scholarly journals COMPOSITE ELASTOMER MATERIALS BASED ON NEW INGREDIENTS

2021 ◽  
pp. 32-44
Keyword(s):  
Functional Groups ◽  
Interfacial Interaction ◽  
Elastomeric Materials ◽  
Mineral Fillers ◽  
Rubber Filler

The results of a study present the effect of new modified ingredients on the complex of properties of composite elastomeric materials. Methods for modifying mineral fillers have developed. It found that the introduction of modified ingredients into the composition of elastomeric compositions enhances the interfacial interaction at the “rubber-filler” interface and the formation of additional bonds between rubber macromolecules and functional groups, resulting in an improvement in the complex of properties of the compositions. New accelerators, activators for vulcanization of rubbers and plasticizers with stabilizing properties have proposed, and their optimal contents in the composition have determined.

scholarly journals Prospects and Development of Research of Composite Elastomer Materials

2021 ◽  
Vol 14 (4) ◽  
pp. 464-476
Author(s):  
Bekhzod B. Yoqubov ◽  
◽  
Akhmadjon Ibadullaev ◽  
Dilnora Q. Yoqubova ◽  
Elmira U. Teshabaeva ◽  
...  
Keyword(s):  
Functional Groups ◽  
Interfacial Interaction ◽  
Paramagnetic State ◽  
Rubber Compounds ◽  
Elastomeric Materials ◽  
Temperature Exposure ◽  
Mineral Fillers ◽  
High Degree ◽  
Degree Of Purification ◽  
Rubber Filler

The aim of this work is to study the effect of new modified ingredients on the complex of properties of composite elastomeric materials. It was found that the introduction of modified ingredients into the composition of elastomeric compositions enhances interfacial interaction at the «rubber-filler» interface and the formation of additional bonds between rubber macromolecules and functional groups, as a result of which an improvement in the complex of properties of the compositions is observed. The introduction of modified carbon into the composition of elastomeric compositions enhances interfacial interaction at the «rubber-filler» interface and the formation of additional bonds between rubber macromolecules and functional groups of the oligomer, as a result of which an improvement in the complex of properties of the compositions is observed. The technology of purification of mineral fillers from metal oxides has been developed. A sufficiently high degree of purification by this method is due to the fact that in the process of temperature exposure at 950 K, iron ions from the paramagnetic state (d-form Fe2O3) pass into ferromagnetic (r-form Fe3O4). Feasibility and prospects of using modified fillers, both mineral and organic, in the formulations of rubber compounds for the production of various types of rubber products

NATURAL RUBBER/MICROCRYSTALLINE CELLULOSE COMPOSITES WITH EPOXIDIZED NATURAL RUBBER AS COMPATIBILIZER

2019 ◽  
Vol 92 (2) ◽  
pp. 378-387 ◽  
Author(s):  
Kumarjyoti Roy ◽  
Subhas Chandra Debnath ◽  
Aphiwat Pongwisuthiruchte ◽  
Pranut Potiyaraj
Keyword(s):  
Natural Rubber ◽  
Microcrystalline Cellulose ◽  
Interfacial Interaction ◽  
Probable Mechanism ◽  
Mechanical And Thermal Properties ◽  
Solvent Uptake ◽  
Cellulose Composites ◽  
Mechanism Of Interaction ◽  
Thermal Stability Of ◽  
Rubber Filler

ABSTRACT An exploration of the effect of epoxidized NR with 50 mole% epoxide groups (ENR-50) as compatibilizer on the rubber–filler interaction of microcrystalline cellulose (MCC)-filled NR composites was conducted. The compatibilizing efficiency of ENR-50 was systematically examined in terms of cure and mechanical and thermal properties of NR/MCC composites. ENR-50 compatibilized NR/MCC composites showed moderate enhancement in the maximum rheometric torque and tensile properties compared to either uncompatibilized NR/MCC composite or unfilled NR system. The solvent uptake measurements indicated improved interfacial interaction between NR matrix and MCC in presence of ENR-50 as compatibilizer. A thermogravimetric analysis confirmed excellent improvement in the thermal stability of NR/MCC composite in the presence of ENR-50 as compatibilizer. Fourier transform infrared spectroscopy was used to explain the probable mechanism of interaction between NR matrix and MCC in the presence of ENR-50.

scholarly journals Composite elastomeric materials filled with modified mineral fillers

