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Title: Stable and unstable tiling patterns formed by ABC miktoarm star triblock terpolymers of symmetric interactions

Journal Article · · Physical Review Materials

Several discrepancies exist among previous self-consistent field calculations of symmetrically interacting ABC miktoarm star triblock terpolymer melts. Here we address this issue by including all known tiling patterns, as well as several lamellar-type phases known to bound the regions in the parameter space occupied by these patterns. After carefully studying the effect of numerical parameters on the free-energy accuracy, the central region of the phase diagram is constructed in detail; both the (3.4.6.4) pattern and the three-dimensional phase of hierarchical-hexagonal lamellae are found to be stable for the first time. The energetic and entropic contributions to the free-energy density of several phases are analyzed and compared in detail to reveal their stability mechanisms, including the important ( 3 2 .4.3.4) pattern. Comparisons to previous studies of the same model system are present throughout, with our results resolving the aforementioned discrepancies and providing a sound basis for future work to build upon. Published by the American Physical Society 2024

Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0023203
OSTI ID:
2336614
Journal Information:
Physical Review Materials, Journal Name: Physical Review Materials Journal Issue: 4 Vol. 8; ISSN PRMHAR; ISSN 2475-9953
Publisher:
American Physical SocietyCopyright Statement
Country of Publication:
United States
Language:
English

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