Temperature and pH-Dual Responsive AIE-Active Core Crosslinked Polyethylene–Poly(methacrylic acid) Multimiktoarm Star Copolymers

Type
Article

Authors
Zhang, Zhen
Hadjichristidis, Nikos

KAUST Department
Chemical Science Program
KAUST Catalysis Center (KCC)
Physical Science and Engineering (PSE) Division
Polymer Synthesis Laboratory

Online Publication Date
2018-07-05

Print Publication Date
2018-07-17

Date
2018-07-05

Abstract
A series of aggregation-induced emission (AIE) active core crosslinked miktoarm star copolymers, having multi polyethylene (PE) and poly(methacrylic acid) (PMAA) arms, were synthesized and their thermal/pH responsive properties were studied. The procedure involves (a) the synthesis of PE-Br by polyhomologation of dimethylsulfoxonium methylide with triethylborane as initiator, followed by oxidation-hydrolysis/esterification reactions and of poly(tert-butyl methacrylate) (PtBMA-Br) by atom transfer radical polymerization (ATRP) of tert-butyl methacrylate, (b) the synthesis of (PE)n-(PtBMA)m-P(TPE-2St) by ATRP of a double styrene-functionalized tetraphenylethene (TPE-2St) with PE-Br and PtBMA-Br macroinitiators, and (c) the hydrolysis of (PE)n-(PtBMA)m-P(TPE-2St) to afford the amphiphilic miktoarm star copolymers (PE)n-(PMMA)m-P(TPE-2St). Due to their spherical core–shell structure (temperature-responsive) and the presence of hydrophilic PMAA (pH-responsive) and TPE-2St (AIE), these miktoarm star copolymers are AIE materials with temperature/pH-dual responsivity. In addition, thanks to the coexistence of hydrophilic and hydrophobic arms, these materials promote stable water-in-oil emulsions.

Citation
Zhang Z, Hadjichristidis N (2018) Temperature and pH-Dual Responsive AIE-Active Core Crosslinked Polyethylene–Poly(methacrylic acid) Multimiktoarm Star Copolymers. ACS Macro Letters 7: 886–891. Available: http://dx.doi.org/10.1021/acsmacrolett.8b00329.

Acknowledgements
Research reported in this publication was supported by King Abdullah University of Science and Technology (KAUST).

Publisher
American Chemical Society (ACS)

Journal
ACS Macro Letters

DOI
10.1021/acsmacrolett.8b00329

Additional Links
https://pubs.acs.org/doi/10.1021/acsmacrolett.8b00329

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