Modification of nitrile butadiene rubber at the stage of its allocation
https://doi.org/10.20914/2310-1202-2018-3-323-329
Abstract
Search for additives that increase the wear resistance of rubbers is relevant. It is known that the introduction of hollow corundum microspheres (NCM) into rubber reduces the wear of rubber products. The uniform distribution of small amounts of microspheres in rubber by traditional "dry" mixing in a rubber mixer or on rollers is difficult. Microspheres were introduced into rubber at the stage of its separation from latex. The work consisted in the selection of thickeners capable of holding the NSM in rubber latex SCN-18SNT at the stage of its coagulation, and evaluation of physical and mechanical properties of rubbers in the presence of NCM. The retention capacity of thickeners of polyacrylamide (PAA), carboxymethylcellulose (CMC) and polyvinyl alcohol (PVA) was determined. Thickened latex was coagulated in the presence of microspheres with polymeric coagulant and sulfuric acid. When filling the polymer with microspheres, it is preferable to use a PAA thickener. The yield of microspheres in rubber using thickeners PAA, CMC and PVA was 71.1, 66.5 and 38.7% , respectively. The physico-mechanical characteristics of rubbers based on SKN-18SNT in the presence of microspheres introduced both as a "dry" method in rubber and at the stage of its isolation from latex are determined. The presence of microspheres in an amount of 4.4-4.7% by weight. on rubber, did not affect the hardness and elasticity of rebound rubbers. It has been confirmed that the presence of microspheres, especially those introduced from the latex rubber release stage, provides an increase in abrasion resistance. In turn, the presence of microspheres in rubber with traces of polyacrylamide provided an increase in the resistance of rubbers to tearing, the modulus at 100 and 200% elongation with a decrease in the elongation at break.
About the Authors
V. A. Sedykh
Voronezh state university of engineering technologies
Cand, Sci. (Engin.), associate professor, chemistry and chemical technology of organic compounds and polymer processing department, Revolution Av., 19 Voronezh, Russia
Cand, Sci. (Engin.), associate professor, chemistry and chemical technology of organic compounds and polymer processing department, Revolution Av., 19 Voronezh, Russia
O. V. Karmanova
Voronezh state university of engineering technologies
Dr. Sci. (Engin.), professor, chemistry and chemical technology of organic compounds and polymer processing department, Revolution Av., 19 Voronezh, Russia
Dr. Sci. (Engin.), professor, chemistry and chemical technology of organic compounds and polymer processing department, Revolution Av., 19 Voronezh, Russia
E. V. Koroleva
Voronezh state university of engineering technologies
graduate student, chemistry and chemical technology of organic compounds and polymer processing department, Revolution Av., 19 Voronezh, Russia
graduate student, chemistry and chemical technology of organic compounds and polymer processing department, Revolution Av., 19 Voronezh, Russia
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For citations:
Sedykh V.A., Karmanova O.V., Koroleva E.V. Modification of nitrile butadiene rubber at the stage of its allocation. Proceedings of the Voronezh State University of Engineering Technologies. 2018;80(3):323-329. (In Russ.) https://doi.org/10.20914/2310-1202-2018-3-323-329
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