
(see figure2). The vice shall be designe
...