The synthesis of epoxy-terminated polystyrene was studied by high performance gel permeation chromatography and titration of sodium hydroxide in the presence of hydrochloric acid. The effect of the terminated reaction was also studied. The introduction of an end-capping reagent, cyclosulphide propane, had a retarding effect on the side reaction, whereas ring opening substances had an end-capping effect linking with carbanionic living polystyrene. The properties of the products would be expected to differ from those of the oligomers without capping, because carbanionic living polystyrene promotes thermal stability rather than an end-capping reagent character; this was deduced by acid-base titration and gel permeation chromatographic analysis in tetrahydrofuran.
Посилання на статтю:
Study of two-step capping in the synthesis of epoxy-terminated polystyrene oligomers by acid-base titration and gel permeation chromatography / Jiang Youqing* and Liang Eping // Polymer. – 1992. – Vol 33. – P. 5076-5080.