Study to enhance the mechanical properties of natural rubber by using the carbon black (N550)

Sivaselvi, K.; Gopal, Kandasamy

doi:10.1016/j.matpr.2019.12.059

Cited by 8 publications

(7 citation statements)

References 5 publications

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“…Mechanical and thermal properties of NR are very crucial for its applications, especially when NR products are often exposed under real environmental conditions, including sunlight, UV radiation, and high temperature 23,24 . Therefore, it is necessary to improve NR's mechanical properties, as well as its thermal stability, to widen its practical application.…”

Section: Introductionmentioning

confidence: 99%

Improvement of thermal properties of Vietnam deproteinized natural rubber via graft copolymerization with styrene/acrylonitrile and diimide transfer hydrogenation

Duy

Rimdusit

Quang

et al. 2020

Polymers for Advanced Techs

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In this study, we investigated the improvement of thermal properties of Vietnam deproteinized natural rubber (DPNR) via graft copolymerization of styrene/acrylonitrile and transfer hydrogenation. The graft copolymerization was achieved successfully in the latex stage using tert‐butyl hydroperoxide and tetraethylenepentamine as radical initiators at 30°C. The obtained graft copolymer was hydrogenated by a diimide reduction system in the presence of different copper (II) homogeneous catalysts. The effects of styrene to acrylonitrile on the total conversion and the grafting efficiency have been studied. The structural characterization of the obtained copolymers was made by 1H NMR and ATR‐FTIR. The graft DPNR was then characterized by gel permeation chromatography (GPC). The effects of different copper (II) catalysts on the system have been evaluated by the hydrogenation degree of each hydrogenated sample. The improvement of the thermal properties of the graft copolymers was confirmed by thermal gravimetric analysis/differential thermal analysis. The core‐shell arrangement was obtained in both DPNR‐graft‐PS/PAN and hydrogenated‐DPNR‐graft‐PS/PAN by transmission electron microscopy.

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Section: Introductionmentioning

confidence: 99%

Improvement of thermal properties of Vietnam deproteinized natural rubber via graft copolymerization with styrene/acrylonitrile and diimide transfer hydrogenation

Duy

Rimdusit

Quang

et al. 2020

Polymers for Advanced Techs

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“…Tear strength is a property commonly associated with the sudden failure of a rubber product as a result of crack propagation. In dynamic sealing applications, low tear strength is also related to lower abrasion resistance, which can lead to premature wear and early failure of the sealing element 49,50 . As shown in Figure 5B, the tear strength significantly increases as CB and RW are added to NBR.…”

Section: Resultsmentioning

confidence: 99%

“…In dynamic sealing applications, low tear strength is also related to lower abrasion resistance, which can lead to premature wear and early failure of the sealing element. 49,50 As shown in Figure 5B, the tear strength significantly increases as CB and RW are added to NBR. For instance, while the tear strength of unfilled NBR is 14-16 kN m À1 , the corresponding value for a composite containing 20 phr of CB and 20 phr of RW is 28-30 kN m À1 , which is an increase of around 90%.…”

Section: Shore a Hardness Tear Strength And Resiliencementioning

confidence: 91%

Advantages of using a dual‐filler system with carbon black and rockwool fiber on Nitrile Rubber composites from a technical standpoint

da Rocha,

de Sousa,

Furtado

2024

Polymer Composites

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This study produced and characterized composites based on nitrile rubber reinforced with rockwool fiber (RW) and carbon black (CB). Ten formulations with dual‐filler loading amounts ranging from 0 to 40 phr of CB and RW were designed using a simplex‐centroid mixture. The composites were assessed regarding their rheometric, rheological, mechanical, and thermal properties. The use of the RW in the dual‐filler system contributed to overall improvements in Shore A hardness, tear strength, modulus at 50%, and resilience, as well as reducing the Payne effect. Instead of using 40 phr of CB alone, a dual‐filler system comprising 20 phr of CB and 20 phr of RW lowers the Payne effect by around 60%, improves resilience by 35%, modulus at 50% strain by 8%, and the residual stress at equilibrium (σ∞/σ0) by 7%. On the other hand, the tensile strength is reduced by 23%. The optimum cure time, crosslink density, and maximum decomposition rate temperature were not affected by the rockwool's presence in the dual‐filler system. In general, the use of RW in combination with CB is advantageous mainly because it reduces compressive stress relaxation, which is an important property for sealing applications.Highlights Dual‐filler systems based on carbon black (CB) and rockwool fiber (RW) offer advantages. RW‐rich dual‐filler systems reduce stress relaxation. RW‐rich dual‐filler systems reduce the Payne effect. CB‐rich dual‐filler systems increase tensile strength.

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“…A lower cure time means a higher cure rate (Surya et al, 2018). CRI is calculated as follow (Sivaselvi & Gopal, 2020):…”

Section: Unvulcanized Rubber Cure Characteristicmentioning

confidence: 99%

Study of rheological characteristics and mechanical strength properties of natural rubber vulcanizates varying the type and content of carbon black

Kherbouche,

Benidir,

Bezzazi

2023

JART

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This paper presents a study about the influence of the size and content of two types of carbon black N220 and N550 with loading of 10–100 phr on the properties of the vulcanized natural rubber (NR).The mechanical characteristics such as the tensile strength, the tensile modulus, the elongation at break, the hardness, the abrasion resistance, and rheological properties of NR reinforced with carbon black were investigated. By analyzing the results of an N220 reinforced NR, the reinforcement gives improvement in tensile strengths when fillers are added up to 70 phr. However, and by referring of elongation at break, a fall of product elasticity is observed. . The increase of filler loading results a decrease in rheological properties; optimum cure time, scorch time, cure rate index (CRI). Furthermore, the increase of the filler loading leads to the increase in hardness for all the compounds. Compared the reinforcing ability of carbon black N220 scarcely inferior to carbon black N550.However, it seems that the rubber compound filled N220 or N550 gives comparable results on mechanical properties.

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Study to enhance the mechanical properties of natural rubber by using the carbon black (N550)

Cited by 8 publications

References 5 publications

Improvement of thermal properties of Vietnam deproteinized natural rubber via graft copolymerization with styrene/acrylonitrile and diimide transfer hydrogenation

Improvement of thermal properties of Vietnam deproteinized natural rubber via graft copolymerization with styrene/acrylonitrile and diimide transfer hydrogenation

Advantages of using a dual‐filler system with carbon black and rockwool fiber on Nitrile Rubber composites from a technical standpoint

Study of rheological characteristics and mechanical strength properties of natural rubber vulcanizates varying the type and content of carbon black

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