Technological features of reactive dynamic extrusion of nanocomposites based on polyolefins, aluminum and technical carbon

The effect of the concentration of aluminum powder and technical carbon nanoparticles on the main physical and mechanical properties of nanocomposites based on high density polyethylene, low density polyethylene and an ethylene-hexene copolymer is considered. The optimal technological parameters of the reaction extrusion of nanocomposites vulcanized with sulfur and dicumyl peroxide have been determined. The influence of the type of polyolefin, fillers and crosslinking agents on the formation of isotropic nanocomposites during the production of sheet products has been investigated.

CARBON AND FUEL FROM RUBBER WASTE

The results of studies of thermolysis waste in the environment of overheated water vapor are presented. It is shown that as a result of fractionation from liquid waste thermolysis products, gasoline and diesel fuel fractions can be obtained. It is proposed to use a composite mixture of liquid and solid waste thermolysis products as raw materials for high-grade technical carbon. Studies have shown that high-grade technical carbon can be obtained as raw materials using a composite mixture of rubber waste thermolysis products as raw materials. The technological line of obtaining technical carbon from the products of thermolysis of worn tires is described. Analysis of the ash produced by the process of burning the composite mixture shows that it contains compounds of iron, zinc and silicon. Therefore, this ash is of interest as a high-quality raw material for the production of zinc oxide, as one of the main ingredients of rubber mixtures.

Study of the Impact Viscosity of the Epoxy Composite Modified Technical Carbon

This article discusses effect of filler concentration on impact strength of an epoxy resin composite. The optimal ratio of resin and hardener is defined. Research of the effect of the concentration of the filler - carbon black P505 on the impact strength of a composite material based on epoxy resin ED-20 is made. According to the results of the study, it is shown that with an increase of concentration of the filler from P505 carbon black, the toughness decreases. Fractographic studies of the fracture surfaces of composites were also carried out, which indicate that the introduction of a filler leads to a decrease in the surface energy of destruction. Thus, studies of epoxy composite modified with technical carbon grade P505 showed a decrease in impact strength up to 4 times, depending on the increase in the mass fraction of the filler.

Activation of carbon tow electrodes for use in iron aqueous redox systems for electrochemical applications

Activation of technical carbon tow opens access to new electrode material and electrode design for all iron redox flow cells.

TECHNICAL CARBON FOR MODIFICATION OF THE STRUCTURE AND PROPERTIES OF THE GYPSUM BINDER

В работе приведены результаты исследований структуры и свойств гипсового вяжущего, модифицированного ультрадисперсной технической сажей. Показано, что введение в состав гипсового вяжущего технического углерода в виде колеровочной пасты приводит к изменению морфологии кристаллогидратов двуводного сульфата кальция, уплотнению структуры гипсовой матрицы и, как следствие, к повышению прочности затвердевшего гипсового вяжущего. Показано, что дисперсность частиц сажи в составе колеровочной пасты зависит от ее возраста. Проведено физическое моделирование твердения гипсового вяжущего с добавкой дисперсии сажи, которое позволило установить, что кристаллизация гипсового вяжущего происходит из центров кристаллизации, в качестве которых выступают частицы технического углерода. При этом существенно меняется морфология кристаллогидратов двуводного гипса с переходом ее из игольчатой к пластинчатой с повышенной плотностью структуры. С использованием растровой электронной микроскопии в сочетании с рентгеновским микроанализом и ИК-спектрального анализа обосновано изменение физико-механических характеристик гипсового вяжущего. Отмечается, достигнутые эффекты по степени модификации структуры гипсовой матрицы сопоставимы с результатами, получаемыми при модификации гипсового вяжущего дисперсиями углеродных нанотрубок, но при этом стоимость технической сажи существенно ниже стоимости углеродных нанотрубок.

The investigation influence of high carbon technical filler on the properties of the plantar rubber

The article investigates the influence of the high-carbon technical filler of the RP-CARBON series of three brands RP-C 100, RP-C 150 and RP-C 200, differing in the size of microparticles, on the properties of the rubber mixture which used for the manufacture of rubber shoe soles. The investigation influence of replacement of technical carbon grades TU N 330 and TU P 803 on high-carbon technical filler in the plantar rubber compound based on the combination of SKI-3 and SKMS-30ARKM-15 caoutchoucs has been investigated. The rubber mixture contained caoutchoucs, vulcanizing agent sulfur, vulcanization accelerators thiazole 2 MBS and guanid F, vulcanization activators zinc oxide and stearic acid, antioxidant naphtham-2; plasticizers rosin and industrial oil I-8A; chalk fillers and carbon blacks of grades TU N 330 and TU P 803. The plasto-elastic, rheometric properties of the rubber mixture and the physicomechanical properties of vulcanizates, as well as the change of these properties after thermal aging of vulcanizates in air were studied. It was established that with replacement of technical carbon grades TU N 330 and TU P 803 with high-carbon technical filler, the plantar rubber mixture has satisfactory technological, physicomechanical and operational properties. Rubber mixture containing 11 weith parts high-carbon technical filler brand RP-C 100 instead of carbon black TU P 803, characterized by improved technological properties during calendering and can be recommended for the manufacture of sole rubber based on non-polar rubbers.