2021 ◽  
Vol 264 ◽  
pp. 05006
Author(s):  
Ahmadjon Ibadullayev ◽  
Elmira Teshabayeva ◽  
Bakhadir Kakharov ◽  
Dilnoza Nigmatova
Keyword(s):  
Uniform Distribution ◽  
Mineral Filler ◽  
Equal Strength ◽  
Elastomeric Materials ◽  
Adsorbed Sulfur ◽  
Technical Properties ◽  
Mineral Fillers ◽  
Butadiene Styrene

In the paper, the influence of modified Angren kaolin on the properties of composite elastomeric materials based on butadiene-styrene rubber has been established that the addition of modified Angren kaolin into rubber mixtures instead of gas pedals, activators and mineral fillers causes intensive connection of sulfur with macromolecules. Adsorbed sulfur on the surface of particles of modified Angren kaolin and its uniform distribution in the composition and formation of the structure with equal force were determined. This effect shows that the modified Angren kaolin in the curing processes accelerates and activates and affects the formation of the curing grid with equal strength and helps distribution throughout the composite. It has been established that introduction of MAK into the composition of elastomers more than 50 wt. % per 100 wt. % of rubber changes technological and technical properties of composite elastomeric materials. The application of modified Angren kaolin instead of the gas pedal, activator of vulcanization and mineral filler in composite elastomeric materials allows making rubber goods of various purposes.

scholarly journals EFFECT OF MODIFICATION OF MINERAL MICROFIBERS ON THE PROPERTIES OF FIRE- AND HEAT PROTECTIVE COATINGS

2021 ◽  
pp. 42-47
Author(s):  
V. F. Kablov ◽  
O. M. Novopoltseva ◽  
N. A. Keibal ◽  
V. G. Kochetkov ◽  
D. A. Kryukova ◽  
...  
Keyword(s):  
Protective Coatings ◽  
Protective Properties ◽  
Phosphorus Containing ◽  
Elastomeric Materials ◽  
Mineral Fillers

The article presents the results of the study of the effect of modification of mineral microfibers by phosphorus-containing compounds on the vulcanization, physical-mechanical, and fire-heat-protective properties of elastomeric fire-heat-protective coatings based on ethylenepropylenediene rubber. The improvement of the complex of physical-mechanical and fire-heat-protective properties of the fire-heat-protective elastomeric materials. The most effective mineral fillers are quartz fibers modified by FOM-II and kaolin fibers modified by both FBO and FOM-II.

scholarly journals Curing Behaviors, Mechanical and Dynamic Properties of Composites Containing Chloroprene and Butadiene Rubbers Crosslinked with Nano-Iron(III) Oxide

Polymers ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 853
Author(s):  
Anna Słubik ◽  
Aleksandra Smejda-Krzewicka ◽  
Krzysztof Strzelec
Keyword(s):  
Dynamic Properties ◽  
Crosslinking Agent ◽  
Mullins Effect ◽  
Butadiene Rubber ◽  
Rubber Blends ◽  
Elastomeric Materials ◽  
Chloroprene Rubber ◽  
Filler Dispersion ◽  
Mineral Fillers ◽  
Properties Of Composites

This paper discusses the curing behaviors, mechanical and dynamical properties of composites containing chloroprene rubber (CR) and butadiene rubber (BR) reinforced with mineral fillers. The iron(III) oxide nanoparticles were used as a crosslinking agent of the CR/BR blends. The research aimed to evaluate the effectiveness of nano-iron(III) oxide (nano-Fe2O3) as a new crosslinking agent while producing elastomeric materials with good mechanical properties and reduced flammability. The CR/BR (chloroprene rubber/butadiene rubber) blends were filled with silicas from natural resources (chalcedony, Neuburg silica earth) or silicas used in elastomer technology in many fields (aerosil, ultrasil). The results revealed that all composites were characterized by satisfactory tensile strength, tear resistance, and high resistance to fire. The filler dispersion in the elastomer matrix was carried out by using scanning electron microscopy (SEM), while the possibility of the filler–filler or filler–rubber interaction in the designed compositions was determined using the Payne effect and the Mullins effect.

Improving integration between functional groups: A case in organization change and implications for theory and practice

1971 ◽  
Author(s):  
Warren G. Bennis ◽  
Michael Beer ◽  
Gerald R. Pieters ◽  
Alan T. Hundert ◽  
Samuel H. Marcus ◽  
...  
Keyword(s):  
Functional Groups ◽  
Organization Change ◽  
Theory And Practice
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