The Effect of Accelerators on Curing Characteristics and Properties of Natural Rubber/Chlorosulphonated Polyethylene Rubber Blend

Marković, Gordana; Radovanović, Blaga; Marinović‐Cincović, Milena; Budìnski‐Simendìć, Jaroslava

doi:10.1080/10426910902967087

Cited by 29 publications

(25 citation statements)

References 8 publications

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“…Various approaches have been adopted to overcome the cure incompatibility in blends of EPDM with diene rubbers as well as to acquire better filler and curatives distribution in such blends to optimize the blend properties. Those approaches included the use of blend compatibilizers , by using modified EPDM as a third blending component , two‐stage vulcanization, and utilization of different types of accelerators . The latter attempts have been found to have an influence on the mechanical properties of the blends as well.…”

Section: Introductionmentioning

confidence: 99%

Optimization of accelerators on curing characteristics, tensile, and dynamic mechanical properties of (natural rubber)/(recycled ethylene‐propylene‐diene‐monomer) blends

Nabil

Ismail

Azura

2014

Vinyl Additive Technology

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The migration of sulfur from natural rubber (NR) compound to the ground waste ethylene‐propylene‐diene monomer (EPDM) rubber phase may have caused the cure incompatibility between these two rubbers. Optimization of accelerators had been adopted to overcome the cure incompatibility in NR/(R‐EPDM) blends as well as to get increased curative distribution. In this study, blends of NR and R‐EPDM were prepared. The effect of accelerator type on curing characteristics, tensile properties, and dynamic mechanical properties of 70/30/NR/(R‐EPDM) blend was investigated. Four types of commercial accelerators were selected [ie, N‐tert‐butyl‐2‐benzothiazyl‐sulphonamide, N‐cyclohexyl‐benzothiazyl‐sulfenamide (CBS), tetramethylthiuram disulfide, and 2‐mercaptobenzothiazol]. It was found that the tensile strength of the blends cured in the presence of CBS was relatively higher than the other three accelerators. Scanning electron micrographs of CBS‐cured NR/(R‐EPDM) blends exhibited more roughness and cracking path, indicating that higher energy was required toward the fractured surface. The high crosslinking density observed from the swelling method could be verified from the storage modulus (E′) and damping factor (tan δ) where (tetramethylthiuram disulfide)‐cured NR/(R‐EPDM) blends provided a predominant degree of crosslinking followed by N‐tert‐butyl‐2‐benzothiazyl‐sulphonamide, CBS, and 2‐mercaptobenzothiazol, respectively. J. VINYL ADDIT. TECHNOL., 21:79–88, 2015. © 2014 Society of Plastics Engineers

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Section: Introductionmentioning

confidence: 99%

Optimization of accelerators on curing characteristics, tensile, and dynamic mechanical properties of (natural rubber)/(recycled ethylene‐propylene‐diene‐monomer) blends

Nabil

Ismail

Azura

2014

Vinyl Additive Technology

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“…The surface chemistry of carbon black has a significant effect only on the vulcanization behavior of compounds. The chemical or physical interaction between the filler and the rubber is a further important factor in the reinforcing effect [14,15]. Processability and final properties of elastomeric products could be obtained through a series of experiments that vary the ratios of additives and measure the effects over different temperatures and time.…”

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confidence: 99%

The influence of carbon black on curing kinetics and thermal aging of acrylonitrile-butadiene rubber

Jovanović

Budìnski‐Simendìć

Samardzija-Jovanovic

et al. 2009

CI&CEQ

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Elastomers based on a copolymer of butadiene and acrylonitrile (NBR) have excellent oil resistance but are very sensitive for degradation at very high temperatures. The aim of this applicative contribution was to determine the effect of high abrasion furnace carbon black with primary particle size 46 nm on aging properties of elastomeric materials based on NBR as network precursor. The curing kinetics was determined using the rheometer with an oscillating disk, in which the network formation process is registered by the torque variation during time. The vulcanizates were obtained in a hydraulic press at 150 °C. The mechanical properties of elastomeric composites were determined before and after thermal aging in an air circulating oven. The reinforcing effect of the filler particles was assessed according to mechanical properties before and after aging.Elastomers are cross-linked polymers with a low modulus of elasticity and the capability to reverse large deformations at their service temperatures. The low modulus of elastomers, combined with their high deformation reversibility, allows their use in a wider range of applications [1]. For more than a century, elastomer and carbon black (CB) have played a central role in tire technology as active filler. At the onset, the usages of regular industrial soot and natural rubber have opened the way to an industry in the continuous evolution. The rubber industry began when Goodyear developed the first useful rubber compound of natural rubber with sulphur. The concept of mixing materials into rubber to improve performance is still of primary importance today. Without fillers, few rubber goods would be of any commercial value. The curing

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“…The effect of added carbon black is directly related to the properties of the inter phase and due to the specific interactions between rubber macromolecules and active filler surfaces. It is well known that the properties mainly depend on the dispersion condition of filler particles and their principal relevant properties: particle size, surface area, aggregate structure, surface activity and on rubber-filler interactions (27,28). It is obvious that to obtain as many interactions as possible the polymer active segments must have access to the majority of the carbon black active sites.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Filler Particles on the Properties of Elastomeric Materials Based on Different Network Precursors()

Jovanović

Budìnski‐Simendìć

Milić

et al. 2010

ACS Symposium Series

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The incorporation of nanoparticles to rubber compound with subsequent conversion to a network by crosslinking leads to a materials of great complexity. As compared to micron size filler particles the nano size filler particles are able to occupy substantially greater number of sites in the polymer matrix. Selecting proper network precursors for a specific application requires an evaluation of the environment in which it is anticipated to operate and the performance required. Compared to carbon black, silica has two advantages for fundamental investigations: it has a simpler geometry and it can be functionalized in different ways to control its degree of interaction with the polymer (i.e.), compatibility to enhance dispersion and/or mechanical coupling by covalent or non-bonded interactions. In this contribution, studies of elastomers based on ethylene-propylene diene monomer (EPDM) rubber and acrylonitrile butadiene rubber (NBR) have been performed. To enhance the quality of elastomers, an attempt was made to prepare technologically feasible blends comprising non-polar EPDM rubber and NBR with high performance. The properties of elastomeric composites were determined before and after thermal aging in an air circulating oven. The elastomers based on EPDM/NBR (80:20) were reinforced either with high abrasion furnace carbon black (46 nm) or with precipitated silica (22 nm) or its combination. Comparative values of tensile strength before and after weathering were analyzed. It was estimated considerable performance enhancement of rubber blends by reinforcing with dual active fillers.

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The Effect of Accelerators on Curing Characteristics and Properties of Natural Rubber/Chlorosulphonated Polyethylene Rubber Blend

Cited by 29 publications

References 8 publications

Optimization of accelerators on curing characteristics, tensile, and dynamic mechanical properties of (natural rubber)/(recycled ethylene‐propylene‐diene‐monomer) blends

Optimization of accelerators on curing characteristics, tensile, and dynamic mechanical properties of (natural rubber)/(recycled ethylene‐propylene‐diene‐monomer) blends

The influence of carbon black on curing kinetics and thermal aging of acrylonitrile-butadiene rubber

The Effect of Filler Particles on the Properties of Elastomeric Materials Based on Different Network Precursors()

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