Room temperature redox initiated free radical polymerization (RFRP), without light, brings a significant breakthrough in the field of materials science including energy conservation, high efficiency, robustness in thick materials/composites, and easy operation. Meanwhile, the current redox initiating systems used are based on toxic aromatic amines and hazardous peroxides (e.g., dibenzoylperoxide). In the present paper, for the first time in literature, new amine‐free, peroxide‐free redox two component (2K) initiating systems comprised of diphenylsilane (DPS, a reducing agent) and manganese acetylacetonate (Mn(acac)3, an oxidizing agent) are proposed. The significance of the system is its applicability under mild conditions (RT, under air). Optical pyrometry measurement results showed that the DPS in combination with Mn(acac)3 exhibited an excellent radical initiating property for benchmark (meth)acrylate monomers, competitive with a well‐established amine/dibenzoyl peroxide reference. Based on electron spin resonance experiments, the initiating chemical mechanisms of RFRP are proposed.

中文翻译：

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联苯乙炔乙酸丙酮锰氧化还原引发体系：迈向无胺和无过氧化物体系

室温无氧氧化还原引发的自由基聚合（RFRP），在材料科学领域带来了重大突破，包括节能，高效，厚实的材料/复合材料的坚固性以及易于操作。同时，当前使用的氧化还原引发体系是基于有毒的芳香胺和有害的过氧化物（例如，过氧化二苯甲酰）。在本文中，有史以来第一次有新的无胺，无过氧化物的氧化还原两组分（2K）引发体系，由二苯基硅烷（DPS，一种还原剂）和乙酰丙酮锰（一种氧化锰（acac）3）组成。代理商）。该系统的重要性在于其在温和条件下（RT，空气中）的适用性。光学高温法测量结果表明，DPS与Mn（acac）3的结合对基准（甲基）丙烯酸酯单体表现出优异的自由基引发性能，与完善的胺/过氧化二苯甲酰对照具有竞争性。基于电子自旋共振实验，提出了RFRP的引发化学机理。