SYNTHESIS AND SELF-ASSEMBLY OF A pH-SENSITIVE HYPERBRANCHED MULTIARM COPOLYMER

ZHONG Ling1; HE Xiaohua2; ZHOU Yongfeng1; YAN Deyue1; PAN Caiyuan3

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SYNTHESIS AND SELF-ASSEMBLY OF A pH-SENSITIVE HYPERBRANCHED MULTIARM COPOLYMER

Research Article | 更新时间：2021-08-24

- SYNTHESIS AND SELF-ASSEMBLY OF A pH-SENSITIVE HYPERBRANCHED MULTIARM COPOLYMER
- Acta Polymerica Sinica Issue 10, Pages: 986-992(2007)
- 作者机构：
  
  1. 上海交通大学化学化工学院
  2. 华东师范大学化学系
  3. 中国科学技术大学高分子科学与工程系
- 作者简介：
- 基金信息：
- DOI：
  CLC： O631.3
- Published：2007，
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[1]钟玲,贺小华,周永丰,颜德岳,潘才元.pH值响应性超支化多臂共聚物的合成及其自组装行为研究[J].高分子学报,2007(10):986-992.

ZHONG Ling1, HE Xiaohua2, ZHOU Yongfeng1, YAN Deyue1, PAN Caiyuan3. SYNTHESIS AND SELF-ASSEMBLY OF A pH-SENSITIVE HYPERBRANCHED MULTIARM COPOLYMER. [J]. Acta Polymerica Sinica (10):986-992(2007)
[1]钟玲,贺小华,周永丰,颜德岳,潘才元.pH值响应性超支化多臂共聚物的合成及其自组装行为研究[J].高分子学报,2007(10):986-992. DOI：

ZHONG Ling1, HE Xiaohua2, ZHOU Yongfeng1, YAN Deyue1, PAN Caiyuan3. SYNTHESIS AND SELF-ASSEMBLY OF A pH-SENSITIVE HYPERBRANCHED MULTIARM COPOLYMER. [J]. Acta Polymerica Sinica (10):986-992(2007) DOI：

摘要

以超支化双硫酯为链转移剂

偶氮二异丁腈（AIBN）为引发剂

采用可逆加成-断裂链转移（RAFT）活性自由基聚合方法

合成了以超支化聚酯（Boltorn H20）为核

聚丙烯酸为臂的两亲性超支化多臂共聚物（H20-star-PAA）

并通过紫外分光光度计、动态光散射（DLS）和透射电子显微镜（TEM）对它在水溶液中的pH响应的自组装行为进行了研究.结果表明

在稀溶液条件下

H20-star-PAA始终以单分子胶束的形式存在

随着溶液pH的降低

胶束的PAA壳层会逐步塌缩

导致胶束尺寸减小;而在浓溶液条件下

当溶液的pH较低时

单分子胶束会进一步聚集形成多分子胶束.

Abstract

Reversible addition-fragmentation transfer(RAFT) polymerizations of acrylic acid were conducted using fractionated hyperbranched polyester(Bolton H20) based macroRAFT agent to obtain a hyperbranched multiarm copolymer of H20star-PAA.Phase transition and self-assembly behavior of H20-star-PAA at different solution pH were also studied by using dynamic light scattering(DLS) and transmission electron microscopy(TEM).The results show that at lower polymer concentrations

the hyperbranched macromolecules exist as unimolcular core-shell nanostructures with hydrophobic BoltornH20 as the core and swollen poly(acrylic acid)(PAA) as the shell

and the PAA shells will collapse on the surface of the micelles with decreasing the solution pH.While in high concentrations of the polymer

H20-star-PAA self-assemble into large multimolecular micelles due to the secondary aggregation of unimolecular micelles stabilized by the intermolecular hydrogen bonding.

关键词

可逆加成-断裂链转移超支化丙烯酸自组装

Keywords

Reversible addition fragmentation chain transferHyperbranchedAcrylic acidSelf-assembly

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Related Institution

State Key Laboratory of Chemical Resource Engineering, Beijing Advanced Innovation Center for Soft Matter Science and Engineering, Beijing University of Chemical Technology

Department of Polymer Science and Engineering, University of Massachusetts, Amherst

Shanghai Key Laboratory of Advanced Polymeric Materials, School of Materials Science and Engineering, East China University of Science and Technology

College of Textile Science and Engineering, Jiangnan University

School of Materials Science and Engineering, East China University of Science and Technology

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