Determination of Vinyl Monomers Reactivity by Carbon-13 Nuclear Magnetic Resonance Spectroscopy
Determination of Vinyl Monomers Reactivity by Carbon-13 Nuclear Magnetic Resonance Spectroscopy
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碳 13 核磁共振波谱法测定乙烯基单体反应性
DOI：
10.1021/ma60064a043
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发表时间：
1978
期刊：
影响因子：
5.5
通讯作者：
P. Teyssié
中科院分区：
文献类型：
--
作者：
J. Herman;P. Teyssié
在两种或更多种乙烯基单体的自由基共聚中，所得组成（控制最终产物的性质）取决于竞聚率（r1，r2），主要由静电因子e确定，如Alfrey-Price Qe方案中所定义。因此，任何直接和简便的测定ri、r2和e的方法都是预测所得共聚物的组成和性能的最有用的工具。在使用UV 2和IR 3光谱的几次尝试之后，已经发表了几篇论文，建立了反应性参数（ri、r2和e）和13 C NMR光谱数据之间的相关性。4-9重新考虑这些结果，我们发现有趣的是，3-碳化学位移（（ε））与相应的e值的关系图（图1）清楚地表明，
In radical copolymerization of two or more vinyl monomers, the resulting composition (controlling the properties of the final product) depends on the reactivity ratios (ri, r2), mainly determined by the electrostatic factor e as defined in the Alfrey-Price Qe scheme. 1 Consequently, any direct andeasy method for the determination of ri, r2 and e represents a most useful tool for the prediction of these composition and properties of the copolymers obtained. After several attempts using UV2 and IR3 spectroscopy, a few papers have been published establishing correlations between reactivity parameters (ri, r2, and e) and as well as 13C NMR spectroscopic data. 4-9 Reconsidering these results, we have found that inter-estingly, a plot of the¿ 3-carbon chemicalshifts ((ß)) vs. the corresponding e values (Figure 1) puts clearly in evidence a