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- Title
Photo‐Controlled Polymerization‐Induced Self‐Assembly (Photo‐PISA): A Novel Strategy Using In Situ Bromine‐Iodine Transformation Living Radical Polymerization.
- Authors
Xu, Qinghua; Tian, Chun; Zhang, Lifen; Cheng, Zhenping; Zhu, Xiulin
- Abstract
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. A facile and novel photo‐controlled polymerization‐induced self‐assembly (photo‐PISA) strategy is successfully constructed in methanol via in situ bromine‐iodine transformation living radical polymerization under irradiation with blue light emitting diode (LED) light at room temperature.
- Subjects
POLYMERIZATION; BROMINE; IODINE; GEL permeation chromatography; TRANSMISSION electron microscopy
- Publication
Macromolecular Rapid Communications, 2019, Vol 40, Issue 2, pN.PAG
- ISSN
1022-1336
- Publication type
Article
- DOI
10.1002/marc.201800327