Rubber Products Condom Vulcanization Active Agent Accelerator Sdbc
Rubber Products Condom Vulcanization Active Agent Accelerator Sdbc
Rubber Products Condom Vulcanization Active Agent Accelerator Sdbc
Rubber Products Condom Vulcanization Active Agent Accelerator Sdbc
Rubber Products Condom Vulcanization Active Agent Accelerator Sdbc
design strategy for vulcanization accelerator of ... - research

Design Strategy for Vulcanization Accelerator of ... - Research

Vulcanization is an essential process to obtain high-performance rubber products. Diphenylguanidine (DPG) is often used as the secondary accelerator in the vulcanization process of natural rubber (NR) latex. However, DPG would make NR latex emulsion exhibit gelation, resulting in the negative vulcanization efficiency.

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influencing factors for vulcanization induction period of accelerator

Influencing factors for vulcanization induction period of accelerator

The formation of active vulcanizing agent is an important step in the vulcanization induction period of sulfonamides, which has been confirmed by thermal analysis. The chemistry reactivity of accelerator and the dispersibility of accelerator in rubber composites may be the potential factors affecting the vulcanization induction period.

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influencing factors for vulcanization induction period of accelerator

Influencing factors for vulcanization induction period of accelerator

Generally, it is believed that in the presence of active agents such as zinc oxide and stearic acid, the reaction during the vulcanization induction period can be divided into two periods. The first step is the accelerator break down and reaction with zinc oxide to form zinc salts complex, and the second step is the zinc salts complex open the sulfur ring to form an active vulcanizing agent

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design strategy for vulcanization accelerator of diphenylguanidine

Design Strategy for Vulcanization Accelerator of Diphenylguanidine

ture requirements [12, 13]. The vulcanization accelerator interacts with the active agent in the vulcanization system under heating conditions, so as to promote the ring-opening reactions of sulfur molecules, accelerating the crosslinking speed of rubber molecular chains, to form a three-dimensional network structure fast, which is the

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(pdf) zinc-based curing activators: new trends for reducing zinc

(PDF) Zinc-Based Curing Activators: New Trends for Reducing Zinc

Thus, over the last few years, th e reduction of zinc content in tires and vulcanized rubber products has become an important issue [25] fro m the environmental point of view, in order to avoid

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the influence of curing systems on the cure characteristics

The Influence of Curing Systems on the Cure Characteristics

Therefore, in this work, a new additive for rubber compounds, namely, Activ8, was applied as an additional activator and accelerator for the sulfur vulcanization of styrene¨Cbutadiene elastomer (SBR) in order to increase the efficiency of the vulcanization and to reduce the content of zinc oxide in rubber compounds cured in the presence of MBT or 1,3-diphenylguanidine (DPG) as a primary

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mechanism of the zinc dithiocarbamate-activated rubber vulcanization

Mechanism of the Zinc Dithiocarbamate-Activated Rubber Vulcanization

To elucidate the mechanism of sulfur vulcanization of butadiene-styrene rubber by zinc dithiocarbamate (ZDMC), the density functional theory method was used to investigate the nature of the vulcanization induction and vulcanization periods of the rubber vulcanization process mediated by ZDMC. A mechanism for the sulfur pyrolysis by bimolecular ZDMC during the vulcanization induction period is

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a functional modified graphene oxide/nanodiamond/nano zinc oxide

A functional modified graphene oxide/nanodiamond/nano zinc oxide

Bismark et al. found that reduced GO (rGO) can effectively promote the vulcanization of acrylonitrile-butadiene rubber, because the rGO can be dispersed well in the rubber matrix. 23 Wu et al. investigated the effect of graphene addition on the vulcanization kinetics of natural rubber and found that the scorching period was shortened in the presence of graphene and the vulcanization rate was

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a functional modified graphene oxide/nanodiamond/nano zinc oxide

A functional modified graphene oxide/nanodiamond/nano zinc oxide

rubber vulcanization technology.1¨C3 Coran pointed out that scorching is an important part of rubber vulcanization behavior. In this process,4 various accelerants react with sulfur to form crosslinking precursors, which then react with active sites on the rubber chain during vulcanization to form S bonds between macromolecular chains.

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organic zinc salts as pro-ecological activators for sulfur

Organic Zinc Salts as Pro-Ecological Activators for Sulfur

According to the generally accepted mechanism of sulfur vulcanization, zinc cations from ZnO react with accelerators, forming active zinc-accelerator complexes, which are believed to be more reactive than free accelerators [1,11,12]. In order to increase the activity of ZnO at this step of vulcanization, the availability of zinc ions for reaction with the accelerator should be increased.

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