Abstract
The properties of rubber compounds and vulcanizates made using a compositional curing activator with a low content of zinc oxide were studied in this work. Technological modes of obtaining new curing activator activators in the form of an alloy of zinc oxide with a mixture of fatty acids have been developed. To give a convenient outlet shape, finely dispersed fillers of various types were introduced into the experimental products: silicon dioxide, carbon black, microcellulose, bentonite, shungite. The physicochemical properties of compositional curing activator were studied and it was established that, according to the values of acid and iodine numbers, the experimental products satisfy the regulatory requirements for stearic acid. A comparative analysis of the properties of elastomers of experimental products with widely used as curing activator activators of zinc oxide and stearic acid is carried out. It was found that the use of experimental products improves the processability of the compositions due to their better dispersion in an elastomeric medium. The ratios of the compositional curing activator components are determined, which ensure the optimal complex of vulcanization and physical and mechanical properties of elastomers made on their basis. The effectiveness of the action of composite vulcanization activator in the manufacture of elastomeric products is shown - a reduction in the mixing cycle of experimental compositions by an average of 10% is noted compared to the standard rubber compound. The analysis of the research results confirmed the improvement of technological and vulcanization properties of rubber compounds, resistance to scorching. It is shown that the use of compositional curing activators provides the required level of physical and mechanical properties of rubbers even with a decrease in the content of zinc oxide in the experimental product to 20 wt%, and also improves the dispersion of the components of the rubber compound, having a positive effect on the technological and vulcanization properties of rubber compounds.
Highlights
Композиции по стандартной рецептуре бутадиен-стирольного каучука готовили на лабораторных вальцах с фрикцией 1,00:1,28 и температурой поверхности валков (50±5) °С
The properties of rubber compounds and vulcanizates made using a compositional curing activator with a low content of zinc oxide were studied in this work
The physicochemical properties of compositional curing activator were studied and it was established that, according to the values of acid and iodine numbers, the experimental products satisfy the regulatory requirements for stearic acid
Summary
Исследованы свойства резиновых смесей и вулканизатов, изготовленных с применением композиционного активатора вулканизации (КАВ) с пониженным содержанием оксида цинка. Разработаны технологические режимы получения новых активаторов вулканизации в виде сплава оксида цинка со смесью жирных кислот. Проведен сопоставительный анализ свойств эластомеров опытных продуктов с широко применяемыми в качестве активаторов вулканизации оксидом цинка и стеариновой кислотой. Установлено, что использование опытных продуктов улучшает перерабатываемость композиций благодаря лучшему их диспергированию в эластомерной среде. Определены соотношения компонентов КАВ, обеспечивающие оптимальный комплекс вулканизационных и физико-механических свойств эластомеров, изготовленных на их основе. Что применение композиционных активаторов вулканизации обеспечивает требуемый уровень физико-механических свойств резин даже при снижении содержания в опытном продукте оксида цинка до 20 % мас., а также улучшает диспергирование компонентов резиновой смеси, оказывая положительное влияние на технологические и вулканизационные свойства резиновых смесей. The effect of the compositional curing activator formation on the properties of elastomers
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