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首页> 外文期刊>Macromolecular Research >Synthesis and pH-Dependent Micellization of a Novel Block Copolymer Containing s-Triazine Linkage
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Synthesis and pH-Dependent Micellization of a Novel Block Copolymer Containing s-Triazine Linkage

机译：新型的含s-三嗪键的嵌段共聚物的合成及pH依赖性胶束化

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摘要

Novel pH-sensitive moieties containing an s-triazine ring were synthesized with sulfonamide and secondary amino groups.The synthesized pH-sensitive moieties were used for the synthesis of a pH-sensitive amphiphilic ABA triblock copolymer.The pH-sensitive triblock copolymer was composed of diblock copolymers,methoxy poly(ethylene glycol)-poly (epsilon-caprolactone-co-D,L-lactide) (MPEG-PCLA),and pH-sensitive moiety.These copolymers could be dissolved molecularly in both acidic and basic aqueous media at room temperature due to secondary amino and sulfonamide groups.The synthesized s-triazine rings containing pH-sensitive compounds were characterized by ~1H-NMR,~(13)C-NMR,and LC/MSD spectral data.The synthesized diblock and triblock copolymers were also characterized by ~1H-NMR and GPC analyses.The critical micelle concentrations at various pH conditions were determined by fluorescence technique using pyrene as a probe.Furthermore,the micellization and demicellization study of the triblock copolymer was done with pH-sensitive groups.The sensitivity towards pH change was further established by acid-base titration.
机译：用磺酰胺和仲氨基合成了一个新的含s-三嗪环的pH敏感基团，将合成的pH敏感基团用于pH敏感两亲ABA三嵌段共聚物的合成。二嵌段共聚物，甲氧基聚（乙二醇）-聚（ε-己内酯-co-D，L-丙交酯）（MPEG-PCLA）和pH敏感部分。这些共聚物可以在酸性和碱性水性介质中分子溶解由于具有1H-NMR，〜（13）C-NMR和LC / MSD光谱数据，对合成的含pH敏感化合物的s-三嗪环进行了表征。合成的二嵌段和三嵌段共聚物还通过〜1H-NMR和GPC分析对其进行了表征。以as为探针，通过荧光技术测定了在各种pH条件下的临界胶束浓度。此外，triblo的胶束化和去离子化研究ck共聚物是用pH敏感基团完成的。通过酸碱滴定进一步确定了对pH变化的敏感性。

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