SYNTHESIS OF pH-RESPONSIVE AMPHIPHILIC DIBLOCK COPOLYMERS CONTAINING POLYISOBUTYLENE <italic style="font-style: italic">via</italic> OXYANION-INITIATED POLYMERIZATION AND THEIR MULTIPLE SELF-ASSEMBLY MORPHOLOGIES

Huai-chao Wang; Ming-zu Zhang; Pei-hong Ni; Jin-lin He; Ying Hao; Yi-xian Wu

doi:10.1007/s10118-013-1208-9

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SYNTHESIS OF pH-RESPONSIVE AMPHIPHILIC DIBLOCK COPOLYMERS CONTAINING POLYISOBUTYLENE via OXYANION-INITIATED POLYMERIZATION AND THEIR MULTIPLE SELF-ASSEMBLY MORPHOLOGIES

PAPER | Updated：2023-01-03

- SYNTHESIS OF pH-RESPONSIVE AMPHIPHILIC DIBLOCK COPOLYMERS CONTAINING POLYISOBUTYLENE via OXYANION-INITIATED POLYMERIZATION AND THEIR MULTIPLE SELF-ASSEMBLY MORPHOLOGIES
- Chinese Journal of Polymer Science Vol. 31, Issue 2, Pages: 218-231(2013)
- Affiliations：
  
  a.College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Jiangsu Key Laboratory of Advanced Functional Polymer Design and Application, Soochow University, Suzhou 215123, China
  b.State Key Lab of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
- Author bio：
  
  **Pei-hong Ni (倪沛红), E-mail: phni@suda.edu.cn
- Funds：
- DOI：10.1007/s10118-013-1208-9
  CLC：
- Received：28 May 2012，
  
  Revised：2012-07-25，
  
  Accepted：30 July 2012，
  
  Published：2013-02
- Accepted：
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Huai-chao Wang, Ming-zu Zhang, Pei-hong Ni, et al. SYNTHESIS OF pH-RESPONSIVE AMPHIPHILIC DIBLOCK COPOLYMERS CONTAINING POLYISOBUTYLENE via OXYANION-INITIATED POLYMERIZATION AND THEIR MULTIPLE SELF-ASSEMBLY MORPHOLOGIES[J]. Chinese Journal of Polymer Science, 2013, 31(2): 218-231. DOI: 10.1007/s10118-013-1208-9.
DOI：

Huai-chao Wang, Ming-zu Zhang, Pei-hong Ni, et al. SYNTHESIS OF pH-RESPONSIVE AMPHIPHILIC DIBLOCK COPOLYMERS CONTAINING POLYISOBUTYLENE via OXYANION-INITIATED POLYMERIZATION AND THEIR MULTIPLE SELF-ASSEMBLY MORPHOLOGIES[J]. Chinese Journal of Polymer Science, 2013, 31(2): 218-231. DOI: 10.1007/s10118-013-1208-9. DOI：

摘要

Abstract

Two pH-responsive amphiphilic di

block

copolymers

namely polyisobutylene-

block

-poly[2-(

-dimethylamino) ethyl methacrylate] (PIB-

-PDMAEMA) and polyisobutylene-

block

-poly(metharylic acid) (PIB-

-PMAA)

were synthesized

via

oxyanion-initiated polymerization

and their multiple self-assembly behaviors have been studied. An exo-olefin-terminated highly reactive polyisobutylene (HRPIB) was first changed to hydroxyl-terminated PIB (PIB-OH)

via

hydroboration-oxidation of C=C double bond in the chain end

and then reacted with KH to yield a potassium alcoholate of PIB (PIB-O

−

). PIB-O

−

was immediately used as a macroinitiator to polymerize DMAEMA monomer

resulting in a cationic di

block

copolymer PIB-

-PDMAEMA. With the similar synthesis procedure

the anionic di

block

copolymer PIB-

- PMAA could be prepared

via

a combination of oxyanion-initiated polymerization of

tert

-butyl methacrylate (

BMA) and subsequent hydrolysis of

tert

-butyl ester groups in P

BMA

block

. The functional PIB and

block

copolymers have been fully characterized by

H-NMR

FT-IR spectroscopy

and gel permeation chromatography (GPC). These samples allowed us to systematically investigate the effects of

block

composition on the pH responsivity and various self-assembled morphologies of the copolymers in THF/water mixed solvent. Transmission electron microscopy (TEM) images revealed that these di

block

copolymers containing small amount of original PIB without exo-olefin-terminated group are able to self-assemble into micelles

vesicles with different particle sizes and cylindrical aggregates

depending on various factors including

block

copolymer composition

solvent polarity and pH value.

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Related Institution

State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology

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SYNTHESIS OF pH-RESPONSIVE AMPHIPHILIC DIBLOCK COPOLYMERS CONTAINING POLYISOBUTYLENE via OXYANION-INITIATED POLYMERIZATION AND THEIR MULTIPLE SELF-ASSEMBLY MORPHOLOGIES

DOI：10.1007/s10118-013-1208-9

摘要

Abstract

关键词

Keywords

references