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Photo‐Controlled Polymerization‐Induced Self‐Assembly (Photo‐PISA): A Novel Strategy Using In Situ Bromine‐Iodine Transformation Living Radical Polymerization
Author(s) -
Xu Qinghua,
Tian Chun,
Zhang Lifen,
Cheng Zhenping,
Zhu Xiulin
Publication year - 2019
Publication title -
macromolecular rapid communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.348
H-Index - 154
eISSN - 1521-3927
pISSN - 1022-1336
DOI - 10.1002/marc.201800327
Subject(s) - polymerization , polymer chemistry , copolymer , materials science , monomer , methacrylate , ethylene glycol , dynamic light scattering , gel permeation chromatography , radical polymerization , photochemistry , chemistry , polymer , nanoparticle , organic chemistry , nanotechnology , composite material
A series of hydrophilic poly(poly(ethylene glycol) methyl ether methacrylate) (PPEGMA) macroinitiators and stabilizers are synthesized in methanol through in situ photo‐controlled bromine‐iodine transformation living radical polymerization, where ethyl α‐bromophenylacetate (EBPA) is the initial initiator and is converted to an iodo‐type initiator in the presence of NaI. The subsequent photo‐controlled polymerization‐induced self‐assembly (photo‐PISA) process is achieved by adding a second monomer, hydrophobic benzyl methacrylate (BnMA), under irradiation with blue light emitting diode (LED) light at room temperature. The effect of the target degree of polymerization (DP) of PPEGMA, PBnMA, as well as the solids content on the self‐assembly behavior of block copolymer PPEGMA‐ b ‐PBnMA is evaluated by gel permeation chromatography (GPC), nuclear magnetic resonance (NMR) spectroscopy, transmission electron microscopy (TEM), and dynamic light scattering (DLS) characterization. Resulting uniform spherical micelles and vesicle aggregates are observed.