The smoke produced from the oxidative pyrolysis of perfluoro polymers: an ESR spin-trapping study.
The smoke produced from the oxidative pyrolysis of perfluoro polymers: an ESR spin-trapping study.
复制标题
全氟聚合物氧化热解产生的烟雾：ESR 自旋捕获研究。
DOI：
10.1021/tx00009a009
复制
发表时间：
1989
影响因子：
4.1
通讯作者：
Pryor,WA
中科院分区：
文献类型：
--
作者：
Lachocki,TM;Nuggehalli,SK;Scherer,KV;Church,DF;Pryor,WA
当全氟聚合物（PFP）有氧热解过程中产生的未经过滤的烟雾通过ESR自旋阱a-苯基- iv -terf-丁基硝基酮（PBN）的溶液起泡时，观察到自旋加合物。自旋加合物包括来自氧自由基和氟原子的自旋加合物，此外自旋阱被氧化成PBNOx。氯原子的自旋加合也被观察到，大概是因为聚合物中含有氯的杂质。PFP在热解过程中产生四氟乙烯；因此，我们对四氟乙烯进行了与PFP相同的热解，并观察到相同的自旋加合物系列。我们认为自旋加合物是由PFP烟雾中未过滤的整体烟雾形成的，可能是由PFP热解过程中形成的自由基和热解过程中产生的四氟乙烯的低聚反应产生的。这些自旋捕获结果支持了PFP烟雾中存在活性自由基并可能导致PFP烟雾毒性的理论。
Spin adducts are observed when theunfiltered smoke produced during theaerobic pyrolysis of perfluoro polymers (PFP) is bubbled through a solution of the ESR spin trap a-phenyl-IV-terf-butylnitrone (PBN). The spin adducts include those from an oxy radical and the fluorine atom, and in addition the spin trap is oxidized to PBNOx. The spin adduct of a chlorine atom also is observed, presumably because of chlorine-containing impurities in the polymers. Tetrafluoroethylene is produced during the pyrolysisof PFP; therefore, we subjected tetrafluoro-ethylene to the same pyrolysis as was used for PFP, and we observe the same series of spin adducts. We suggest that the spin adducts formed from the whole, unfiltered smoke from PFP smoke may result both from free radicals that form during the pyrolysis of PFP and from the oligomerization of the tetrafluoroethylene produced during the pyrolysis. These spin-trapping results support the theory that reactive free radicals are present in PFP smoke and may contribute to PFP smoke toxicity.