PREPARATION OF LOW TEMPERATURE RESISTANT AND HIGH ELECTRICAL INSULATION CHLOROPRENE RUBBER–BUTADIENE RUBBER BLENDS

2014 ◽  
Vol 87 (2) ◽  
pp. 360-369 ◽  
Author(s):  
Junping Zheng ◽  
Jin Tan ◽  
Hong Gao ◽  
Chuanzeng Wang ◽  
Zhilei Dong
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Mechanical Analysis ◽  
Electrical Insulation ◽  
Butadiene Rubber ◽  
Temperature Resistance ◽  
Rubber Blends ◽  
Chloroprene Rubber ◽  
Low Temperature Resistance ◽  
Electrical Insulation Properties

ABSTRACT To satisfy some special demands of many applications in the fields of aerospace and the electronic industry, low temperature resistant and high electrical insulation chloroprene rubber (CR) was prepared by blending pristine CR with different weight ratios of butadiene rubber (BR). The low temperature resistance, electrical insulation properties, and mechanical properties of CR/BR blends were investigated. With increasing BR content, the low temperature resistance and electrical insulation properties were improved, whereas the tensile strength and elongation at break decreased. For the CR/BR (65/35) blend, filled with SiO2, the brittleness temperature (Tb) was reduced to −61 °C and the high electrical insulation properties were obtained without sacrificing mechanical properties too much. The tan δ plots of CR/BR blends, investigated by dynamic mechanical analysis, also revealed that BR could reduce glass transition temperature (Tg) and improve low temperature resistance of CR. The phase contrast microscope images of CR/BR blends demonstrated that the phase structure of the blends changed with increasing BR content. Furthermore, the fracture surfaces of CR/BR blends, observed by scanning electron microscopy, showed that the compatibility of CR/BR blends was poor although the CR/BR blends were homogeneous in macrostructure.

Research on Mechanical Properties, Compatibility, Flame Retardancy, Hot-Air Ageing Resistance of Hydrogenated Nitrile-Butadiene Rubber/Chloroprene Rubber Blends

2013 ◽  
Vol 750-752 ◽  
pp. 816-819 ◽  
Author(s):  
Teng Teng Wang ◽  
Guo Lun Zhong ◽  
Li Ling Zhou
Keyword(s):  
Mechanical Properties ◽  
Flame Retardancy ◽  
Oxygen Index ◽  
Mechanical Analysis ◽  
Butadiene Rubber ◽  
Rubber Blends ◽  
Nitrile Butadiene Rubber ◽  
Hot Air ◽  
Chloroprene Rubber ◽  
Limited Oxygen

The mechanical properties, compatibility, flame retardancy property, hot-air ageing resistance of hydrogenated nitrile-butadiene rubber (HNBR) / chloroprene rubber (CR) blends were investigated. With increasing CR, stress at 100% elongation, shore A hardness, limited oxygen index of HNBR/CR blends increased, while the tensile strength, hot-air aging resistance of the blends decreased. Differential scanning calorimeter (DSC) revealed that it’s incompatible with both HNBR and CR before vulcanization, however they became compatible completely after vulcanization as indicated by Dynamic Mechanical Analysis (DMA).

A Study of Mechanical, Oil Resistance, and Low Temperature Resistance of NBR Vulcanizates

2016 ◽  
Vol 703 ◽  
pp. 165-171 ◽  
Author(s):  
Kwan Ho Seo ◽  
Gi Myeong Nam ◽  
Dong Gug Kang ◽  
Gi Hong Kim ◽  
Do Young Kim ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Testing Machine ◽  
Butadiene Rubber ◽  
Scanning Calorimetry ◽  
Temperature Resistance ◽  
Oil Resistance ◽  
Universal Testing ◽  
Optimum Formulation ◽  
Low Temperature Resistance

