Properties of Natural Rubber/Recycled Chloroprene Rubber Blend: Effects of Blend Ratio and Matrix

Salleh, Siti Zuliana; Ahmad, Megat Mohamad Hamdan Megat; Ismail, Hanafi

doi:10.1016/j.proche.2016.03.022

Cited by 29 publications

(14 citation statements)

References 12 publications

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“…A few reports describe blends of CR with other rubber, such as natural rubber (NR) [10,11], hydrogenated acrylonitrile-butadiene rubber (HNBR) [12,13], styrene-butadiene rubber [14], butadiene rubber (BR) [15,16] or chlorosulfonated polyethylene (CSM) [17] have been published thus far. The Salleh et al [11] investigated two types of blends containing the natural rubber and chloroprene rubber or epoxidized natural rubber and chloroprene rubber. These blends were cross-linked with sulfur (S) in the presence of tetramethylthiuram monosulfide (TMTM), N-cyclohexyl2-benzothiazylsulfonamide (CBS), zinc oxide (ZnO) and magnesium oxide (MgO).…”

Section: Introductionmentioning

confidence: 99%

The effect of metal oxide on the cure, morphology, thermal and mechanical characteristics of chloroprene and butadiene rubber blends

2019

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This paper discusses the role of metal oxides (MeO) in the cross-linking process and useful properties of chloroprene and butadiene rubber (CR/BR) blends. Iron(III) oxide (Fe 2 O 3), iron(II,III) oxide (Fe 3 O 4), silver(I) oxide (Ag 2 O) or zinc oxide were used. It has found that every proposed metal oxide can be used as a cross-linking agent of the CR/BR blends. The degree of cross-linking was evaluated by means of vulcametric parameters, equilibrium swelling in selected solvents and Mooney-Rivlin elasticity constants. The properties of the cured CR/BR products, such as tensile strength, stress at elongation, tension set under constant elongation and compression set, were also investigated. The results revealed that all CR/BR/MeO vulcanizates were characterized by a high cross-linking degree and satisfying mechanical properties. The most important advantage of obtained rubber goods is very high resistance to flame. The increase in the oxygen index value for the CR/BR/Fe 2 O 3 , CR/BR/ Fe 3 O 4 and CR/BR/Ag 2 O vulcanizates compared to the standard cross-linked chloroprene rubber showed that presented metal oxides provided a positive effect on the resistance to flame of the new CR/BR/MeO composites. Satisfactory properties of the studied blends are related to the presence of the interelastomer bonding of both rubbers in the compositions.

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Section: Introductionmentioning

confidence: 99%

The effect of metal oxide on the cure, morphology, thermal and mechanical characteristics of chloroprene and butadiene rubber blends

2019

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“…The higher values of maximum torque show higher stiffness at the end of the vulcanization [15]. The lower M L value for SiO 2 filled rubber blends indicates the better processability of this formulation compared to ZnO/SiO 2 filled rubber blends [16]. 3.3.…”

Section: Rheological Characteristicsmentioning

confidence: 94%

ZnO Nanoparticles Bonded to SiO₂ Filler as a Curing Accelerator in Cold Vulcanizing Adhesives

2017

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The aim of this study is to investigate the interaction of ZnO/SiO2 particles between the chloroprene rubber and its effect on the cure characteristics and mechanical properties of the cold vulcanizing adhesives. Curing efficiency and mechanical properties of ZnO/SiO2 filled adhesives were compared with SiO2 filled adhesives. ZnO nanoparticles were bounded to SiO2 spherical nanoparticles by hydrolysis and condensation process. The morphology and elemental content of ZnO/SiO2 particles were investigated by scanning electron microscopy and energy dispersive spectroscopy. The ZnO/SiO2 particles were then blended with chloroprene rubber as accelerator during the vulcanization process. Cure characteristics, which are scorch time (ts2), cure time (tc90), maximum torque (MH ) and minimum torque (ML) of the rubber compounds were determined at 190• C with a moving die rheometer. The fabric conveyor belt was used for measuring adhesive strength of the adhesives. The fabric conveyor belt was used for measuring adhesive strength of the adhesives. Application of the cold vulcanizing adhesives to the fabric conveyor belt was carried out at three different times (4, 8, and 24 h), 25• C temperature and 0.3 kg/cm 2 pressure. The results showed that ZnO/SiO2 particles provided a higher adhesive strength than silica in the 4, 8, and 24 h of adhesion. ZnO/SiO2 filled rubber blends gained superior vulcanization characteristics by the increasing cure rate index with the reducing cure time and scorch time. It has been concluded that ZnO/SiO2 particles can be used as a new curing accelerator and simultaneously reinforcing filler.

