Naturally occurring amino acid: Novel curatives for chloroprene rubber

Das, Amit; Naskar, Nityananda; Datta, Raja; Bose, Partha Pratim; Debnath, Subhas Chandra

doi:10.1002/app.23065

Cited by 9 publications

(6 citation statements)

References 12 publications

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“…The ZnO can generate crosslinks between two chloroprene units via a cationic mechanism, and the ETU can crosslink the CR alone and also in combination with ZnO. CR can also be crosslinked with other ingredients such as amino acid derivatives, thiophosphoryl disulfides, and fillers . CR can also be blended with other elastomers to improve properties such as low temperature flexibility and mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of norbornyl modified soybean oil on CB‐filled chloroprene rubber

Isayev

Xue-ping

et al. 2016

J of Applied Polymer Sci

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Carbon black (CB)‐filled chloroprene rubber (CR) compounds and vulcanizates containing naphthenic oil (NO), soybean oil (SO), and two different levels of norbornyl modified soybean oil (MSO) were prepared and investigated. The MSO was prepared through the reaction of SO and dicyclopentadiene (DCPD) at different ratios. Various properties including gel fraction, crosslink density, bound rubber fraction, curing behavior, thermal, mechanical, and aging properties of CB‐filled CR containing different oils were compared. It was observed that the addition of SO and MSO could benefit the dispersion of the filler, lower the glass transition temperature, and increase the thermal stability of the CB‐filled CR/MSO compounds and vulcanizates, and also slightly decrease the crosslink density of the CB‐filled CR/MSO vulcanizates compared to that of the CR/NO vulcanizate. With the increase of the modification level of the MSO, the curing time of the CB‐filled CR/MSO compounds was found to be decreased, the tensile property, tear strength, abrasion resistance, and aging resistance of the CB‐filled CR/MSO vulcanizates were improved compared with those of the CB‐filled CR/NO vulcanizate. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43809.

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Section: Introductionmentioning

confidence: 99%

Effect of norbornyl modified soybean oil on CB‐filled chloroprene rubber

Isayev

Xue-ping

et al. 2016

J of Applied Polymer Sci

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“…Metal oxide‐, thiuram‐, and thiourea‐based curing agents, particularly ethylene thiourea (ETU), are widely used to cure CR 7. Recently, newer curing agents, include thiophosphoryl disulfides, dimethyl l‐cystine, and cetyltrimethylammonium maleate, have been reported 8–10. Although there are many published works on various curing agents for CR, the most practical curing agents are still metal oxides due to the superior mechanical properties of the cured products.…”

Section: Introductionmentioning

confidence: 99%

MgO and ZnO as reinforcing fillers in cured polychloroprene rubber

Chokanandsombat

Sirisinha

2012

J of Applied Polymer Sci

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Polychloroprene rubber (CR) is generally cured in a manner different from that of other diene rubbers. Compounding formulations based on metal oxides have been used satisfactorily for the crosslinking of CR, especially magnesium oxide (MgO) and zinc oxide (ZnO) at loadings of 4 and 5 phr, respectively. In this work, the total loading of MgO and ZnO was varied while the MgO : ZnO loading ratio of 4 : 5 (equivalent to MgO and ZnO volume fractions of 0.013 and 0.009, respectively) that usually used with CR was kept constant. Cure and mechanical properties of CR compounds and cured specimens were investigated. The obtained results could resolve the separate increments in hardness, tensile strength, abrasion resistance, and modulus associated with the increases in crosslink density and total loading of metal oxides. Furthermore, poor compression set and increased heat build-up of cured CR specimens, particularly at high total loading of metal oxides, were believed to be the result of a post-curing effect and of molecular restriction by the increased crosslink density, respectively.

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“…The mechanism proposed by Vukov based on the theory of Kuntz et al using model compounds is considered as the most appropriate mechanism for the crosslinking of CR with ZnO [16,17]. Apart from ZnO or ETU, other chemicals such as, tribasic lead sulphate; thiophosphoryl disulfides; dimethyl L-cystine; and cetyltrimethylammonium maleate (CTMAM) have also been used as curing agents for CR [18][19][20][21]. Recently, Dziemid-kiewicz et al have used certain metal acetylacetonate as pro-ecological crosslinking agents for CR based on the Heck coupling reaction [22].…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2021

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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.

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Naturally occurring amino acid: Novel curatives for chloroprene rubber

Cited by 9 publications

References 12 publications

Effect of norbornyl modified soybean oil on CB‐filled chloroprene rubber

Effect of norbornyl modified soybean oil on CB‐filled chloroprene rubber

MgO and ZnO as reinforcing fillers in cured polychloroprene rubber

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

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