Rheological Properties of Rubber Compounds with Finely Divided Carbon Additives

2018 ◽  
Vol 91 (1) ◽  
pp. 146-151 ◽  
Author(s):  
Zh. S. Shashok ◽  
N. R. Prokopchuk ◽  
K. V. Vishnevskii ◽  
A. V. Krauklis ◽  
K. O. Borisevich ◽  
...  
Keyword(s):  
Rheological Properties ◽  
Rubber Compounds ◽  
Carbon Additives

Investigation of the physical and rheological properties of SBR-1712 rubber compounds by neural network approaches

2007 ◽  
Vol 28 (5) ◽  
pp. 1737-1741 ◽  
Author(s):  
Enver Demirhan ◽  
Fatma Kandemirli ◽  
Mithat Kandemirli ◽  
Vasyl Kovalishyn
Keyword(s):  
Neural Network ◽  
Rheological Properties ◽  
Rubber Compounds ◽  
Network Approaches

scholarly journals RESEARCH OF TECHNOLOGICAL PROPERTIES OF RUBBER MIXTURES BASED ON SYNTHETIC RUBBERS FILLED WITH CARBON-CONTAINING MATERIAL

2020 ◽  
Vol 2 (3(72)) ◽  
Author(s):  
Sh.T. Dzhuraev ◽  
B.F. Muhiddinov ◽  
A.S. Ibodullaev
Keyword(s):  
Zinc Oxide ◽  
Rheological Properties ◽  
Physicochemical Characteristics ◽  
Technological Properties ◽  
Natural Surface ◽  
Rubber Compounds ◽  
Elastomeric Materials ◽  
Automobile Tires

The paper presents the results of studies of the physicochemical characteristics of the carbon-containing material obtained as a result of the pyrolysis of worn automobile tires. Ankerite (1.21%), zinc oxide (1.14%) and other components. Composite elastomeric materials based on rubbers SKI-3 and Nairit KR-50, filled with carboncontaining material, have been developed. Interconnections between structural radiations and the natural surface of a carbon-containing material and rubber macromolecules were found. The technological and rheological properties of the floor-elastomeric compositions with a carbon-containing effect were studied, and their optimal content in rubber compounds was shown.

Flow Properties and Melt Distortion in Molten Rubber Compounds under Capillary Extrusion

2013 ◽  
Vol 747 ◽  
pp. 627-630
Author(s):  
Watcharapong Chookaew ◽  
Yanichsa Sukniyom ◽  
Somjate Patcharaphun ◽  
Narongrit Sombatsompop
Keyword(s):  
Shear Rate ◽  
Rheological Properties ◽  
Apparent Viscosity ◽  
Wall Slip ◽  
Skin Layer ◽  
Rubber Compound ◽  
Melt Fracture ◽  
Extrudate Swell ◽  
Rubber Compounds ◽  
Capillary Extrusion

The influences of shear rate and vulcanizing system on the rheological properties and melt fracture of natural rubber compounds were investigated by using a rate-controlled capillary rheometer. The rheological properties of rubber compounds were characterized with respect to the apparent viscosity and extrudate swell. The measured results indicated that the apparent viscosity tended to decrease with increasing shear rate. This was due to the pseudoplastic behavior of molten rubber compound. It was evident that rubber compound using EV system showed the lowest apparent viscosity as compared to those obtained by CV and NS systems, respectively. This was due to the occurrences of premature crosslink at the skin layer and the wall slip of rubber compound during the flow in capillary die. Furthermore, the onset of smooth surface was also observed which depending on the types of crosslink at the skin layer.

Goodyear Medalist Lecture. Goodyear Medalist Lecture Towards Understanding of the Rheology of Rubber Compounds and their Processing

2009 ◽  
Vol 82 (2) ◽  
pp. 131-148 ◽  
Author(s):  
James L. White
Keyword(s):  
Rheological Properties ◽  
Processing Technology ◽  
Early Age ◽  
Technical Literature ◽  
Technical Problems ◽  
Rubber Industry ◽  
Professional Career ◽  
Synthetic Rubber ◽  
Rubber Compounds ◽  
The Usa

Abstract The problems of the rheological properties of rubber compounds and the understanding of the processing operations that are used to produce rubber products have received relatively little study in the literature compared to thermoplastics. This seems in part due to an almost 200 year old tradition of industrial secrecy and the vertically integrated nature of the synthetic rubber producer — tire manufacturer combines in the USA. Thus while abundant information has always been available from thermoplastics suppliers on processing technology, little has been available on rubber. Because I began my professional career in the rubber industry and became from an early age concerned with its technical problems, I have not been swayed to the same extent by the thermoplastics dominated technical literature as others in the polymer community.

