This article introduced the definition, harm of free radicals. The category and scavenging mechanism of free radical scavengers were also presented.

概述了自由基的概念、对人体的危害以及自由基清除剂的种类和作用机制。

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MMA is selected as raw material of the preparation of MPOF. Compressed bulk free radical polymerization is adopted by means of analyzing polymerization method and polymerization mechanism.

制备MPOF的原料选用甲基丙烯酸甲酯(MMA)，通过对聚合方法和聚合机理的分析，确定采用加压本体自由基聚合技术。

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The test results provided important evidences for the free radical chain mechanism of sulfite oxidation and an effective method to prevent sulfite from failure in storage.

试验结果为亚硫酸盐氧化的自由基机理提供了有力的证据，也为防止亚硫酸盐的贮存失效提供了有效的方法。

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