端羧基黄原酸酯的合成及其在聚偏氟乙烯合成中的应用

摘要

以乙基黄原酸钾与2-溴丙酸为原料合成了一种端羧基黄原酸酯,并利用傅里叶红外光谱(FTIR)、氢核磁共振波谱(1H NMR)对合成的端羧基黄原酸酯进行了表征.利用合成的端羧基黄原酸酯进行偏氟乙烯(VDF)的可逆加成-断裂链转移(RAFT)聚合制备了聚偏氟乙烯(PVDF).氢谱核磁积分法证明:通过调节VDF单体与端羧基黄原酸酯链转移剂的量比可以合成一系列不同聚合度的聚偏氟乙烯.%A carboxyl-terminated xanthates was successfully synthesized by the reaction between potassium ethylxanthate and 2-bromopropionic acid. Synthetic xanthates were characterized by Fourier transform infrared spectroscopy (FTIR) and 1H nuclear magnetic resonance spectroscopy. Then,polyvinylidene fluoride was prepared by reversible addition-fragmentation chain transfer (RAFT) polymerization of vinylidene fluoride (VDF) using the synthesized carboxyl-terminated xanthates. It is proved that a series of polyvinylidene fluoride with different polymerization degree(n) can be synthesized by adjusting the molar ratio of VDF monomer to carboxyl-terminated xanthates by magnetic induction method.