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Abstract <p>The effect of NDP-D-400 and NDP-230 diatomites on the rheometric characteristics of a rubber compound and the physical and mechanical, performance, and dynamic properties of vulcanizates based on a combination of general-purpose and special-purpose rubbers was studied. The rubber compound contained SKMS-30ARK butadiene-methylstyrene rubber, SKN-2655 butadiene-nitrile rubber, and SKI-3 <i>cis</i>-isoprene rubber, as well as the following ingredients: the vulcanization accelerator <i>N</i>-cyclohexyl-2-benzothiazolesulfenamide; the vulcanizing agents sulfur, tetramethylthiuram disulfide, and <i>N</i>,<i>N′</i>-dithiodimorpholine; the vulcanization activators zinc oxide and stearic acid; the stabilizers Acetonanil H and <i>N</i>-isopropyl-<i>N′</i>-phenyl-<i>p</i>-phenylenediamine; the dispersant Hepsol HKP; the plasticizer industrial oil I-12A; the scorch retarder <i>N</i>-nitrosodiphenylamine; and the fillers trans-polynorbornene, N220 carbon black, P514 carbon black, Zeosil 1165 MP silica, and diatomites. The rubber compound was prepared on LB 320 160/160 laboratory rolls. Variant 1 contained no diatomites. Variants 2–4 and 5–7 were prepared using NDP-D-400 and NDP-230 diatomites, respectively, in amounts of 5.0, 10.0, and 15.0 parts per hundred parts of rubber (phr) The rheometric characteristics of the rubber compound were studied on an MDR 3000 Basic rheometer at 143°C for 40 min. Standard specimens for determining the physical and mechanical properties were vulcanized at 143°C for 20 min in a P-V-100-3RT-2-PCD vulcanization press. The physical and mechanical and performance properties of the vulcanizates were determined according to standards used in the rubber industry. The dynamic parameters (loss factor and storage modulus) of vulcanizates of different rubber compound variants were studied at 30°C on a Metravib VHF 104 dynamic mechanical analyzer. It was established that rubber compound variants containing 10.0 phr of diatomites exhibited improved processing properties. The vulcanizates of these variants also possessed high strength properties and the smallest changes in these properties upon exposure to aggressive media. Vulcanizates containing NDP-D-400 diatomite exhibited better dynamic properties.</p>

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Study of the Effect of Diatomites on the Properties of Vulcanized Rubber Based on General-Purpose and Special-Purpose Rubbers

  • 期刊论文

  • 发表日期：

    2026年7月1日

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  • E. N. Egorov,
  • N. I. Kol’tsov

摘要

Abstract

The effect of NDP-D-400 and NDP-230 diatomites on the rheometric characteristics of a rubber compound and the physical and mechanical, performance, and dynamic properties of vulcanizates based on a combination of general-purpose and special-purpose rubbers was studied. The rubber compound contained SKMS-30ARK butadiene-methylstyrene rubber, SKN-2655 butadiene-nitrile rubber, and SKI-3 cis-isoprene rubber, as well as the following ingredients: the vulcanization accelerator N-cyclohexyl-2-benzothiazolesulfenamide; the vulcanizing agents sulfur, tetramethylthiuram disulfide, and N,N′-dithiodimorpholine; the vulcanization activators zinc oxide and stearic acid; the stabilizers Acetonanil H and N-isopropyl-N′-phenyl-p-phenylenediamine; the dispersant Hepsol HKP; the plasticizer industrial oil I-12A; the scorch retarder N-nitrosodiphenylamine; and the fillers trans-polynorbornene, N220 carbon black, P514 carbon black, Zeosil 1165 MP silica, and diatomites. The rubber compound was prepared on LB 320 160/160 laboratory rolls. Variant 1 contained no diatomites. Variants 2–4 and 5–7 were prepared using NDP-D-400 and NDP-230 diatomites, respectively, in amounts of 5.0, 10.0, and 15.0 parts per hundred parts of rubber (phr) The rheometric characteristics of the rubber compound were studied on an MDR 3000 Basic rheometer at 143°C for 40 min. Standard specimens for determining the physical and mechanical properties were vulcanized at 143°C for 20 min in a P-V-100-3RT-2-PCD vulcanization press. The physical and mechanical and performance properties of the vulcanizates were determined according to standards used in the rubber industry. The dynamic parameters (loss factor and storage modulus) of vulcanizates of different rubber compound variants were studied at 30°C on a Metravib VHF 104 dynamic mechanical analyzer. It was established that rubber compound variants containing 10.0 phr of diatomites exhibited improved processing properties. The vulcanizates of these variants also possessed high strength properties and the smallest changes in these properties upon exposure to aggressive media. Vulcanizates containing NDP-D-400 diatomite exhibited better dynamic properties.