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碳氟聚合物的热解

Pyrolysis of Fluorocarbon Polymers.

作者信息

Wall Leo A, Straus Sidney

出版信息

J Res Natl Bur Stand A Phys Chem. 1961 May-Jun;65A(3):227-238. doi: 10.6028/jres.065A.027. Epub 1961 Jun 1.

DOI:10.6028/jres.065A.027
PMID:32196241
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5287283/
Abstract

The thermal decomposition of various fluorocarbon polymers were investigated; volatile products of the decomposition were determined along with the overall rates of volatilization, and from these rates the activation energies were calculated for the thermal degradation reactions. The thermally most stable of all the polymers thus far studied are the completely fluorinated ones. However, evidence from a study of the decomposition of hexafluoropropylene telomers and from the study of a copolymer of tetrafluoroethylene and hexafluoropropylene suggests that the homopolymer of hexafluoropropylene, if it could be made, would be quite unstable. The photoinduced decomposition of polytrifluorochloroethylene was also investigated, and estimates of the activation energies were obtained for the various elementary steps of the decomposition mechanism. The photoinduced experiments indicated that mutual termination of the radical intermediates takes place and that a diffusion effect on depropagation becomes pronounced below 250 °C.

摘要

研究了各种氟碳聚合物的热分解；测定了分解的挥发性产物以及整体挥发速率，并根据这些速率计算了热降解反应的活化能。迄今为止所研究的所有聚合物中，热稳定性最高的是完全氟化的聚合物。然而，对六氟丙烯端聚物分解的研究以及对四氟乙烯与六氟丙烯共聚物的研究证据表明，六氟丙烯的均聚物（如果能够制得的话）会相当不稳定。还研究了聚三氟氯乙烯的光致分解，并获得了分解机理各个基本步骤的活化能估计值。光致分解实验表明，自由基中间体发生相互终止，并且在250℃以下，脱增长的扩散效应变得显著。

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引用本文的文献

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Gamma Irradiation of Fluorocarbon Polymers.碳氟聚合物的伽马辐照
J Res Natl Bur Stand A Phys Chem. 1961 Jul-Aug;65A(4):375-387. doi: 10.6028/jres.065A.038. Epub 1961 Aug 1.
2
Experimental Study on Fluorine Release from Photovoltaic Backsheet Materials Containing PVF and PVDF during Pyrolysis and Incineration in a Technical Lab-Scale Reactor at Various Temperatures.在技术实验室规模的反应器中，于不同温度下对含PVF和PVDF的光伏背板材料在热解和焚烧过程中氟释放的实验研究。
Toxics. 2019 Sep 18;7(3):47. doi: 10.3390/toxics7030047.

本文引用的文献

1
Phosphinoborine Compounds: Mass Spectra and Pyrolysis.膦硼烷化合物：质谱与热解
J Res Natl Bur Stand A Phys Chem. 1959 Jul-Aug;63A(1):63-66. doi: 10.6028/jres.063A.004. Epub 1959 Aug 1.
2
Influence of Impurities on the Pyrolysis of Polyamides.杂质对聚酰胺热解的影响。
J Res Natl Bur Stand A Phys Chem. 1959 Nov-Dec;63A(3):269-273. doi: 10.6028/jres.063A.021. Epub 1959 Dec 1.
3
Thermal Degradation of Polymers at High Temperatures.聚合物在高温下的热降解
J Res Natl Bur Stand A Phys Chem. 1959 Nov-Dec;63A(3):261-268. doi: 10.6028/jres.063A.020. Epub 1959 Dec 1.