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- W2780647510 abstract "We study the dilute aqueous solutions of poly(ethylene oxide) (PEO) oligomers that are subject to an elongating force dipole acting on both chain ends using atomistic molecular dynamics. By increasing the force, liquid–liquid demixing can be observed at room temperature far below the lower critical solution temperature. For forces above 35 pN, fibrillar nanostructures are spontaneously formed related to a decrease in hydrogen bonding between PEO and water. Most notable is a rapid decrease in the bifurcated hydrogen bonds during stretching, which can also be observed for isolated single chains. The phase-segregated structures display signs of chain ordering, but a clear signature of the crystalline order is not obtained during the simulation time, indicating a liquid–liquid phase transition induced by chain stretching. Our results indicate that the solvent quality of the aqueous solution of PEO depends on the conformational state of the chains, which is most likely related to the specific hydrogen-bond-induced solvation of PEO in water. The strain-induced demixing of PEO opens the possibility to obtain polymer fibers with low energy costs because crystallization starts via the strain-induced demixing in the extended state only." @default.
- W2780647510 created "2018-01-05" @default.
- W2780647510 creator A5063692628 @default.
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- W2780647510 date "2018-01-02" @default.
- W2780647510 modified "2023-10-14" @default.
- W2780647510 title "Molecular Dynamics Simulations of Strain-Induced Phase Transition of Poly(ethylene oxide) in Water" @default.
- W2780647510 cites W1929789392 @default.
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- W2780647510 doi "https://doi.org/10.1021/acs.jpcb.7b10793" @default.
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