Dynamics of vitrimers: defects as a highway to stress relaxation

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Uittreksel

We propose a coarse-grained model to investigate stress relaxation in star-polymer networks induced by dynamic bond-exchange processes. We show how the swapping mechanism, once activated, allows the network to reconfigure, exploring distinct topological configurations, all of them characterized by complete extent of reaction. Our results reveal the important role played by topological defects in mediating the exchange reaction and speeding up stress relaxation. The model provides a representation of the dynamics in vitrimers, a new class of polymers characterized by bond-swap mechanisms which preserve the total number of bonds, as well as in other bond-exchange materials.
TaalEngels
Artikelnummer058003
Aantal pagina's5
TijdschriftPhysical Review Letters
Volume121
Nummer van het tijdschrift5
DOI's
StatusGepubliceerd - 31 jul 2018

Vingerafdruk

stress relaxation
defects
polymers
stars
configurations

Citeer dit

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title = "Dynamics of vitrimers: defects as a highway to stress relaxation",
abstract = "We propose a coarse-grained model to investigate stress relaxation in star-polymer networks induced by dynamic bond-exchange processes. We show how the swapping mechanism, once activated, allows the network to reconfigure, exploring distinct topological configurations, all of them characterized by complete extent of reaction. Our results reveal the important role played by topological defects in mediating the exchange reaction and speeding up stress relaxation. The model provides a representation of the dynamics in vitrimers, a new class of polymers characterized by bond-swap mechanisms which preserve the total number of bonds, as well as in other bond-exchange materials.",
author = "Simone Ciarella and Francesco Sciortino and Ellenbroek, {Wouter G.}",
year = "2018",
month = "7",
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doi = "10.1103/PhysRevLett.121.058003",
language = "English",
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journal = "Physical Review Letters",
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Dynamics of vitrimers: defects as a highway to stress relaxation. / Ciarella, Simone; Sciortino, Francesco; Ellenbroek, Wouter G.

In: Physical Review Letters, Vol. 121, Nr. 5, 058003, 31.07.2018.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

TY - JOUR

T1 - Dynamics of vitrimers: defects as a highway to stress relaxation

AU - Ciarella,Simone

AU - Sciortino,Francesco

AU - Ellenbroek,Wouter G.

PY - 2018/7/31

Y1 - 2018/7/31

N2 - We propose a coarse-grained model to investigate stress relaxation in star-polymer networks induced by dynamic bond-exchange processes. We show how the swapping mechanism, once activated, allows the network to reconfigure, exploring distinct topological configurations, all of them characterized by complete extent of reaction. Our results reveal the important role played by topological defects in mediating the exchange reaction and speeding up stress relaxation. The model provides a representation of the dynamics in vitrimers, a new class of polymers characterized by bond-swap mechanisms which preserve the total number of bonds, as well as in other bond-exchange materials.

AB - We propose a coarse-grained model to investigate stress relaxation in star-polymer networks induced by dynamic bond-exchange processes. We show how the swapping mechanism, once activated, allows the network to reconfigure, exploring distinct topological configurations, all of them characterized by complete extent of reaction. Our results reveal the important role played by topological defects in mediating the exchange reaction and speeding up stress relaxation. The model provides a representation of the dynamics in vitrimers, a new class of polymers characterized by bond-swap mechanisms which preserve the total number of bonds, as well as in other bond-exchange materials.

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DO - 10.1103/PhysRevLett.121.058003

M3 - Article

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JO - Physical Review Letters

T2 - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

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