Abstract

A new approach to the synthesis of sulfonyl chloride initiators with the calixarene core for the cationic polymerization of 2-oxazolines is developed. The kinetics of 2-ethyl-2-oxazoline polymerization with the synthesized octafunctional initiator at 100°С in sulfolane is studied. It is shown that the decelerated initiation of polymerization is observed in the system and the rate constant of chain propagation is k_p = 1.20 × 10^–3 L/(mol s). Using the cationic ring-opening polymerization of 2-alkyl-2-oxazolines initiated by calix[8]arene functionalized by sulfonyl chloride groups in the lower rim, star-shaped thermosensitive polymers are synthesized, and the molecular weight characteristics of the polymers are investigated. The critical micelle concentration of star-shaped poly(2-isopropyl-2-oxazoline) is determined (С_CMC = 6.25 × 10^–5 g/mL), and the solubilizability of the synthesized polymers is investigated using hydrophobic dye curcumin as an example.

中文翻译：

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基于磺化氯化杯[8]芳烃的新型星形聚（2-烷基-2-恶唑啉）合成

摘要

开发了一种新的合成具有杯芳烃核的磺酰氯引发剂的方法，用于2-恶唑啉的阳离子聚合。研究了在环丁砜中在100°C下用合成的八官能引发剂进行2-乙基-2-恶唑啉聚合的动力学。结果表明，在体系中观察到聚合反应的减速开始，链增长的速率常数为k _p = 1.20×10 ^–3L /（摩尔·s）。利用在下部边缘通过磺酰氯基团官能化的杯[8]芳烃引发的2-烷基-2-恶唑啉的阳离子开环聚合反应，合成了星形热敏聚合物，并研究了该聚合物的分子量特性。 。星形聚（2-异丙基-2-恶唑啉）的临界胶束浓度被确定（С _CMC = 6.25×10 ^-5克/毫升），以及合成的聚合物的使用solubilizability疏水性染料姜黄素作为一个例子进行了研究。