硫醇 mercaptan： 硫醇是指包含巯基官能团（-SH）的一类非芳香化合物。从结构上来说，可以看成普通醇中的氧被硫替换之后形成的。除甲硫醇在室温下为气体外，其他硫醇均为液体或固体。低级硫醇一般有难闻的气味，有毒。可应用于在光固化体系能够明显改善低能量固化条件的氧阻聚现象。氧的阻聚主要是由于体系中的自由基和氧气形成了过氧自由基，过氧自由基相对稳定导致链增长反应变缓慢，硫醇中的活泼氢可以和过氧自由基反应，硫醇被夺氢后形成新的自由基，继续参与加成反应。
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