乙烯基吡咯烷酮与乙烯基己内酰胺水溶液共聚反应竞聚率的测定

Copolymerization of N-vinylpyrrolidone and N-vinylcaprolactam:Determination of Reactivity Ratio in Aqueous Solution

合成了乙烯基吡咯烷酮和乙烯基己内酰胺均聚物及其共聚物。用FTIR测定了不同比例的聚乙烯基吡咯烷酮和聚乙烯基己内酰胺共混物中两种单体含量比,建立了标准工作曲线,得到了在低转化率下不同初始单体组成的共聚物中两种单体的含量。用FR和KT两种作图法对单体的竞聚率进行计算和比较,结果表明乙烯基吡咯烷酮和乙烯基己内酰胺水溶液共聚反应的竞聚率分别为4.68和0.333。

The homopolymer of N-vinylpyrrolidone （NVP） and N-vinylcaprolactam （NVCL） as well as their eopolymers were synthesized in aqueous solution. The molar ratios of the two monomers in the mixture of polyvinylpyrrotidone and polyvinylcaprolactam were determined by Fourier transform infrared spectroscopy. The standard working curve was established to analyze the average copolymer composition. The reactivity ratios for NVP and NVCL evaluated by FR and KT methods were 4.68 and 0, 333, respectively.