首页> 外文期刊>Journal of Applied Polymer Science >A Benzoxazole Sulfenamide Accelerator: Synthesis, Structure, Property, and Implication in Rubber Vulcanization Mechanism
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A Benzoxazole Sulfenamide Accelerator: Synthesis, Structure, Property, and Implication in Rubber Vulcanization Mechanism

机译:苯并恶唑亚磺酰胺促进剂的合成,结构,性能及其对橡胶硫化机理的影响

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摘要

A benzoxazole sulfenamide and its related zinc compound were synthesized and characterized, which are shown to be useful accelerators for sulfur vulcanization. In comparison with the benzothiazole accelerator, the benzoxazole sulfenamide revealed nearly no reversion, an improved feature that is desirable for tire industry. Through the synthesis of the zinc complex 9, which was assumed to be an accelerator-activator for vulcanization, the study aimed to shed some light on the vulcanization mechanism. The crystal structure of the zinc complex 9 showed that two benzoxazole-2-thiol ligands were attached to the zinc center in different isomeric forms, with one in the thio form (linked via sulfur atom) while the other in thio-keto form (linked via nitrogen atom). Lack of the vulcanization accelerator activity from 9 led to the assumption that the sulfurating species might be zinc complexes containing only one benzoxazole-2-thiol ligand.
机译:合成并表征了苯并恶唑次磺酰胺及其相关的锌化合物,并表明它们是硫磺硫化的有用促进剂。与苯并噻唑促进剂相比,苯并恶唑亚磺酰胺几乎没有还原,这是轮胎工业所希望的改进特性。通过合成锌络合物9(假定它是硫化的促进剂),该研究旨在阐明硫化机理。锌络合物9的晶体结构表明,两个苯并恶唑-2-硫醇配体以不同的异构体形式连接到锌中心,一个以硫醇形式(通过硫原子连接),另一个以硫醇酮形式(连接)连接。通过氮原子)。缺乏9的硫化促进剂活性导致了这样的假设,即硫化物可能是仅含有一个苯并恶唑-2-硫醇配体的锌络合物。

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