基于苯乙烯-丁二烯橡胶、乙烯-丙烯-二烯单体橡胶及其组合的混合物的硫磺和过氧化物硫化工艺

Materials Pub Date : 2024-06-03 DOI:10.3390/ma17112718
J. Kruželák, Andrea Kvasničáková, Michaela Džuganová, Jan Hanzlik, M. Bednarik, I. Chodák, I. Hudeč
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引用次数: 0

摘要

以丁苯橡胶、乙烯-丙烯-二烯单体橡胶以及这两种橡胶的组合为基础的橡胶混合物采用不同的硫磺和过氧化物硫化体系进行硫化。在硫磺硫化体系中,使用了两种促进剂,即二硫化四甲基秋兰姆、N-环己基-2-苯并噻唑亚磺酰胺以及两种促进剂的组合。在过氧化物固化体系中,分别使用了过氧化二异丙苯以及过氧化二异丙苯与二丙烯酸锌或二甲基丙烯酸锌的组合。这项工作旨在研究硫化体系的组成以及橡胶类型或橡胶组合对硫化胶的硫化过程、交联密度和物理机械性能的影响。此外,还考察了所选硫化胶的动态机械性能。结果显示,交联密度与物理机械性能之间存在相关性。同样,交联度与玻璃化转变温度之间也存在一定的相关性。与基于纯橡胶的硫化胶相比,基于橡胶组合的硫化胶的拉伸强度更高,这说明在橡胶组合中,不仅结合了两种弹性体的特点,还能改善拉伸特性。与使用过氧化二异丙苯固化的硫化胶相比,使用硫磺体系固化的材料具有更高的拉伸强度。在过氧化物硫化过程中使用助剂后,硫硫化硫化胶的拉伸强度超过了硫硫化硫化胶的拉伸强度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Sulfur and Peroxide Vulcanization of the Blends Based on Styrene–Butadiene Rubber, Ethylene–Propylene–Diene Monomer Rubber and Their Combinations
Rubber blends based on styrene–butadiene rubber, ethylene–propylene–diene monomer rubber and a combination of both rubbers were cured with different sulfur and peroxide curing systems. In sulfur curing systems, two type of accelerators, namely tetramethylthiuram disulfide, N-cyclohexyl-2-benzothiazole sulfenamide, and combinations of both accelerators were used. In peroxide curing systems, dicumyl peroxide, and a combination of dicumyl peroxide with zinc diacrylate or zinc dimethacrylate, respectively, were applied. The work was aimed at investigating the effect of curing systems composition as well as the type of rubber or rubber combinations on the curing process, cross-link density and physical–mechanical properties of vulcanizates. The dynamic mechanical properties of the selected vulcanizates were examined too. The results revealed a correlation between the cross-link density and physical–mechanical properties. Similarly, there was a certain correlation between the cross-linking degree and glass transition temperature. The tensile strength of vulcanizates based on rubber combinations was higher when compared to that based on pure rubbers, which points out the fact that in rubber combinations, not only are the features of both elastomers combined, but improvement in the tensile characteristics can also be achieved. When compared to vulcanizates cured with dicumyl peroxide, materials cured with a sulfur system exhibited higher tensile strength. With the application of co-agents in peroxide vulcanization, the tensile strength overcame the tensile behavior of sulfur-cured vulcanizates.
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