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Journal article
Extreme Deflection of Phase Boundaries and Chain Bridging in A(BA')n Miktoarm Star Polymers
Macromolecules, v 53(2), pp 513-522
28 Jan 2020
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Abstract
In this study, we use self-consistent field theory to demonstrate that the A(BA')(n) miktoarm architecture can strongly deflect order-order phase boundaries to large volume fractions f(A). The A(BA')(n )architecture achieves this strong deflection by combining the effects of miktoarm frustration and block bidispersity and is shown to stabilize discrete spheres and cylinders of the A block up to values of f(A) = 0.58 and f(A) = 0.78, respectively. We next analyze the prevalence of chain bridging v B in both neat miktoarm melts and in homopolymer blends that form the fluctuation-stabilized "bricks and mortar" phase. These calculations demonstrate that high nu(B) and f(A) can both be simultaneously achieved with highly asymmetric miktoarm stars, a property especially useful for the design of tough thermoplastic elastomers. Finally, we show that these miktoarms exhibit large windows of phase space where the sigma and A15 Frank-Kasper phases are stable.
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Details
- Title
- Extreme Deflection of Phase Boundaries and Chain Bridging in A(BA')n Miktoarm Star Polymers
- Creators
- Joshua Lequieu - University of California, Santa BarbaraTrenton Koeper - University of California, Santa BarbaraKris T. Delaney - University of California, Santa BarbaraGlenn H. Fredrickson - University of California, Santa Barbara
- Publication Details
- Macromolecules, v 53(2), pp 513-522
- Publisher
- American Chemical Society; Washington, DC
- Number of pages
- 10
- Grant note
- NSF DMR 1720256 / Materials Research Science and Engineering Center (MRSEC) at UC Santa Barbara California NanoSystems Institute DE-SC0019001 / U.S. Department of Energy, Office of Basic Energy Sciences; United States Department of Energy (DOE) CNS-1725797 / National Science Foundation; National Science Foundation (NSF)
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Chemical and Biological Engineering
- Web of Science ID
- WOS:000510530300003
- Scopus ID
- 2-s2.0-85078469972
- Other Identifier
- 991021519115304721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Polymer Science