Small-Angle Neutron Scattering Study of the Structural Relaxation of Elongationally Oriented, Moderately Stretched Three-Arm Star Polymers

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Small-Angle Neutron Scattering Study of the Structural Relaxation of Elongationally Oriented, Moderately Stretched Three-Arm Star Polymers. / Mortensen, Kell; Borger, Anine L.; Kirkensgaard, Jacob J. K.; Huang, Qian; Hassager, Ole; Almdal, Kristoffer.

In: Physical Review Letters, Vol. 127, No. 16, 177801, 18.10.2021.

Research output: Contribution to journal › Letter › Research › peer-review

Harvard

Mortensen, K, Borger, AL, Kirkensgaard, JJK, Huang, Q, Hassager, O & Almdal, K 2021, 'Small-Angle Neutron Scattering Study of the Structural Relaxation of Elongationally Oriented, Moderately Stretched Three-Arm Star Polymers', Physical Review Letters, vol. 127, no. 16, 177801. https://doi.org/10.1103/PhysRevLett.127.177801

APA

Mortensen, K., Borger, A. L., Kirkensgaard, J. J. K., Huang, Q., Hassager, O., & Almdal, K. (2021). Small-Angle Neutron Scattering Study of the Structural Relaxation of Elongationally Oriented, Moderately Stretched Three-Arm Star Polymers. Physical Review Letters, 127(16), [177801]. https://doi.org/10.1103/PhysRevLett.127.177801

Vancouver

Mortensen K, Borger AL, Kirkensgaard JJK, Huang Q, Hassager O, Almdal K. Small-Angle Neutron Scattering Study of the Structural Relaxation of Elongationally Oriented, Moderately Stretched Three-Arm Star Polymers. Physical Review Letters. 2021 Oct 18;127(16). 177801. https://doi.org/10.1103/PhysRevLett.127.177801

Author

Mortensen, Kell ; Borger, Anine L. ; Kirkensgaard, Jacob J. K. ; Huang, Qian ; Hassager, Ole ; Almdal, Kristoffer. / Small-Angle Neutron Scattering Study of the Structural Relaxation of Elongationally Oriented, Moderately Stretched Three-Arm Star Polymers. In: Physical Review Letters. 2021 ; Vol. 127, No. 16.

Bibtex

@article{74f04a1969ed4b1b9e93205122ebbb2d,

title = "Small-Angle Neutron Scattering Study of the Structural Relaxation of Elongationally Oriented, Moderately Stretched Three-Arm Star Polymers",

abstract = "We present structural relaxation studies of a polystyrene star polymer after cessation of high-rate extensional flow. During the steady-state flow, the scattering pattern shows two sets of independent correlations peaks, reflecting the structure of a polymer confined in a fully oriented three-armed tube. Upon cessation of flow, the relaxation constitutes three distinct regimes. In a first regime, the perpendicular correlation peaks disappear, signifying disruption of the virtual tube. In a second regime, broad scattering arcs emerge, reflecting relaxation from highly aligned chains to more relaxed, still anisotropic form. New entanglements dominate the last relaxation regime where the scattering pattern evolves to a successively elliptical and circular pattern, reflecting relaxation via reptation.",

keywords = "STRESS",

author = "Kell Mortensen and Borger, {Anine L.} and Kirkensgaard, {Jacob J. K.} and Qian Huang and Ole Hassager and Kristoffer Almdal",

year = "2021",

month = oct,

day = "18",

doi = "10.1103/PhysRevLett.127.177801",

language = "English",

volume = "127",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "16",

}

RIS

TY - JOUR

T1 - Small-Angle Neutron Scattering Study of the Structural Relaxation of Elongationally Oriented, Moderately Stretched Three-Arm Star Polymers

AU - Mortensen, Kell

AU - Borger, Anine L.

AU - Kirkensgaard, Jacob J. K.

AU - Huang, Qian

AU - Hassager, Ole

AU - Almdal, Kristoffer

PY - 2021/10/18

Y1 - 2021/10/18

N2 - We present structural relaxation studies of a polystyrene star polymer after cessation of high-rate extensional flow. During the steady-state flow, the scattering pattern shows two sets of independent correlations peaks, reflecting the structure of a polymer confined in a fully oriented three-armed tube. Upon cessation of flow, the relaxation constitutes three distinct regimes. In a first regime, the perpendicular correlation peaks disappear, signifying disruption of the virtual tube. In a second regime, broad scattering arcs emerge, reflecting relaxation from highly aligned chains to more relaxed, still anisotropic form. New entanglements dominate the last relaxation regime where the scattering pattern evolves to a successively elliptical and circular pattern, reflecting relaxation via reptation.

AB - We present structural relaxation studies of a polystyrene star polymer after cessation of high-rate extensional flow. During the steady-state flow, the scattering pattern shows two sets of independent correlations peaks, reflecting the structure of a polymer confined in a fully oriented three-armed tube. Upon cessation of flow, the relaxation constitutes three distinct regimes. In a first regime, the perpendicular correlation peaks disappear, signifying disruption of the virtual tube. In a second regime, broad scattering arcs emerge, reflecting relaxation from highly aligned chains to more relaxed, still anisotropic form. New entanglements dominate the last relaxation regime where the scattering pattern evolves to a successively elliptical and circular pattern, reflecting relaxation via reptation.

KW - STRESS

U2 - 10.1103/PhysRevLett.127.177801

DO - 10.1103/PhysRevLett.127.177801

M3 - Letter

C2 - 34739279

VL - 127

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 16

M1 - 177801

ER -

ID: 282736786