scholarly journals MECHANOCHEMICAL MODIFICATION OF NITRILE-BUTADIENE RUBBER IN THE PRESENCE OF A CHLORINE-CONTAINING REAGENT

2020 ◽  
pp. 59-63
Author(s):  
S. V. Gusev ◽  
Yu. O. Andriasyan ◽  
D. S. Voropaev ◽  
K. V. Sukhareva ◽  
I. A. Mikhailov ◽  
...  
Keyword(s):  
Physical And Mechanical Properties ◽  
Butadiene Rubber ◽  
Optimal Conditions ◽  
Optimal Parameters ◽  
Rubber Mixer ◽  
Nitrile Butadiene Rubber ◽  
Rubber Compounds ◽  
Curing Characteristics ◽  
Mechanochemical Modification ◽  
Nitrile Rubbers

This work is devoted to study of halide mechanochemical modification of nitrile-butadiene rubber (BNCS-18AN) with a chlorine-containing reagent. In previous studies, the optimal parameters for modification were established. The modification was carried out in a laboratory rubber mixer. The obtained halogen-containing rubbers were investigated using ESR spectroscopy. Rubber compounds based on obtained chlorinated butadiene-nitrile rubbers (CNBR), were prepared and their tensile stress-strain properties and curing characteristics were investigated. Vulcanization of rubber compounds was carried out under the established optimal conditions. Physical and mechanical properties of the rubbers were determined. Subsequent studies showed the most probable regularities of the mechanochemical halide modification of nitrile butadiene rubber (BNCS-18AN) with a chlorine-containing modifier (CHCl) in a rubber mixer.

Oil resistance and low‐temperature characteristics of plasticized nitrile butadiene rubber compounds

2019 ◽  
Vol 136 (32) ◽  
pp. 47851 ◽  
Author(s):  
Do Young Kim ◽  
Gi Hong Kim ◽  
Gi Myeong Nam ◽  
Dong Gug Kang ◽  
Kwan Ho Seo
Keyword(s):  
Low Temperature ◽  
Butadiene Rubber ◽  
Temperature Characteristics ◽  
Oil Resistance ◽  
Nitrile Butadiene Rubber ◽  
Rubber Compounds

scholarly journals Organic Zinc Salts as Pro-Ecological Activators for Sulfur Vulcanization of Styrene–Butadiene Rubber

Polymers ◽  
2019 ◽  
Vol 11 (10) ◽  
pp. 1723 ◽  
Author(s):  
Magdalena Maciejewska ◽  
Anna Sowińska ◽  
Judyta Kucharska
Keyword(s):  
Zinc Oxide ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Zinc Ions ◽  
Organic Zinc ◽  
Rubber Compounds ◽  
Curing Characteristics ◽  
Sulfur Vulcanization ◽  
Zinc Salts ◽  
Styrene Butadiene

Organic zinc salts and complexes were applied as activators for sulfur vulcanization of styrene–butadiene elastomer (SBR) in order to reduce the content of zinc ions in rubber compounds as compared with conventionally used zinc oxide. In this article, the effects of different organic zinc activators on the curing characteristics, crosslink densities, and mechanical properties of SBR as well as the aging resistance and thermal behavior of vulcanizates are discussed. Organic zinc salts seem to be good substitutes for zinc oxide as activators for sulfur vulcanization of SBR rubber, without detrimental effects to the vulcanization time and temperature. Moreover, vulcanizates containing organic zinc salts exhibit higher tensile strength and better damping properties than vulcanizate crosslinked with zinc oxide. The application of organic zinc activators allows the amount of zinc ions in SBR compounds to be reduced by 70–90 wt % compared to vulcanizate with zinc oxide. This is very important for ecological reasons, since zinc oxide is classified as being toxic to aquatic species.

scholarly journals Modification of alternative additives and their effect on the rubber properties

2018 ◽  
Vol 157 ◽  
pp. 07007 ◽  
Author(s):  
Darina Ondrušová ◽  
Slavomíra Božeková ◽  
Lenka Buňová ◽  
Mariana Pajtášová ◽  
Ivan Labaj ◽  
...  
Keyword(s):  
Carbon Black ◽  
Glass Batch ◽  
Glass Production ◽  
Physical And Mechanical Properties ◽  
Polymeric Materials ◽  
Partial Replacement ◽  
Polymeric Systems ◽  
Rubber Compounds ◽  
Curing Characteristics ◽  
Natural Aluminosilicate

