Influence of Chlorobutyl Caoutchouc on the Dynamic Properties of a Rubber Based on General-Purpose Caoutchoucs

• Published in: Russian journal of general chemistry Vol. 92; no. 9; pp. 1862 - 1865
• Main Authors: Ushmarin, N. F., Egorov, E. N., Grigor’ev, V. S., Sandalov, S. I., Kol’tsov, N. I.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.09.2022; Springer; Springer Nature B.V
• Subjects: Butadiene; Carbon black; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Crosslinked polymers; Dynamic characteristics; Elastic properties; Elasticity; Isoprene; Mixtures; Phenylenediamine; Phthalimides; Polynorbornene; Rheometry; Room temperature; Rosin; Rubber; Rubber industry; Rubber, Artificial; Sound transmission; Stearic acid; Strain rate; Sulfur compounds; Vulcanization; Zinc oxide; methylstyrene-butadiene and isoprene caoutchoucs; stress-strain; plasto-elastic; rheometric; chlorobutyl caoutchouc; rubber; and dynamic properties
• ISSN: 1070-3632; 1608-3350
• DOI: 10.1134/S1070363222090298

The influence of KhBK-139 chlorobutyl caoutchouc on the plasto-elastic, rheometric properties of the rubber mixture, as well as on the physicomechanical and dynamic characteristics of the rubber based on SKMS-30ARK methylstyrene-butadiene and SKI-3 isoprene caoutchoucs was examined. The rubber mixture based on SKMS-30ARK and SKI-3 caoutchoucs contained sulfur, 2,2′-dibenzthiazolyl disulfide, Guanid F, zinc oxide, stearic acid, N -isopropyl- N ′-phenyl- p -phenylenediamine, N -(cyclohexylthio)phthalimide, rosin, industrial oil I-12A, carbon black P 324, and trans-polynorbornene. The rubber mixture was prepared on LB 320 160/160 laboratory rolls. The plasto-elastic properties of the rubber mixture were studied on a MonTech MV 3000 Basic viscometer at 120°C. The vulcanization data for the rubber mixture were examined on a MonTech MDR 3000 Basic rheometer at 150°C for 30 min in accordance with ASTM D2084-79. Standard samples for determining the physicomechanical properties were vulcanized at a temperature of 150°C for 30 min in a P-V-100-3RT-2-PCD vulcanizing press. The main characteristics of the vulcanizates were determined according to the standards applicable in the rubber industry. The dynamic parameters (elasticity modulus and tangent of the mechanical loss angle) of the vulcanizates of various variants of the rubber mixture were studied at room temperature on a Metravib VHF 104 dynamic mechanical analyzer at a strain rate of 0.01% and a vibration frequency of 1000 Hz. It was shown that the vulcanizates combining all the three caoutchoucs are characterized by satisfactory stress-strain properties. Partial replacement of SKMS-30 ARK and SKI-3 caoutchoucs by KhBK-139 chlorobutyl caoutchouc leads to increases in the elasticity modulus and the tangent of mechanical loss angle of the rubber. The rubber containing SKMS-30ARK 50.00, SKI-3 20.00, and KhBK-139 30.00 parts by weight exhibits the best sound-absorbing properties.