Baek, Kyung-Youl
Lee, Sang-Hyup
Hwang, Seung Sang
2024-01-20T17:03:39Z
2024-01-20T17:03:39Z
2021-09-02
2011-05
1598-5032
https://pubs.kist.re.kr/handle/201004/130401
Well-defined photo and pH-sensitive amphiphilic star block copolymers were synthesized by copper based atom transfer radical polymerization, which consisted of a hydrophilic pH sensitive shell and photosensitive hydrophobic core structure. For this, photosensitive n-butyl acrylate (nBA) star polymer was synthesized with a multi-functionalized initiator including Pd-coordinated porphyrin in combination with CuBr and 4,4'-dinonyl-2,2'-bipyridyl (dNbpy) (PDI < 1.09). This hydrophobic photosensitive nBA star polymer was then used as a macroinitiator and polymerized with N,N'-dimethylamino ethyl methacrylate (DMAEMA) in the CuCl/CuCl(2)/dNbpy catalytic system to synthesize PnBA-PDMAEMA star block copolymer, where the PDMAEMA block segment worked as a base exterior. For the arm chain consisted of an acid exterior block segment, the nBA star polymer macroinitiator was polymerized with tert-butyl acrylate (tBA) in the CuBr/dNbpy catalytic system to synthesize the PnBA-PtBA star block copolymer followed by a treatment with strong acid for deprotecting the tert-butyl groups in the PtBA block segment to give PnBA-poly(acrylic acid) (PAA) star block copolymer. Both amphiphilic photosensitive star block copolymers showed well defined molecular weights with narrow polydispersities (PDI < 1.23).
English
SPRINGER
LIVING RADICAL POLYMERIZATION
N-BUTYL METHACRYLATE
PHOTODYNAMIC THERAPY
POLYMERS
ARMS
Synthesis of amphiphilic star block copolymer with photosensitive core by ATRP
Article
10.1007/s13233-011-0508-6
1
MACROMOLECULAR RESEARCH, v.19, no.5, pp.461 - 467
MACROMOLECULAR RESEARCH
19
5
461
467
scie
scopus
kci
ART001552961
000290941800007
2-s2.0-79960049454
Polymer Science
Polymer Science
Article
LIVING RADICAL POLYMERIZATION
N-BUTYL METHACRYLATE
PHOTODYNAMIC THERAPY
POLYMERS
ARMS
star polymers
amphiphilic block copolymers
photosensitizer
atom transfer radical polymerization (ATRP)