首页> 外文期刊>Journal of Applied Polymer Science >Reactions of 2-(4-morpholinothio)- and 2-(4-morpholinodithio) benzothiazole in the absence of polyisoprene
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Reactions of 2-(4-morpholinothio)- and 2-(4-morpholinodithio) benzothiazole in the absence of polyisoprene

机译:在没有聚异戊二烯的情况下,2-(4-晶烯醇噻嗪) - 和2-(4-晶二酮)苯并噻唑的反应

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2-(4-morpholinothio)benzothiazole (MOR) and 2-(4-morpholinodithio) benzothiazole (MDB) were heated with sulfur and ZnO in a DSC. The products formed at various temperatures were identified and analyzed by HPLC. At temperatures below 200 °C, decomposition of the accelerator in the absence of other curatives was slow, degradation products being mainly 2-bisbenzothiazole-2,2 prime -disulfide (MBTS) and 2-mercaptobenzothiazole (MBT). A rapid exothermic decomposition above 200 °C resulted in the formation of MBT (or its amine salt) and 2-(4-morpholino)benzothiazole (MB). MOR and MDB reacted with sulfur to form higher polysulfides. MDB was shown to react more readily with sulfur than MOR and the delayed action of MOR in rubber can therefore not be ascribed to a stable polysulfide as suggested by other authors. Neither MOR nor MDB was found to react with ZnO. A limited reaction between MBT and ZnO was observed.
机译:2-(4-晶硫噻嗪)苯并噻唑(MOR)和2-(4-晶二酮)苯并噻唑(MDB)用硫和ZnO在DSC中加热。 通过HPLC鉴定并分析在各种温度下形成的产物。 在低于200℃的温度下,促进剂的分解在没有其他固化剂的情况下是缓慢的,降解产物主要是2-双benzothiazole-2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2-巯基苯噻唑(MBT)。 高于200℃的快速放热分解,导致形成MBT(或其胺盐)和2-(4-晶醛)苯并噻唑(MB)。 Mor和MDB与硫反应以形成更高的多硫化物。 显示MDB与硫比MOR更容易反应,因此橡胶中的延迟作用不能归因于其他作者所提出的稳定多硫化物。 没有发现MOR和MDB与ZnO反应。 观察到MBT和ZnO之间的有限反应。

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