In this study, mechanical properties, oil resistance of Nitrile Butadiene Rubber (NBR) as material of an automotive were investigated at low temperature conditions. In order to find the optimum formulation used various grades of NBR with different contents of Acrylonitrile (ACN) such as NT1846F, DN407, B7150, B6240 and N215SL. The mechanical properties, oil and low temperature resistance of NBR were measured using moving die rheometer, durometer, universal testing machine, differential scanning calorimetry, and Gehman tester. The hardness was increased with an increased ACN contents. The low temperature resistance, and degree of swelling were increased that decreased ACN contents have lower Tg, lower value of Gehaman test.

scholarly journals Enhancement of Chloroprene/Natural/Butadiene Rubber Nanocomposite Properties Using Organoclays and Their Combination with Carbon Black as Fillers

Polymers ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 1085
Author(s):  
Patricia Castaño-Rivera ◽  
Isabel Calle-Holguín ◽  
Johanna Castaño ◽  
Gustavo Cabrera-Barjas ◽  
Karen Galvez-Garrido ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Carbon Black ◽  
High Performance ◽  
Rubber Matrix ◽  
Butadiene Rubber ◽  
X Ray Diffraction ◽  
X Ray ◽  
Rubber Blends ◽  
Ft Ir ◽  
Chloroprene Rubber

Organoclay nanoparticles (Cloisite® C10A, Cloisite® C15) and their combination with carbon black (N330) were studied as fillers in chloroprene/natural/butadiene rubber blends to prepare nanocomposites. The effect of filler type and load on the physical mechanical properties of nanocomposites was determined and correlated with its structure, compatibility and cure properties using Fourier Transformed Infrared (FT-IR), X-ray Diffraction (XRD), Thermogravimetric Analysis (TGA) and rheometric analysis. Physical mechanical properties were improved by organoclays at 5–7 phr. Nanocomposites with organoclays exhibited a remarkable increase up to 46% in abrasion resistance. The improvement in properties was attributed to good organoclay dispersion in the rubber matrix and to the compatibility between them and the chloroprene rubber. Carbon black at a 40 phr load was not the optimal concentration to interact with organoclays. The present study confirmed that organoclays can be a reinforcing filler for high performance applications in rubber nanocomposites.

Graphene Oxide-Based Composite Organohydrogels with High Strength and Low Temperature Resistance for Strain Sensors

Soft Matter ◽  
2022 ◽  
Author(s):  
Rui Zhao ◽  
Li Jiang ◽  
Ping Zhang ◽  
Dan Li ◽  
Zhenzhong Guo ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Low Temperature ◽  
Rapid Development ◽  
High Strength ◽  
Strain Sensors ◽  
Temperature Resistance ◽  
Polymeric Hydrogel ◽  
Low Temperature Resistance

In the recent years, a rapid development of the polymeric hydrogel-based sensors has been witnessed. However, conventional hydrogels often exhibit poor mechanical properties. Additionally, the use of these sensors at...

Study on Application of the Blends of Nitrile Rubber with Acrylate Rubber in the Coat-Metal Sealing Gasket

2011 ◽  
Vol 393-395 ◽  
pp. 1438-1442 ◽  
Author(s):  
Zu Min Qiu ◽  
Chao Yan Qin ◽  
Jun Ming Qiu
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Heat Resistance ◽  
Nitrile Rubber ◽  
Temperature Resistance ◽  
Oil Resistance ◽  
Comprehensive Properties ◽  
The Cost ◽  
Low Temperature Resistance

This paper discussed the effect of different blending ratio with BNR and ACM on the mechanical properties, heat resistance, low temperature resistance and oil resistance of coat-metal sealing gasket. The result showed that the comprehensive properties of the NBR/ACM blends at the ratio of 85/15 were preferable to the NBR and ACM, the low temperature resistance and oil resistance of NBR are taken into account. The cost of the blends were lower than the ACM. The blends can be used for coat-metal sealing gasket instead of NBR.

