Surface modification of halogenated polymers: 3. Influence of additives such as alkali cations or nucleophiles on the magnesium reductive treatment of polytetrafluoroethylene
作者： Vincent Boittiaux , Fatiha Boucetta , Catherine Combellas , Frédéric Kanoufi , André Thiébault
DOI: 10.1016/S0032-3861(98)00419-4
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摘要: The presence of a small amount an alkali cation in magnesium solution dramatically increases the rate defluorination PTFE and enhances oxygenation. Evidence this effect is observed for concentrations down to 1 mM treatment durations only 10 s. also makes polymer porous. depth attack increase both with concentration duration treatment. Sodium more reactive than potassium which itself lithium. phenomenon not limited cations evident tetrabutylammonium cation. When nucleophiles such as diethylphosphite, thiophenoxide or anions 2-mercaptopyridine thiourea are present containing moderate solvated electrons ( < 50 mM), grafting nucleophile occurs but leads poor yields. (C) 1999 Elsevier Science Ltd. All rights reserved.
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