in this work, leather fibers were employed as a component of elastomeric compounds based on nbr, cr and epdm and studied were made on their effects upon curing characteristics and mechanical properties of the prepared compounds. evaluation of curing characteristics of the compounds demonstrated that leather fibers have no considerable effect on initial viscosity and curing time of the compounds...

For sustainable application of chloroprene rubber (CR), a new technology is developed by the vulcanization CR using 2,2’-dithiodipyridine (DPD) as cross-linking agent with reprocessing performance owing to disulfide metathesis. When DPD was incorporated into vulcanization, Menschutkin reaction between allyl chloride group and pyridine occurred maximum exothermic peak at 184°C. The number effect...

Inverse vulcanization is a potential route to the use of large excesses elemental sulfur, creating high-sulfur-content polymers with many applications. The addition metal diethyldithiocarbamate catalyst was previously found bring several benefits inverse vulcanization, making process more attractive industrially. Herein reported establishment and exploration library catalysts for vulcanization....

2-Mercaptobenzothiazole, which is mainly used in the rubber industry as a vulcanization accelerator, is very toxic and is considered to be recalcitrant. We show here for the first time that it can be biotransformed and partially mineralized by a pure-culture bacterial strain of Rhodococcus rhodochrous. Three metabolites, among four detected, were identified.

RATIONALE Sulfur-vulcanized rubber is a three-dimensional polymer network, insoluble in all organic solvents. For this reason, vulcanization products are difficult to study and identify by conventional analytical techniques. To simplify this task, low molecular weight olefins have been used as model compounds (MCs) in place of rubber in vulcanization experiments. METHODS In this work, the vul...

Rubber is composed of long stringlike polymer molecules, which are pinned together at random points by crosslinks. As the density of crosslinks is increased, the molecules get localized and the system undergoes a phase transition from a liquid to an amorphous solid state. The elastic properties of the resulting solid are very different from those of metals, and are primarily due to changes in t...

ABSTRACT At final parameters and characteristics of tyre can influence several basic elements – tyre composition, sort of used fillers, caoutchouc, reinforcing materials, their construction, choice of curing process, process of stabilization, storage conditions and so on. Nowadays by motorizing development are producers specialized for tire properties parameterize. This fact is necessary to sat...

The purpose of this work is to study the interaction croton fraction with amides – urea and thiourea develop technologies for obtaining accelerators vulcanization rubbers rubber industry.