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首页> 外文期刊>Journal of Applied Polymer Science >Microstructure of vinylidene chloride ethyl acrylate copolymers by one- and two-dimensional NMR spectroscopy
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Microstructure of vinylidene chloride ethyl acrylate copolymers by one- and two-dimensional NMR spectroscopy

机译：一维和二维NMR光谱分析偏二氯乙烯丙烯酸乙酯共聚物的微观结构

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Vinylidene chloride/ethyl acrylate (V/E) copolymers were prepared by photopolymerization using uranyl ion as a photosensitizer at room temperature. Copolymers were characterized by chlorine estimation, gel permeation chromatography, H-1- and C-13-NMR, 2D heteronuclear single quantum correlation (HSQC), and homonuclear 1H-2D double quantum filter correlation spectroscopy (DQF-COSY). Reactivity ratios for the copolymerization of V with E were calculated using the Kelen-Tudos (KT) and the nonlinear error in variables (EVM) methods. The reactivity ratios obtained from the EVM. methods are r(V) = 0.80 +/- 0.15 and r(E) = 0.87 +/- 0.04. The microstructure was calculated in terms of the distribution of V-and E-centered triad sequences from C-13 {H-1}-NMR spectra of the copolymers. 2D HSQC was used to analyze the complex H-1-NMR spectrum and 2D COSY shows the various bond interactions, thus inferring the possible structure of the copolymers. (C) 1998 John Wiley & Sons, Inc. [References: 15]
机译：在室温下，使用铀酰离子作为光敏剂，通过光聚合制备偏二氯乙烯/丙烯酸乙酯（V / E）共聚物。通过氯估算，凝胶渗透色谱，H-1-和C-13-NMR，二维异核单量子相关性（HSQC）和同核1H-2D双量子滤光子相关光谱（DQF-COSY）对共聚物进行表征。使用Kelen-Tudos（KT）和变量非线性误差（EVM）方法计算V与E的共聚反应率。从EVM获得的反应率。方法是r（V）= 0.80 +/- 0.15和r（E）= 0.87 +/- 0.04。根据共聚物的C-13 {H-1} -NMR光谱，以V和E为中心的三单元组序列的分布计算出微观结构。 2D HSQC用于分析复杂的H-1-NMR谱图，而2D COZY显示出各种键相互作用，从而推断出共聚物的可能结构。 （C）1998 John Wiley＆Sons，Inc. [参考：15]

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