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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and characterization of polystyrene oligomers with several pendent epoxy groups
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Synthesis and characterization of polystyrene oligomers with several pendent epoxy groups

机译：具有多个侧环氧基的聚苯乙烯低聚物的合成与表征

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摘要

Living polystyryl lithium was synthesized by anionic polymerization under the protection of argon at normal pressure, and styrene, toluene, tetrahydrofuran, and n-butyllithium were used as a monomer, solvent, polar reagent, and initiator, respectively. Then, polystyrene oligomers containing several pendent epoxy groups with well-defined structures and narrow molecular weight distributions (weight-average molecular weightumberaverage molecular weight <1.1) were prepared by the reaction of polystyryl lithium with glycidyl methacrylate. The prepared oligomers were characterized with gel permeation chromatography, Fourier transform infrared spectroscopy, ~1H-NMR, and the hydrochloric acid/dioxane argentimetric method. The effects of the glycidyl methacrylate dosage, molar mass of polystyrene precursors, copolymerization time, and temperature on the content of side epoxy groups were also investigated. The results confirm that 1,1-diphenylethylene- end-capped polystyryl carbanion could initiate glycidyl methacrylate in toluene in the presence of lithium chloride and a small amount of tetrahydrofuran, and the content of the side epoxy groups could be adjusted.
机译：在常压下，在氩气的保护下，通过阴离子聚合反应合成了聚苯乙烯基锂，分别将苯乙烯，甲苯，四氢呋喃和正丁基锂用作单体，溶剂，极性试剂和引发剂。然后，通过使聚苯乙烯基锂与甲基丙烯酸缩水甘油酯反应，制备了具有几个具有明确结构和窄分子量分布（重均分子量/数均分子量<1.1）的侧链环氧基的聚苯乙烯低聚物。制备的低聚物用凝胶渗透色谱，傅里叶变换红外光谱，〜1H-NMR和盐酸/二恶烷容量法进行表征。还研究了甲基丙烯酸缩水甘油酯的用量，聚苯乙烯前体的摩尔质量，共聚时间和温度对侧环氧基含量的影响。结果证实，在氯化锂和少量四氢呋喃的存在下，1,1-二苯基乙烯-封端的聚苯乙烯基碳负离子可以在甲苯中引发甲基丙烯酸缩水甘油酯，并且可以调节侧环氧基的含量。

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