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Composition Conversion-induced Formation of Multicompartment Structures in the Ordered Aggregates of ABA Triblock Copolymers: A Monte Carlo Study
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DOI：10.11777/j.issn1000-3304.2025.25261.png)
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Abstract
En 中文
External stimuli can induce composition conversion in block copolymers, which can then lead to morphological transitions of the block copolymer aggregates from one ordered state to another, which has become a new strategy for regulating the morphological structure of block copolymers. Based on this, taking the classical ABA triblock copolymer ordered aggregates (such as cylinders and vesicles) as the initial state, the Monte Carlo simufation imetitor was used to investigate the microstructital changes in the hydrophobic parts of the cylinder and vesicle when part of the B blocks in the system were converted into C blocks (i.e., the ABA triblock copolymer in the system was transformed into the ABA/ACA triblock copolymer mixture). The simulation results indicated that by regulating the incompatibility between the B block and the newly generated C block, as well as the evolution time of the system, ordered aggregates with a single hydrophobic component could evolve into ordered aggregates with a variety of novel controllable multi-compartment structures that are rarely observed in linear terpolymer systems, such as segmented worm, Hamburg-type and Janus-type rods, pupa-like vesicles, softball-shaped vesicles, Janus-type and dumbbell-shaped vesicles. It is worth noting that some of the aforementioned structures, such as segmented worms and pupa-like vesicles, are difficult to obtain using traditional self-assembly methods (i.e., the system evolves from a disordered uniform solution state) under the same parameter conditions.
Keywords:
Block copolymer
Composition conversion
Multicompartment structure
Monte Carlo simulation
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