Preparation on Low-Temperature Resistance Nitrile-Butadiene Rubber Coat-Metal Sealing Gasket

2010 ◽  
Vol 152-153 ◽  
pp. 572-579
Author(s):  
Guan Li ◽  
Zu Min Qiu ◽  
Ai Bin Zhu ◽  
Zhong Wei Liu
Keyword(s):  
Low Temperature ◽  
Preparation Method ◽  
Technological Factor ◽  
Butadiene Rubber ◽  
Curing Agent ◽  
Temperature Resistance ◽  
Oil Resistance ◽  
Nitrile Butadiene Rubber ◽  
Reinforcing Agent ◽  
Low Temperature Resistance

The preparation method of low-temperature resistance nitrile-butadiene rubber coat-metal sealing gasket was introduced. The type and the dosage of curing agent, reinforcing agent and other additives were considered, the optimum technological factor was determined. Use of such nitrile-butadiene rubber coat-metal sealing gasket, its low temperature resistance and oil resistance were good enough for the seals which work at -40 -160 .

Preparation of supramolecular silicone elastomersviahomo- and hetero-assembly

2018 ◽  
Vol 42 (3) ◽  
pp. 1973-1978 ◽  
Author(s):  
Jinfeng Cao ◽  
Linglong Feng ◽  
Shengyu Feng
Keyword(s):  
Mechanical Properties ◽  
Low Temperature ◽  
Self Assembly ◽  
Silicone Elastomers ◽  
Temperature Resistance ◽  
Tunable Mechanical Properties ◽  
Low Temperature Resistance

Supramolecular silicone elastomers were preparedviaself-assembly and they exhibit ultra-low temperature resistance and tunable mechanical properties.

scholarly journals Influence of Treated Distillate Aromatic Extract (TDAE) Content and Addition Time on Rubber-Filler Interactions in Silica Filled SBR/BR Blends

Polymers ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 698
Author(s):  
Selin Sökmen ◽  
Katja Oßwald ◽  
Katrin Reincke ◽  
Sybill Ilisch
Keyword(s):  
Mechanical Properties ◽  
Oil Content ◽  
Tensile Modulus ◽  
Mechanical Analysis ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Binary Blends ◽  
Rubber Layer ◽  
Processing Aids ◽  
Rubber Filler

High compatibility and good rubber–filler interactions are required in order to obtain high quality products. Rubber–filler and filler–filler interactions can be influenced by various material factors, such as the presence of processing aids. Although different processing aids, especially the plasticizers, and their effects on compatibility have been investigated in the literature, their influence on rubber–filler interactions in highly active filler reinforced mixtures is not explicit and has not been investigated in depth. For this purpose, the influence of treated distillate aromatic extract (TDAE) oil content and its addition time on interactions between silica and rubber chains were investigated in this study. Rubber–filler and filler–filler interactions of uncured and cured silica-filled SBR/BR blends were characterized by using rubber layer L concept and dynamic mechanical analysis, whereas mechanical properties were studied by tensile test and Shore A hardness. Five parts per hundred rubber (phr) TDAE addition at 0, 1.5, and 3 min of mixing were characterized to investigate the influence of TDAE addition time on rubber–filler interactions. It was observed that addition time of TDAE can influence the development of bounded rubber structure and the interfacial interactions, especially at short time of mixing, less than 5 min. Oil addition with silica at 1.5 min of mixing resulted in fast rubber layer development and a small reduction in storage shear modulus of uncured blends. The influence of oil content on rubber–filler and filler–filler interactions were investigated for the binary blends without oil, with 5 and 20 phr TDAE content. The addition of 5 phr oil resulted in a slight increase in rubber layer and 0.05 MPa reduction in Payne effect of uncured blends. The storage tensile modulus of vulcanizates at small strains decreased from 13.97 to 8.28 MPa after oil addition. Twenty parts per hundred rubber (phr) oil addition to binary blends caused rubber layer L to decrease from 0.45 to 0.42. The storage tensile modulus of the vulcanizates and its reduction with higher amplitudes were incontrovertibly high among the vulcanizates with lower oil content, which were 13.57 and 4.49 MPa, respectively. When any consequential change in mechanical properties of styrene–butadiene rubber (SBR)/butadiene rubber (BR) blends could not be observed at different TDAE addition time, increasing amount of oil in blends enhanced elongation at break, and decreased Shore A hardness and tensile strength.