EVALUATION OF RHEOLOGICAL PROPERTIES OF RUBBER COMPOUNDS BASED ON NR BY DETERMINATION OF NR LIPID CONTENTS OBTAINED FROM ATTENUATED TOTAL REFLECTION FOURIER TRANSFORM INFRARED SPECTRA

2020 ◽  
pp. 000-000
Author(s):  
Zohreh Asghari Barzegar ◽  
Saeed Taghvaei Ganjali ◽  
Mercedeh Malekzadeh ◽  
Fereshteh Motiee
Keyword(s):  
Fourier Transform ◽  
Ftir Spectroscopy ◽  
Rheological Properties ◽  
Fourier Transform Infrared ◽  
Total Reflection ◽  
Attenuated Total Reflection ◽  
Nondestructive Technique ◽  
Lipid Contents ◽  
Rubber Compounds ◽  
Cure Time

ABSTRACT This work was done in three stages. In step 1, the lipid content of different natural rubbers (NRs) was evaluated by two methods, extraction and attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy, and the obtained results were successfully correlated. In the second step, the correlations between scorch time (Ts2) and optimum cure time (T′c90) of rubber compounds based on natural rubber (NR) and the lipid contents of different types of NR (obtained by two methods) were investigated. The suitable linear behaviors were observed. In the third step, because ATR-FTIR spectroscopy is a fast, simple, and nondestructive technique for characterizing NR, the correlations that were obtained by this method were considered to predict the rheological properties of two case studies. The amounts of Ts2 and T′c90 were estimated by errors of about 20% and 15%, respectively. This new approach is a nondestructive and rapid method for predicting the cure characteristics of the defined NR-based rubber compounds by analyzing small amounts of the species.

Rheological Properties of Two Unvulcanized Rubber Compounds as Determined on an Extrusion and a Rotational Viscometer

1964 ◽  
Vol 37 (2) ◽  
pp. 491-502
Author(s):  
F. E. Devine ◽  
J. A. Ross
Keyword(s):  
Shear Stress ◽  
Rheological Properties ◽  
Extrusion Pressure ◽  
Rheological Parameters ◽  
Shear Stresses ◽  
Extrude Material ◽  
Rotational Viscometer ◽  
Shear Rates ◽  
Rubber Compounds

Abstract The viscometer manufactured by A. Macklow-Smith Ltd., which operates at constant rate of extrusion, is a capillary instrument designed for the determination of flow properties of plastics. The instrument has been used for examining the rheological characteristics of rubber compounds and it has been possible to derive the shear stresses required to extrude material at various shear rates between 2 and 1050 sec−1. The general method of operation of the instrument for this purpose is discussed including the determination of preheat time before extrusion and the aspect of incipient vulcanization in the viscometer during extrusion. The effects of various lengths and diameters of dies on rheological parameters and entrance effects are discussed. An important aspect of the work is the observation of a piston height effect in the extruder barrel. Two different compounded polymers have been examined and in one case, the extrusion pressure was found to decrease with piston height whilst in the other highly elastic material, it was found that as the piston descended, the extrusion pressure increased to an equilibrium value. The importance of this effect in obtaining consistent shear stress data is discussed. Results of the work have been expressed in terms of apparent viscosity and also in terms of the parameters which describe a power law relating shear stress and shear rate within the capillary die. Rheological data have been obtained at various temperatures within the range of processing temperatures of the compounds. The effects on rheological properties of mastication and relaxation time after mastication have been examined. Results have been compared with figures obtained on conventional laboratory viscometers such as the Mooney Plastometer and the Wallace Rapid Plastimeter. A biconical, rotational viscometer has also been used at the lower range of shear rates and the results are compared with those obtained from the extrusion viscometer.

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