聚醋酸乙烯酯与铜（Ⅱ）离子的配位反应及其催化作用

Coordination Reaction of Polyvinyl Acetate with Cu(Ⅱ)Ion and Catalytic Function of The Coordination Product

以ＥＳＲ、ＵＶ和ＩＲ表征Ｃｕ（２＋）离子与ＰＶＡＣ的配位反应。根据ＣＵＣｌ２·２Ｈ２Ｏ乙醇溶液与ＰＶＡｃ－ＣｕＣｌ２·２Ｈ２Ｏ乙醇溶液的电导率差值随Ｃｕ（２＋）离子摩尔浓度变化的明显转析点得知，１个Ｃｕ（２＋）离子大约能与ＰＶＡｃ４个链节单元配位。证实ＭＭＡ在Ｃｕ（Ⅱ）－ＰＶＡｃ配合物／Ｎａ２ＳＯ３体系的聚合体是无规ＰＭＭＡ，得率为７０％。讨论了ＭＭＡ在Ｃｕ（Ⅱ）－ＰＶＡｃ配合物／Ｎａ２ＳＯ３体系络合催化引发下的游离基反应历程。

he coordination reaction of PVAc with Cu(2+) is characterized by ESR, UV,XPS and IR. According to specific conductances of the alcohol (95%) solution for CuCl2ZH2O and for PVAc-CuCl22H2O, the scheme of their differences in corresponding specific conductances gives an indication of coordination proportion for Cu(Ⅱ)-PVAc. By means of IR, it is comfirmed that the POlymer of MMA produced in the system of Cu(Ⅱ)-PVAc coordination compound / Na2SO3is inregular structure of PMMA. The yield of PMMA is 70%. The free radical mechanism for the polymerization of MMA, that is due to the coordination catalysis-initiation in the system of Cu (Ⅱ)-PVAc coordination compound/ Na2SO3,is discussed.