文章基本信息

标题：Effect of the Macromolecular Characteristics of the Polymer Support on the Reactivity of Polystyrene-Supported Chromates
本地全文：下载
作者：Suma Bino Thomas ; Beena Mathew
期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2016
卷号：5
期号：7
页码：13587
DOI：10.15680/IJIRSET.2016.0507197
出版社：S&S Publications
摘要：Polystyrene crosslinked with 2-20 mol% divinylbenzene (DVB), ethyleneglycol dimethacrylate(EGDMA) and hexanediol diacrylate (HDODA) was synthesized and functionalized to incorporate chromate function.The polymers were characterised FT-IR and 13C CP-MAS NMR spectroscopy and scanning electron microscopy. Theefficiency of this reagent as a heterogeneous catalyst was investigated towards the oxidation of benzoin to benzyl as amodel reaction. The topographical nature of the polymer matrix exerts a significant influence on the reactivity of theattached functional groups. Among the three crosslinked systems the reactivity decreased in the order HDODA- >EGDMA- > DVB-crosslinked system. This is due to the increase in the flexibility of the HDODA- and EGDMAcrosslinkedsystems compared to rigid DVB system. The reactivity was found to be high for low crosslinked systemsand decreased with increase in crosslinking. Studies revealed that the reactivity of the supported chromate function ishighly dependent on the nature and degree of crosslinking.
关键词：polystyrene; crosslinked; supported; chromate; oxidation; structure- reactivity correlation