SYNTHESIS AND CHARACTERIZATION OF THE THERMO- AND pH SENSITIVE STAR POLYMERS WITH A RIGID CORE OF β-CYCLODEXTRIN

HU Hui; FAN Xiaodong; HUANG Yi

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SYNTHESIS AND CHARACTERIZATION OF THE THERMO- AND pH SENSITIVE STAR POLYMERS WITH A RIGID CORE OF β-CYCLODEXTRIN

Research Article | 更新时间：2021-03-19

- SYNTHESIS AND CHARACTERIZATION OF THE THERMO- AND pH SENSITIVE STAR POLYMERS WITH A RIGID CORE OF β-CYCLODEXTRIN
- Acta Polymerica Sinica Issue 6, Pages: 805-811(2004)
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- Published：20 December 2004，
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HU Hui, FAN Xiaodong, HUANG Yi. SYNTHESIS AND CHARACTERIZATION OF THE THERMO- AND pH SENSITIVE STAR POLYMERS WITH A RIGID CORE OF β-CYCLODEXTRIN. [J]. Acta Polymerica Sinica (6):805-811(2004)
DOI：

HU Hui, FAN Xiaodong, HUANG Yi. SYNTHESIS AND CHARACTERIZATION OF THE THERMO- AND pH SENSITIVE STAR POLYMERS WITH A RIGID CORE OF β-CYCLODEXTRIN. [J]. Acta Polymerica Sinica (6):805-811(2004) DOI：

摘要

以不同用量的氯乙酰氯与 β-环糊精反应

得到含有不同酰化度的氯乙酰化β-环糊精

以此化合物为引发剂

采用原子转移自由基 (ATRP)引发甲基丙烯酸N

N-二甲氨基乙酯 (DMAEMA)聚合

得到温度及pH敏感的以 β-环糊精为核的星形聚合物 .通过红外光谱、13C-NMR、1H-NMR和氯元素滴定分析确定了酰化后的 β-环糊精的结构

并采用红外光谱、1H-NMR、元素分析、DSC表征了以 β-环糊精分子为核的星形聚甲基丙烯酸N

N-二甲氨基乙酯的大分子结构

紫外光谱研究表明聚合物水溶液具有明显的温度和pH敏感性.

Abstract

Two kinds of chemical modified β-cyclodextrin(β-CD) with different acylation degree were synthesized relying on the content of chloroacetyl chloride agent used．The structures of β-CD with different degree of acylation were characterized using infrared spectroscopy．13C-NMR

1H-NMR and titration analysis．Infrared spectroscopy and 13C-NMR indicated that acylations occurred at C-2 and C-6 position in β-CD

1H-NMR and titration analysis suggested that the acylation degrees of β-CD are 3.2 and 4.5

respectively．A series of star polymers having different average length of poly (N

N-dimethylaminoethyl methacrylate) were synthesized by atom transfer radical polymerization (ATRP) using anterior acylated β-CD as the initiator．The branch chain structure and their compositions were characterized using infrared spectroscopy

1H-NMR

element analysis and DSC．The star polymers prepared here had a hard 1CD core with the potential to form inclusion complexes with certain small organic compounds

and also their aqueous solutions were studied by UV spectroscopy in order to explore their thermo- and pH sensitivities．The results showed that the novel star polymers exhibited clearly thermo- and pH respondings in accordance with the change of the environment．

关键词

β-环糊精聚甲基丙烯酸NN二甲氨基乙酯星形高分子温度及pH敏感性

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