Construction of micelles and hollow spheres via the self-assembly behavior of poly(styrene- alt-p HPMI) copolymers with poly(4-vinylpyridine) derivatives mediated by hydrogen bonding interactions

This study describes the preparation of hydrogen bonding connected micelles, consisting of a poly(styrene- -( -hydroxyphenylmaleimide)) [poly(S- -pHPMI)] core and a poly(4-vinylpyridine) (P4VP) derivative shell in a selective solvent. The aim was to modify hydrogen bonding interaction sites at the c...

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Bibliographic Details
Published in:Soft matter 2023-06, Vol.19 (25), p.4706-4716
Main Authors: Ma, Tzu-Ling, Du, Wei-Ting, Kuo, Shiao-Wei
Format: Article
Language:English
Subjects:
Block copolymers
Bonding agents
Bonding strength
Copolymers
Crosslinking
Dissolution
Hydrogen bonding
Hydrogen bonds
Micelles
Polymers
Polystyrene resins
Polyvinyl pyridine
Self-assembly
Styrene
Styrenes
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Summary:This study describes the preparation of hydrogen bonding connected micelles, consisting of a poly(styrene- -( -hydroxyphenylmaleimide)) [poly(S- -pHPMI)] core and a poly(4-vinylpyridine) (P4VP) derivative shell in a selective solvent. The aim was to modify hydrogen bonding interaction sites at the core/shell interface by synthesizing P4VP derivatives in three different sequences, namely, P4VP homopolymers, PS- -P4VP random copolymers, and block copolymers. TEM images showed the successful self-assembly of poly(S- -pHPMI)/PS- -P4VP inter-polymer complexes into spherical structures. To dissolve the core structures, 1,4-dibromobutane was used as a cross-linking agent to tighten the PS- -P4VP shell. The morphologies, particle sizes, hydrogen bonding, cross-linking reaction, and core dissolution were confirmed by TEM, DLS, FTIR, and AFM analyses. Poly(S- HPMI)/PS - -P4VP hydrogen bonding connected micelles, cross-linked micelles, and hollow spheres were larger and more irregular than poly(S- HPMI)/P4VP inter-polymer complexes due to the random copolymer architecture and the decrease in intermolecular hydrogen bonds. However, poly(S- HPMI)/PS - -P4VP resulted in rod- or worm-like structures after core dissolution.
ISSN:1744-683X
1744-6848
DOI:10.1039/d3sm00595j