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首页> 外文期刊>Journal of Macromolecular Science. Pure and Applied Chemistry >N-vinylpyrrolidone and 4-vinyl Benzylchloride Copolymers: Synthesis, Characterization and Reactivity Ratios
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N-vinylpyrrolidone and 4-vinyl Benzylchloride Copolymers: Synthesis, Characterization and Reactivity Ratios

机译：N-乙烯基吡咯烷酮和4-乙烯基苄基氯共聚物：合成，表征和反应率

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摘要

The copolymers prepared in this study by free radical copolymerization of N-vinylpyrrolidone (M2) with 4-vinylbenzylchloride (M1) using 2,2'-azobisisobutyronotrile (AIBN) initiator in 1,4-dioxane solvent at 70C were characterized by FTIR, 1H-NMR and 13C-NMR techniques. Polymer solubility was tested in both polar and nonpolar solvents. The thermal properties were studied by thermogravimetric analysis (TGA) and differential scanning calorimeter (DSC). Copolymer compositions were established by H1-NMR spectra, while reactivity ratios of the monomers were computed using the linearization methods viz., Fineman-Ross (FR) (r1 = 1.67 and r2 = 0.67), Kelen-Tudos (KT) (r1 = 1.77 and r2 = 0.65) and extended Kelen-Tudos (EK-T) (r1 = 1.72 and r2 = 0.63) methods at lower conversion. Furthermore, reactivity ratios in nonlinear error-in-variables method (RREVM) also compute the reactivity ratios (r1 = 1.76 and r2 = 0.66); these are found to be in good agreement with each other. The distribution of monomer sequence along the copolymer chain was calculated using a statistical method based on the calculated reactivity ratios.
机译：本研究中，在1,4-二恶烷溶剂中，使用2,2'-偶氮二异丁腈腈（AIBN）引发剂，在70°C下，通过N-乙烯基吡咯烷酮（M2）与4-乙烯基苄基氯（M1）自由基共聚制备的共聚物通过FTIR，1H表征-NMR和13C-NMR技术。测试了聚合物在极性和非极性溶剂中的溶解度。通过热重分析（TGA）和差示扫描量热仪（DSC）研究了热性能。通过H1-NMR光谱确定共聚物组成，同时使用线性化方法即Fineman-Ross（FR）（r1 = 1.67和r2 = 0.67），Kelen-Tudos（KT）（r1 = 1.77和r2 = 0.65）和扩展Kelen-Tudos（EK-T）（r1 = 1.72和r2 = 0.63）方法的转换率较低。此外，非线性变量误差法（RREVM）中的反应率也可以计算反应率（r1 = 1.76和r2 = 0.66）;发现它们彼此之间具有很好的一致性。基于所计算的反应率，使用统计方法来计算单体序列沿共聚物链的分布。

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