scholarly journals Rheometer Evidences for the Co-Curing Effect of a Bismaleimide in Conjunction with the Accelerated Sulfur on Natural Rubber/Chloroprene Rubber Blends

Polymers ◽  
2021 ◽  
Vol 13 (9) ◽  
pp. 1510
Author(s):  
Marek Pöschl ◽  
Shibulal Gopi Sathi ◽  
Radek Stoček ◽  
Ondřej Kratina
Keyword(s):  
Mechanical Properties ◽  
Natural Rubber ◽  
Tensile Properties ◽  
Crosslinking Agent ◽  
Alder Reaction ◽  
Diels Alder ◽  
Ene Reactions ◽  
Rubber Blends ◽  
Diels Alder Reaction ◽  
Chloroprene Rubber

The rheometer curing curves of neat natural rubber (NR) and neat chloroprene rubber (CR) with maleide F (MF) exhibit considerable crosslinking torque at 180 °C. This indicates that MF can crosslink both these rubbers via Alder-ene reactions. Based on this knowledge, MF has been introduced as a co-crosslinking agent for a 50/50 blend of NR and CR in conjunction with accelerated sulfur. The delta (Δ) torque obtained from the curing curves of a blend with the addition of 1 phr MF was around 62% higher than those without MF. As the content of MF increased to 3 phr, the Δ torque was further raised to 236%. Moreover, the mechanical properties, particularly the tensile strength of the blend with the addition of 1 phr MF in conjunction with the accelerated sulfur, was around 201% higher than the blend without MF. The overall tensile properties of the blends cured with MF were almost retained even after ageing the samples at 70 °C for 72 h. This significant improvement in the curing torque and the tensile properties of the blends indicates that MF can co-crosslink between NR and CR via the Diels–Alder reaction.

scholarly journals Hybrid Silica-Based Fillers in Nanocomposites: Influence of Isotropic/Isotropic and Isotropic/Anisotropic Fillers on Mechanical Properties of Styrene-Butadiene (SBR)-Based Rubber

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2413
Author(s):  
Mariapaola Staropoli ◽  
Vincent Rogé ◽  
Enzo Moretto ◽  
Joffrey Didierjean ◽  
Marc Michel ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Silica Nanoparticles ◽  
Synergetic Effect ◽  
Mechanical Analysis ◽  
Rubber Matrix ◽  
Styrene Butadiene Rubber ◽  
Butadiene Rubber ◽  
Precipitated Silica ◽  
Scanning Transmission ◽  
Styrene Butadiene

The improvement of mechanical properties of polymer-based nanocomposites is usually obtained through a strong polymer–silica interaction. Most often, precipitated silica nanoparticles are used as filler. In this work, we study the synergetic effect occurring between dual silica-based fillers in a styrene-butadiene rubber (SBR)/polybutadiene (PBD) rubber matrix. Precipitated Highly Dispersed Silica (HDS) nanoparticles (10 nm) have been associated with spherical Stöber silica nanoparticles (250 nm) and anisotropic nano-Sepiolite. By imaging filler at nano scale through Scanning Transmission Electron Microscopy, we have shown that anisotropic fillers align only in presence of a critical amount of HDS. The dynamic mechanical analysis of rubber compounds confirms that this alignment leads to a stiffer nanocomposite when compared to Sepiolite alone. On the contrary, spherical 250 nm nanoparticles inhibit percolation network and reduce the nanocomposite stiffness.

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