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“…However, the CR has low compatibility in the NR matrix, which results in lower mechanical properties of blended rubbers in comparison with pristine rubbers. Many works have been carried out on the compatibility and properties of NR/CR blends, such as network structure and stress relaxation [3] and mechanical properties [4,5] on vulcanization characteristics [5,6]. Zlata Harnjak-Murgie's group evaluated the change in network density of NR mixtures with various accelerators during heat aging [7].…”

Section: Introductionmentioning

confidence: 99%

Detailed Study on the Mechanical Properties and Activation Energy of Natural Rubber/Chloroprene Rubber Blends during Aging Processes

Trong

Viet

Linh

et al. 2020

Journal of Chemistry

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Selection of a suitable thermal aging process could render desirable mechanical properties of the rubbers or blended rubbers. In this work, the effect of the aging processes on the mechanical properties and activation energies of natural rubbers (NR) and NR/chloroprene rubbers (CR) blends with low CR contents (5–10%) was investigated. Three aging processes including heat aging (at 110°C for 22 hours), mechanical aging (under dynamic loading to 140% strain for 16000 cycles), and complex aging (heat and mechanical aging) were studied. The results revealed that the compatibility of CR in natural rubber matrix had a significant effect on the dynamic properties of the blended rubber and negligible effect on the static properties. The changes in activation energies of the blended rubber during aging processes were calculated using Arrhenius relation. The calculated changes (ΔUc, ΔUd, and ΔUT) in activation energies were consistent with the results of mechanical properties of the blended rubber. Interestingly, the change in activation energies using complex aging conditions (ΔUc) was mostly equal to the total changes in activation energies calculated separately from heat aging (ΔUT) and mechanical aging (ΔUd) conditions. This indicates that, in complex aging conditions, the heat and dynamic loading factors act independently on the properties of the blended rubber.

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Properties of Natural Rubber/Recycled Chloroprene Rubber Blend: Effects of Blend Ratio and Matrix

Cited by 29 publications

References 12 publications

The effect of metal oxide on the cure, morphology, thermal and mechanical characteristics of chloroprene and butadiene rubber blends

The effect of metal oxide on the cure, morphology, thermal and mechanical characteristics of chloroprene and butadiene rubber blends

ZnO Nanoparticles Bonded to SiO₂ Filler as a Curing Accelerator in Cold Vulcanizing Adhesives

Detailed Study on the Mechanical Properties and Activation Energy of Natural Rubber/Chloroprene Rubber Blends during Aging Processes

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Properties of Natural Rubber/Recycled Chloroprene Rubber Blend: Effects of Blend Ratio and Matrix

Cited by 29 publications

References 12 publications

The effect of metal oxide on the cure, morphology, thermal and mechanical characteristics of chloroprene and butadiene rubber blends

The effect of metal oxide on the cure, morphology, thermal and mechanical characteristics of chloroprene and butadiene rubber blends

ZnO Nanoparticles Bonded to SiO2 Filler as a Curing Accelerator in Cold Vulcanizing Adhesives

Detailed Study on the Mechanical Properties and Activation Energy of Natural Rubber/Chloroprene Rubber Blends during Aging Processes

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ZnO Nanoparticles Bonded to SiO₂ Filler as a Curing Accelerator in Cold Vulcanizing Adhesives