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首页> 外文期刊>Journal of Applied Polymer Science >Characterization and dual functionalization of polystyrene with propionic anhydride and cyanate derivatives
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Characterization and dual functionalization of polystyrene with propionic anhydride and cyanate derivatives

机译：丙酸酐和氰酸酯衍生物对聚苯乙烯的表征和双重官能化

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摘要

First, Friedel-Crafts reactions were used for the acylation process. For this, polystyrene (PS) was reacted with propionic anhydride in the presence of Lewis acid catalyst. The amount of acyl group linked PS as a result of acylation has been identified as volumetric. Second, the bromination and lithiation reactions of acylated PS containing carbonyl groups were realized. Also, the lithiated PS containing acyl groups has been modified a second time with various isocyanates and isothiocyanate derivatives in the presence of nBuLi catalyst. Some important reaction parameters were assigned in order to optimize the process. The structure all of the products were characterized by Fourier transform infrared, 1H NMR (Proton Nuclear Magnetic Resonance), and thermogravimetric methods. In addition, reaction yields were determined according to the result of elemental analysis. Dual functionalization yields were realized between 62.2% and 69.9%. For kinetic analysis, the TG/DTG (Thermal Gravimetric Analysis/Differantial Thermal Analysis) data obtained at three different heating rates were processed by Kissinger-Akahira-Sunose method. The results demonstrated that the acylation reaction, bromination and lithiation reactions, and dual functionalization reactions with cyanate derivatives can be carried out to obtain a significantly functionalized polymer.
机译：首先，将Friedel-Crafts反应用于酰化过程。为此，在路易斯酸催化剂的存在下使聚苯乙烯（PS）与丙酸酐反应。由于酰化作用，与酰基连接的PS的量已确定为体积。其次，实现了含羰基的酰化PS的溴化和锂化反应。同样，在nBuLi催化剂存在下，用各种异氰酸酯和异硫氰酸酯衍生物第二次修饰了含酰基的锂化PS。分配了一些重要的反应参数以优化工艺。通过傅立叶变换红外，1 H NMR（质子核磁共振）和热重分析法对所有产物的结构进行表征。另外，根据元素分析的结果确定反应产率。实现了双功能化产率在62.2％至69.9％之间。对于动力学分析，通过基辛格-赤平-Sunose方法处理了在三种不同加热速率下获得的TG / DTG（热重分析/差热分析）数据。结果表明，可以进行与氰酸酯衍生物的酰化反应，溴化和锂化反应以及双重官能化反应以获得明显官能化的聚合物。

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