The present paper deals with a targeted modification of two kinds of alternative additives - waste from glass production and natural mineral filler and explores their effect on the properties of polymeric materials. In the function of first alternative filler was used sludge from weighing the ingredients of glass batch in the glass production. The second used was natural aluminosilicate material based on zeolite (clinoptilolite). These alternative fillers have been modified in order to increase its efficiency, using the silanes: 3-aminopropyl-triethoxysilane, bis(triethoxysilyl)propyl-tetrasulfide and 3-(triethoxysilyl)propyl-methacrylate. In the case of alternative filler based on zeolite the influence of silanization conditions on the filler efficiency have been also studied. Prepared modified fillers were mixed into rubber compounds as partial replacement of commonly used filler – carbon black. The influence of prepared fillers on rheology and curing characteristics of rubber compounds and also on physical and mechanical properties of vulcanizates has been studied. Obtained results of measured characteristics of polymeric systems containing prepared alternative fillers were compared with the results obtained in the case of reference rubber compound with a commertially used filler – carbon black.

The improvement of physical and mechanical properties of sealers based on nitrile-butadiene rubber and combination of nano-metal oxides

2020 ◽  
pp. 174-182
Author(s):  
R.F. Khankishiyeva ◽  
◽  
H.N. Akhundzada ◽  
Keyword(s):  
Mechanical Properties ◽  
Metal Oxides ◽  
Chemical Interaction ◽  
Physical And Mechanical Properties ◽  
Mechanical Tests ◽  
Butadiene Rubber ◽  
Nanosized Powders ◽  
Nitrile Butadiene Rubber ◽  
Crosslinking Process ◽  
First Time

The chemical interaction of disulphochloride aromatic compounds with nitrile butadiene rubber (NBR) in the presence of combined nanosized powders of metal oxides (ZnO and Al2O3) was studied for the first time. Vulcanization of the prepared blends has been induced with two methods: by irradiation of gamma rays (D=300 kGy) and by pre-heating in the hydraulicpress and then subsequent irradiation (150 oC x 5', 300 kGy). In order to activate the crosslinking process, a combination of nano-oxides ZnO and Al2O3 were used. The surface of the nanocomposite was studied by using scanning electron microscopy. The mechanical properties of modified blends were studied and then compared with controlling sample (vulcanized with sulphur) and analyzed by the mechanical tests in aggressive environments after thermal aging. The study found that the use of 1,3-disulphochloride benzene with nano oxides produces cured materials with good resistance to aging and provides high service properties in air, seawater, and oil-bearing solution.

scholarly journals Influence of Chemically Modified Ultra-High Molecular Weight Polyethylene on the Properties of Butadiene Nitrile Rubber

2021 ◽  
pp. 424-432
Author(s):  
Nikolay V. Shadrinov ◽  
Vladimir D. Gogolev ◽  
Tatyana A. Isakova
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Chemical Etching ◽  
Atmospheric Oxygen ◽  
Heat Exposure ◽  
Physical And Mechanical Properties ◽  
Butadiene Rubber ◽  
Nitrile Butadiene Rubber ◽  
Technical Properties ◽  
Ultra High Molecular Weight

For the manufacture of frost-resistant oil and petrol-resistant rubber products, one of the most widely used rubbers is nitrile-butadiene rubber (NBR) with a low acrylonitrile content of 17–20 %. However, the technical properties of its vulcanizates do not always meet all high performance requirements. Therefore, the study of the possibility of improving the technical characteristics of vulcanizates based on frost-resistant NBR is an urgent task. This paper presents the results of studying nitrile-butadiene rubber BNKS‑18AMN filled with ultra-high molecular weight polyethylene (UHMWPE). A feature of this work is the study of the possibility of increasing the technical properties of the obtained elastomeric composites by increasing the interaction between chemically inert UHMWPE and BNKS‑18AMN using the chemical modification of UHMWPE. The modification of UHMWPE was carried out by chemical etching in a solution of chromic acid for 3 and 20 hours. A complex of laboratory studies of the obtained samples was carried out. The influence of the duration of chemical etching of UHMWPE on the rheological and vulcanization properties has been studied on the analyzer of the processing of rubber. It is shown that the filling of UHMWPE into BNKS‑18AMN, in general, leads to an increase in the viscosity of the rubber compound. Chemical etching of UHMWPE leads to a decrease in the rate of vulcanization and the density of the three-dimensional spatial structure of the vulcanizate. The study of the physical and mechanical properties in tension, wear resistance during abrasion and swelling in standard hydrocarbon liquid for testing rubbers SZR‑3 showed that chemical etching of UHMWPE leads to a decrease in strength characteristics, but at the same time leads to an increase in resistance to abrasion and has no significant effect on swelling. The study of changes in the properties of samples after heat exposure showed that chemical etching of UHMWPE significantly reduces the resistance to thermal oxidative destruction in the presence of atmospheric oxygen, but does not affect the resistance to thermal aging in the SZR‑3 hydrocarbon environment

Sign in / Sign up

Export Citation Format

Share Document