Abstract

Details for two new tests for rheological material characterization are given resulting from the development of standard rheological tests:

1. The well-known Mooney-viscosity test is improved by automatically adding a relaxation test. Thereby, information on elastic material behavior is obtained in a very simple and fast manner. It is especially useful for rubber compounds.

2. The parallel plate compressive plastometer or Defo test gives information on viscous and elastic material behavior in the compressive and recovery phases of the test. Intensive developments of the instrument and changes and additions in the test procedure resulted in a relatively simple test, giving a number of accurate rheological test data for each quality including the flow exponent. It is especially useful for testing rubber polymers.

Typical results from several years experience are given.

References

1.
Fedyukin
,
D. L.
,
Zakharenko
,
N. V.
, and
Suzdal'nitskaya
,
Zh. S.
, “
The ‘Universal’ Device for Determining the Viscosity, Vulcanisation and Relaxation Characteristics of Rubber Mixes
,”
Soviet Rubber Technology
, Vol.
30
, No.
8
,
1971
, pp.
46
-
48
.
2.
Markert
,
J.
, “
Einfluß der Molekülstruktur auf Mischund Verformungseigenschaften einiger Synthesekautschuke
,”
Kautschuk und Gummi Kunststoffe
, Vol.
34
, No.
4
,
1981
, pp.
269
-
275
.
3.
Turner
,
D. M.
and
Moore
,
M. D.
, “
The Effect of Pressure and Metal Surface on the Flow Behaviour of Rubber
,” in
Practical Rheology and Polymer Processing
,
PRI International Conference
,
Loughborough Plastics and Rubber Institute
,
London
,
1980
, pp.
6-1-6
-
8
.
4.
Moghe
,
S. R.
, “
Dynamic Stress Relaxometer, a New Processability Instrument
,”
Rubber Chemistry and Technology
 0035-9475, Vol.
49
, No.
2
,
1976
, pp.
247
-
257
.
5.
Cotten
,
G. R.
and
Boonstra
,
B. B.
, “
Stress Relaxation in Rubbers Containing Reinforced Fillers
,”
Journal of Applied Polymer Science
 0021-8995, Vol.
9
No.
10
,
1965
, pp.
3395
-
3408
.
6.
Leblanc
,
J. L.
and
Price
,
K.
, “
The Influence of Compound Variations on Stress Relaxation Behavior of Unvulcanized Rubber Stocks
,”
Elastomerics
, Vol.
112
, No.
11
,
1980
, pp.
27
-
32
and 50–51.
7.
Dove
,
R. A.
,
Turner
,
D. M.
, and
Martin
,
T.
, “
A Model for Uncured Rubber Behaviour
,” in
Rubbercon '77, The International Rubber Conference
,
The Plastics and Rubber Institute
,
London
,
1977
, pp. 29.1-29.11.
8.
Baader
,
Th.
, “
Die Kontrolle der Verarbeitbarkeit von Kautschukmischungen: Probleme und Ziele
,”
Kautschuk
, Vol.
14
, No.
11
,
1938
, pp.
223
-
231
.
9.
Baader
,
Th.
, “
Die Prüfung der Verarbeitungseigenschaften von Kautschuk mit Hilfe des Deformations-Meßgerätes (Bauart Continental)
,”
Kautschuk und Gummi
, Vol.
3
, No.
5
, pp.
159
-
164
.
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