SYNTHESIS AND AGGREGATION BEHAVIOR OF AN AMPHIPHILIC BLOCK COPOLYMER WITH STRONG PUSH-PULL AZO CHROMOPHORES ON SIDE CHAINS

WANG Dongrui; ZHU Yu; WANG Xiaogong

doi:10.3724/SP.J.1105.2009.00288

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SYNTHESIS AND AGGREGATION BEHAVIOR OF AN AMPHIPHILIC BLOCK COPOLYMER WITH STRONG PUSH-PULL AZO CHROMOPHORES ON SIDE CHAINS

Research Bulletin | 更新时间：2021-03-19

- SYNTHESIS AND AGGREGATION BEHAVIOR OF AN AMPHIPHILIC BLOCK COPOLYMER WITH STRONG PUSH-PULL AZO CHROMOPHORES ON SIDE CHAINS
- Acta Polymerica Sinica Issue 3, Pages: 288-292(2009)
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- DOI：10.3724/SP.J.1105.2009.00288
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- Published：20 March 2009，
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WANG Dongrui, ZHU Yu, WANG Xiaogong. SYNTHESIS AND AGGREGATION BEHAVIOR OF AN AMPHIPHILIC BLOCK COPOLYMER WITH STRONG PUSH-PULL AZO CHROMOPHORES ON SIDE CHAINS. [J]. Acta Polymerica Sinica (3):288-292(2009)
DOI：

WANG Dongrui, ZHU Yu, WANG Xiaogong. SYNTHESIS AND AGGREGATION BEHAVIOR OF AN AMPHIPHILIC BLOCK COPOLYMER WITH STRONG PUSH-PULL AZO CHROMOPHORES ON SIDE CHAINS. [J]. Acta Polymerica Sinica (3):288-292(2009) DOI： 10.3724/SP.J.1105.2009.00288.

摘要

利用原子转移自由基聚合（ATRP）和前体聚合物重氮偶合反应相结合的方法，制备了一种新型含强推拉电子型偶氮苯的嵌段共聚物PEG-b-P6CNAzo.首先使用大分子引发剂PEGBr引发单体甲基丙烯酸6（N-甲基苯胺基）己酯进行ATRP聚合，得到作为前体聚合物的两嵌段共聚物PEG-b-P6MA，然后再与4-氰基苯胺的重氮盐进行重氮偶合反应得到目标产物PEG-b-P6CNAzo.利用GPC、1H-NMR、UV-Vis等手段对制得的聚合物进行了详细的表征.1H-NMR分析结果表明PEG-b-P6MA的聚合度为122-b-13，重氮偶合反应转化率接近100%.GPC结果表明PEG-b-P6MA与PEG-b-P6CNAzo均具有较窄的分子量分布.向浓度为0.2 g/L的PEG-b-P6CNAzo四氢呋喃溶液中以0.5 mL/h速率加水，该嵌段共聚物可以形成直径约11 nm的棒状胶束.

Abstract

An amphiphilic block copolymer functionalized with strong pushpull azobenzene moieties

PEG-b-P6CNAzo

was synthesized through a scheme that combined ATRP and post-polymerization azo-coupling reaction.First

the precursor diblock copolymer

PEG-b-P6MA

containing aniline groups was prepared by a PEGBr initiated ATRP of monomer 6(N-methylanilino)hexyl methacrylate.Then PEG-b-P6CNAzo was obtained through azo-coupling reaction between PEG-b-P6MA and diazonium salt of 4-aminobenzonitrile.The azo block copolymer was carefully characterized by GPC

1H-NMR and UV-Vis.The polymerization degree of PEG-b-P6MA was 122-b-13

which was obtained through 1H-NMR analysis.Due to the high yield of azo-coupling reaction

the polymerization degree of PEG-b-P6CNAzo was also 122-b-13

the same as PEG-b-P6MA.GPC results revealed that both PEG-b-P6MA and PEG-b-P6CNAzo had narrow molecular weight distributions.By adding water under a rate of 0.5 mL/h to its THF solution with the concentration of 0.2 g/L

PEG-b-P6CNAzo formed rod-like micelles with diameter of ca.11 nm obtained by TEM observation.

关键词

偶氮聚合物嵌段共聚物自组装

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