Synthesis of poly(styrene)-b-poly(2-vinyl pyridine) four-arm star block copolymers via ATRP and their self-assembly behaviors

In this study, synthesis of poly (styrene)-b-poly (2-vinyl pyridine) four-arm star block copolymers ((PS-b-P2VP)4 sBCPs) possessing high interaction parameter (χ) feature was investigated. To obtain well-defined sBCPs, a challenge on ATRP of pyridine-containing monomers is foreseeable. We thus scrut...

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Bibliographic Details
Published in:Polymer (Guilford) 2021-01, Vol.213, p.123212, Article 123212
Main Authors: Hsu, Chia-Juei, Tu, Cheng-Wei, Huang, Yu-Wen, Kuo, Shiao-Wei, Lee, Rong-Ho, Liu, Yu-Ting, Hsueh, Han-Yu, Aimi, Junko, Huang, Chih-Feng
Format: Article
Language:English
Subjects:
Atom transfer radical polymerization
Atomic force microscopes
Atomic force microscopy
Block copolymers
Chains
Copolymers
Halides
Interaction parameters
Lamellae
Microscopes
Monomers
Morphology
poly(2-vinyl pyridine)
poly(styrene)
Polymer self-assembly
Polystyrene resins
Polyvinyl pyridine
Pyridines
Self-assembly
Small angle X ray scattering
Star block copolymers
Styrene
Styrenes
Substitution reactions
Transmission electron microscopy
X-ray scattering
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Summary:In this study, synthesis of poly (styrene)-b-poly (2-vinyl pyridine) four-arm star block copolymers ((PS-b-P2VP)4 sBCPs) possessing high interaction parameter (χ) feature was investigated. To obtain well-defined sBCPs, a challenge on ATRP of pyridine-containing monomers is foreseeable. We thus scrutinized the domino effect from PS macroinitiators (MIs) having different halogen chain ends (i.e., (PS–X)4, where X = Br/Cl) to the subsequent chain extensions. As evident from the model reactions of benzyl halides (BzX, where X = Br/Cl) and 2-methylpyridine (2 MP), the combination of BzCl and 2 MP can significantly suppress the substitution side reaction. Consequently, well-defined (PS-b-P2VP)4 sBCPs were obtained (Mn = ca. 58 k–82 k with PDI
ISSN:0032-3861
1873-2291
DOI:10.1016/j.polymer.2020.123212