Abstract

The preparation of the fluorescent diblock copolymer was carried out between poly(tetrahydrofuran) (PTHF) and poly(ε-caprolactone) (PCL) via bulk and ring-opening polymerization (ROP) method by using two different dyes such as fluorescent methyl red (MR) and eosin b (EB) as lone chemical initiators at 160 °C under N₂ atmosphere for two hours. All the prepared homopolymer and diblock copolymer were examined by NMR and FT-IR like analytical instruments. The molecular weight of the diblock copolymer was higher than the homopolymer. The TGA results showed that the thermal stability of PTHF in the diblock copolymer was lower when compared with dye end capped PCL. In this work, the ROP efficiency of two different dye-based initiators is compared and their results are critically analyzed. The –OH group-containing EB exhibited excellent results. The dye conjugated polymer was prepared by a single-step process.

摘要

荧光二嵌段共聚物的制备是通过本体和开环聚合（ROP）方法在聚四氢呋喃（PTHF）和聚（ε-己内酯）（PCL）之间进行的，使用两种不同的染料，例如荧光甲基红（ MR）和曙红b（EB）作为单独的化学引发剂在160°C和N _2下气氛持续了两个小时。通过NMR和FT-IR等分析仪器检查所有制备的均聚物和二嵌段共聚物。二嵌段共聚物的分子量高于均聚物。TGA结果显示，与染料封端的PCL相比，二嵌段共聚物中PTHF的热稳定性较低。在这项工作中，比较了两种不同的基于染料的引发剂的ROP效率，并对它们的结果进行了严格的分析。含–OH基团的EB表现出优异的结果。染料共轭聚合物是通过一步法制备的。