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Molecular dynamics simulations of oligoester brushes: The origin of unusual conformations. / Glova, A. D.; Larin, S. V.; Falkovich, S. G.; Nazarychev, V. M.; Tolmachev, D. A.; Lukasheva, N. V.; Lyulin, S. V.

In: Soft Matter, Vol. 13, No. 37, 01.01.2017, p. 6627-6638.

Research output: Contribution to journalArticlepeer-review

Harvard

Glova, AD, Larin, SV, Falkovich, SG, Nazarychev, VM, Tolmachev, DA, Lukasheva, NV & Lyulin, SV 2017, 'Molecular dynamics simulations of oligoester brushes: The origin of unusual conformations', Soft Matter, vol. 13, no. 37, pp. 6627-6638. https://doi.org/10.1039/c7sm01419h

APA

Vancouver

Glova AD, Larin SV, Falkovich SG, Nazarychev VM, Tolmachev DA, Lukasheva NV et al. Molecular dynamics simulations of oligoester brushes: The origin of unusual conformations. Soft Matter. 2017 Jan 1;13(37):6627-6638. https://doi.org/10.1039/c7sm01419h

Author

Glova, A. D. ; Larin, S. V. ; Falkovich, S. G. ; Nazarychev, V. M. ; Tolmachev, D. A. ; Lukasheva, N. V. ; Lyulin, S. V. / Molecular dynamics simulations of oligoester brushes: The origin of unusual conformations. In: Soft Matter. 2017 ; Vol. 13, No. 37. pp. 6627-6638.

BibTeX

@article{450019ce669245069fe635413d43b828,
title = "Molecular dynamics simulations of oligoester brushes: The origin of unusual conformations",
abstract = "{\textcopyright} 2017 The Royal Society of Chemistry. We present results from all-atom molecular dynamics simulations for the structural properties of oligomeric lactic acid chains (OLA) grafted to the surface of cellulose nanocrystals (CNCs) and immersed in the melt of polylactic acid (PLA). Earlier, we have found that the distribution of free ends of OLA molecules is bimodal [Glova et al., Polym. Int., 2016, 65(8), 892]. The results cannot be explained within the standard picture of uncharged polymer brushes exposed to the melt of a chemically identical polymer. Although the oligomeric brushes of the OLA chains are uncharged, they have partial polarization charges producing a non-zero dipole moment of the monomeric chain unit. We study the influence of partial charges on the structure of the layer of OLA chains grafted to the CNC surface. A detailed analysis of the conformations of the grafted chains shows that interaction of partial charges in the models causes bending of the OLA molecules toward the cellulose surface, forming a hairpin structure. The observed separation of the grafted chains into two populations increases with grafting density. We demonstrate that hydrogen bonds can be formed between the free ends of the grafted chains and the CNC surface, but they do not affect the brush structure significantly. Thus, dipole-dipole interactions turn out to be the key factor governing the unusual conformations of grafts.",
author = "Glova, {A. D.} and Larin, {S. V.} and Falkovich, {S. G.} and Nazarychev, {V. M.} and Tolmachev, {D. A.} and Lukasheva, {N. V.} and Lyulin, {S. V.}",
year = "2017",
month = jan,
day = "1",
doi = "10.1039/c7sm01419h",
language = "English",
volume = "13",
pages = "6627--6638",
journal = "Soft Matter",
issn = "1744-683X",
publisher = "Royal Society of Chemistry",
number = "37",

}

RIS

TY - JOUR

T1 - Molecular dynamics simulations of oligoester brushes: The origin of unusual conformations

AU - Glova, A. D.

AU - Larin, S. V.

AU - Falkovich, S. G.

AU - Nazarychev, V. M.

AU - Tolmachev, D. A.

AU - Lukasheva, N. V.

AU - Lyulin, S. V.

PY - 2017/1/1

Y1 - 2017/1/1

N2 - © 2017 The Royal Society of Chemistry. We present results from all-atom molecular dynamics simulations for the structural properties of oligomeric lactic acid chains (OLA) grafted to the surface of cellulose nanocrystals (CNCs) and immersed in the melt of polylactic acid (PLA). Earlier, we have found that the distribution of free ends of OLA molecules is bimodal [Glova et al., Polym. Int., 2016, 65(8), 892]. The results cannot be explained within the standard picture of uncharged polymer brushes exposed to the melt of a chemically identical polymer. Although the oligomeric brushes of the OLA chains are uncharged, they have partial polarization charges producing a non-zero dipole moment of the monomeric chain unit. We study the influence of partial charges on the structure of the layer of OLA chains grafted to the CNC surface. A detailed analysis of the conformations of the grafted chains shows that interaction of partial charges in the models causes bending of the OLA molecules toward the cellulose surface, forming a hairpin structure. The observed separation of the grafted chains into two populations increases with grafting density. We demonstrate that hydrogen bonds can be formed between the free ends of the grafted chains and the CNC surface, but they do not affect the brush structure significantly. Thus, dipole-dipole interactions turn out to be the key factor governing the unusual conformations of grafts.

AB - © 2017 The Royal Society of Chemistry. We present results from all-atom molecular dynamics simulations for the structural properties of oligomeric lactic acid chains (OLA) grafted to the surface of cellulose nanocrystals (CNCs) and immersed in the melt of polylactic acid (PLA). Earlier, we have found that the distribution of free ends of OLA molecules is bimodal [Glova et al., Polym. Int., 2016, 65(8), 892]. The results cannot be explained within the standard picture of uncharged polymer brushes exposed to the melt of a chemically identical polymer. Although the oligomeric brushes of the OLA chains are uncharged, they have partial polarization charges producing a non-zero dipole moment of the monomeric chain unit. We study the influence of partial charges on the structure of the layer of OLA chains grafted to the CNC surface. A detailed analysis of the conformations of the grafted chains shows that interaction of partial charges in the models causes bending of the OLA molecules toward the cellulose surface, forming a hairpin structure. The observed separation of the grafted chains into two populations increases with grafting density. We demonstrate that hydrogen bonds can be formed between the free ends of the grafted chains and the CNC surface, but they do not affect the brush structure significantly. Thus, dipole-dipole interactions turn out to be the key factor governing the unusual conformations of grafts.

UR - http://www.scopus.com/inward/record.url?scp=85030252676&partnerID=8YFLogxK

U2 - 10.1039/c7sm01419h

DO - 10.1039/c7sm01419h

M3 - Article

C2 - 28926071

AN - SCOPUS:85030252676

VL - 13

SP - 6627

EP - 6638

JO - Soft Matter

JF - Soft Matter

SN - 1744-683X

IS - 37

ER -

ID: 128033407