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碳氟聚合物的伽马辐照

Gamma Irradiation of Fluorocarbon Polymers.

作者信息

Florin Roland E, Wall Leo A

出版信息

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.

DOI:10.6028/jres.065A.038
PMID:32196184
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5287141/
Abstract

Several fluorocarbon polymers were irradiated with Co gamma radiation at doses up to 10 ev/g. The polymers studied included polytetrafluoroethylene, polytrifluoroethylene, polychlorotrifluoroethylene, a copolymer of tetrafluoroethylene with hexafluoropropylene, and several rubbery vinylidene fluoride copolymers. -values were measured for volatile products, for free radicals detected by electron spin resonance, and, in the case of polychlorotrifluoroethylene, for scissions. The course of degradation or crosslinking was followed by zero-strength-time and tensile-strength measurements. It was found that for polytetrafluoroethylene and its hexafluoropropylene copolymer the presence of air-accelerated scission drastically. The mechanism of the radiation-induced changes is discussed in terms of free-radical intermediates.

摘要

几种碳氟化合物聚合物用钴γ射线以高达10电子伏特/克的剂量进行辐照。所研究的聚合物包括聚四氟乙烯、聚三氟乙烯、聚氯三氟乙烯、四氟乙烯与六氟丙烯的共聚物，以及几种橡胶状偏二氟乙烯共聚物。测定了挥发性产物、通过电子自旋共振检测到的自由基的γ值，对于聚氯三氟乙烯，还测定了断链的γ值。通过零强度时间和拉伸强度测量来跟踪降解或交联过程。发现对于聚四氟乙烯及其六氟丙烯共聚物，空气的存在会极大地加速断链。根据自由基中间体讨论了辐射诱导变化的机制。

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本文引用的文献

1
Pyrolysis of Fluorocarbon Polymers.碳氟聚合物的热解
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.
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Gamma Irradiation of Hexafluorobenzene.六氟苯的伽马辐照
J Res Natl Bur Stand A Phys Chem. 1960 Jul-Aug;64A(4):269-280. doi: 10.6028/jres.064A.026. Epub 1960 Aug 1.
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Effect of ionizing radiation on long-chain olefins and acetylenes.电离辐射对长链烯烃和乙炔的影响。
脉冲电子引发苯乙烯在聚（四氟乙烯-共-六氟丙烯）上接枝的机理及特性研究，以制备聚合物电解质膜。
Radiat Res. 2018 Sep;190(3):309-321. doi: 10.1667/RR15006.1. Epub 2018 Jun 18.
Radiat Res. 1955 Feb;2(1):96-107.
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Irradiation of polymers by high-energy electrons.高能电子对聚合物的辐照
Nature. 1953 Jul 11;172(4367):76-7. doi: 10.1038/172076a0.