Erratum to “Predicting the phase behavior of ABAC tetrablock terpolymers: Sensitivity to Flory–Huggins interaction parameters” [Polymer, 154 (2018), 305–314]

Arora, Akash; Pillai, Naveen; Bates, Frank S.; Dorfman, Kevin D.

doi:10.1016/j.polymer.2020.123038

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“…Furthermore, our approach includes a correction factor, Γ, to account for the small degrees of polydispersity and compositional asymmetry that always occur in real polymers. Arora et al 13,56 previously compared the Morse calibration to that of fitting ODTs to eq 1 for PS-PI and PS-PEO diblocks and found reasonable agreement even without accounting for polydispersity or compositional asymmetry. In Figure 11, the dotted line shows the Morse-type calibration from ref 31 for PLA-PI diblocks, obtained by fitting S(q*) from a single diblock to simulations with an equivalent polydispersity of Đ = 1.10.…”

Section: ■ Discussionmentioning

confidence: 99%

Simple and Accurate Calibration of the Flory–Huggins Interaction Parameter

2020

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This paper improves upon a standard method of determining the Flory–Huggins χ parameter, whereby experimental order–disorder transitions (ODTs) of symmetric diblock polymer melts are fit to the mean-field prediction, (χN)ODT = 10.495. The improvement is achieved by switching to an accurate prediction of (χN)ODT from Glaser et al. (Phys. Rev. Lett. 2014, 113, 068302), supplemented with corrections for the small degrees of polydispersity and compositional asymmetry that inevitably exist in real diblock polymers. The first correction is evaluated by simulating polydisperse diblocks over a wide range of invariant polymerization indices, and the second correction is extracted from analogous simulations for compositionally asymmetric diblocks by Ghasimakbari and Morse (Macromolecules 2020, 53, 7399). The resulting calibration method is then demonstrated on 19 different chemical pairs, using previously published experimental data. It provides a considerable increase in accuracy, but yet is nearly as simple to apply as the original version.

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Section: ■ Discussionmentioning

confidence: 99%