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Reduction of liquid terminated-carboxyl fluoroelastomers using NaBH4/SmCl3

机译：使用NaBH4 / SMCL3还原液体终止羧基含氟弹性体

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摘要

Using a simple one-pot method, the reduction of liquid terminated-carboxyl fluoroelastomers (LTCFs) by sodium borohydride and samarium chloride (NaBH _(4) /SmCl _(3) ) was successfully realized and liquid terminated-hydroxyl fluoroelastomers (LTHFs) were obtained. The structure and functional group content of LTCFs and LTHFs were analyzed by FTIR, ~(1) H-NMR, ~(19) F-NMR and chemical titration. The results showed that –CC– and carboxyl groups of LTCFs were reduced efficiently, the reduction rate reached 92% under optimum reaction conditions. Compared with other frequently-used metal chlorides, SmCl _(3) with a high coordination number could increase the reduction activity of NaBH _(4) more effectively and the reduction mechanism was explored.
机译：使用简单的单壶方法，通过硼氢化钠和氯化钐（NabH _（4）/ SMCl _（3））进行液体终止 - 羧基含氟弹性体（LTCF）的减少，并含有液体终止 - 羟基含氟弹性体（LTHF）获得了。通过FTIR，〜（1）H-NMR，〜（19）F-NMR和化学滴定分析LTCF和LTHF的结构和官能团含量。结果表明，在最佳反应条件下，LTCFS的-CC和羧基和LTCF的羧基和羧基降低了92％。与其他经常使用的金属氯化物相比，具有高协调数的SMCL _（3）可以更有效地增加NaBH _（4）的还原活性，并且探讨了还原机制。

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