New insight into microstructure-mediated segmental dynamics in select model poly(urethane urea) elastomers

Alex J. Hsieh; Tanya L. Chantawansri; Weiguo Hu; Kenneth E. Strawhecker; Daniel T. Casem; Jeffrey K. Eliason; Keith A. Nelson; Ethan M. Parsons

doi:10.1016/j.polymer.2014.02.037

New insight into microstructure-mediated segmental dynamics in select model poly(urethane urea) elastomers

Alex J. Hsieh, Tanya L. Chantawansri, Weiguo Hu, Kenneth E. Strawhecker, Daniel T. Casem, Jeffrey K. Eliason, Keith A. Nelson, Ethan M. Parsons

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

26 Scopus citations

Abstract

Segmental dynamics in a series of 4,4′-dicyclohexylmethane diisocyanate-diethyltoluenediamine-poly(tetramethylene oxide) based poly(urethane urea) (PUU) elastomers have been investigated through a multi-scale characterization approach. This includes broadband dielectric analysis, solid-state nuclear magnetic resonance (NMR), plate impact, and impulsive stimulated scattering. Dielectric relaxation measurements applicable at frequencies up to 10⁶ Hz are useful for interpreting the high strain-rate deformation response; i.e. at the moment of target interaction with an accelerating impact or MHz stress wave excitation. Additionally, the capability of solid-state NMR to differentiate the microstructure-mediated segmental dynamics; correspondingly, the presence of a rigid phase (those in the phase-mixed regions) and a mobile phase associated with the soft-segment domains is demonstrated. These new insights not only further elucidate the microstructure details discerned through atomic force microscopy, but also enable the prediction of the macroscopically dynamic response in these model PUUs, particularly on the temporal scale over the range of μs-ns.

Original language	English (US)
Pages (from-to)	1883-1892
Number of pages	10
Journal	Polymer
Volume	55
Issue number	7
DOIs	https://doi.org/10.1016/j.polymer.2014.02.037
State	Published - Apr 1 2014
Externally published	Yes

Bibliographical note

Funding Information:
AJH and TLC acknowledge funding support from the Army Research Laboratory (ARL) Director's Research Initiative program. AJH, JKE, KAN and EMP also acknowledge collaboration opportunity through funding support by the U.S. Army through the Institute for Soldier Nanotechnologies (ISN), under Contract W911NF-07-D-0004. WH thanks the Army Research Office for funding, also the University of Massachusetts-Amherst Materials Research Science and Engineering Center (MRSEC) and the Materials Research Facilities Network (MRFN) for supporting the use of DSX300 solid-state NMR instrument. AJH acknowledges Dr. Richard C. Becker of ARL for the review and critical comments for this manuscript. AJH also thank Dr. Norm Rice of Triton Systems, Inc. (Chelmsford, MA) for providing PUU materials, through an ISN project funded by the Army.

Keywords

Dynamic strain-rate sensitivity
Poly(urethane urea) elastomers
Segmental dynamics

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10.1016/j.polymer.2014.02.037

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@article{fd8404b54bd24829b437ef9465c792ce,

title = "New insight into microstructure-mediated segmental dynamics in select model poly(urethane urea) elastomers",

abstract = "Segmental dynamics in a series of 4,4′-dicyclohexylmethane diisocyanate-diethyltoluenediamine-poly(tetramethylene oxide) based poly(urethane urea) (PUU) elastomers have been investigated through a multi-scale characterization approach. This includes broadband dielectric analysis, solid-state nuclear magnetic resonance (NMR), plate impact, and impulsive stimulated scattering. Dielectric relaxation measurements applicable at frequencies up to 106 Hz are useful for interpreting the high strain-rate deformation response; i.e. at the moment of target interaction with an accelerating impact or MHz stress wave excitation. Additionally, the capability of solid-state NMR to differentiate the microstructure-mediated segmental dynamics; correspondingly, the presence of a rigid phase (those in the phase-mixed regions) and a mobile phase associated with the soft-segment domains is demonstrated. These new insights not only further elucidate the microstructure details discerned through atomic force microscopy, but also enable the prediction of the macroscopically dynamic response in these model PUUs, particularly on the temporal scale over the range of μs-ns.",

keywords = "Dynamic strain-rate sensitivity, Poly(urethane urea) elastomers, Segmental dynamics",

author = "Hsieh, \{Alex J.\} and Chantawansri, \{Tanya L.\} and Weiguo Hu and Strawhecker, \{Kenneth E.\} and Casem, \{Daniel T.\} and Eliason, \{Jeffrey K.\} and Nelson, \{Keith A.\} and Parsons, \{Ethan M.\}",

note = "Funding Information: AJH and TLC acknowledge funding support from the Army Research Laboratory (ARL) Director's Research Initiative program. AJH, JKE, KAN and EMP also acknowledge collaboration opportunity through funding support by the U.S. Army through the Institute for Soldier Nanotechnologies (ISN), under Contract W911NF-07-D-0004. WH thanks the Army Research Office for funding, also the University of Massachusetts-Amherst Materials Research Science and Engineering Center (MRSEC) and the Materials Research Facilities Network (MRFN) for supporting the use of DSX300 solid-state NMR instrument. AJH acknowledges Dr. Richard C. Becker of ARL for the review and critical comments for this manuscript. AJH also thank Dr. Norm Rice of Triton Systems, Inc. (Chelmsford, MA) for providing PUU materials, through an ISN project funded by the Army. ",

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doi = "10.1016/j.polymer.2014.02.037",

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AU - Hsieh, Alex J.

AU - Chantawansri, Tanya L.

AU - Hu, Weiguo

AU - Strawhecker, Kenneth E.

AU - Casem, Daniel T.

AU - Eliason, Jeffrey K.

AU - Nelson, Keith A.

AU - Parsons, Ethan M.

N1 - Funding Information: AJH and TLC acknowledge funding support from the Army Research Laboratory (ARL) Director's Research Initiative program. AJH, JKE, KAN and EMP also acknowledge collaboration opportunity through funding support by the U.S. Army through the Institute for Soldier Nanotechnologies (ISN), under Contract W911NF-07-D-0004. WH thanks the Army Research Office for funding, also the University of Massachusetts-Amherst Materials Research Science and Engineering Center (MRSEC) and the Materials Research Facilities Network (MRFN) for supporting the use of DSX300 solid-state NMR instrument. AJH acknowledges Dr. Richard C. Becker of ARL for the review and critical comments for this manuscript. AJH also thank Dr. Norm Rice of Triton Systems, Inc. (Chelmsford, MA) for providing PUU materials, through an ISN project funded by the Army.

PY - 2014/4/1

Y1 - 2014/4/1

N2 - Segmental dynamics in a series of 4,4′-dicyclohexylmethane diisocyanate-diethyltoluenediamine-poly(tetramethylene oxide) based poly(urethane urea) (PUU) elastomers have been investigated through a multi-scale characterization approach. This includes broadband dielectric analysis, solid-state nuclear magnetic resonance (NMR), plate impact, and impulsive stimulated scattering. Dielectric relaxation measurements applicable at frequencies up to 106 Hz are useful for interpreting the high strain-rate deformation response; i.e. at the moment of target interaction with an accelerating impact or MHz stress wave excitation. Additionally, the capability of solid-state NMR to differentiate the microstructure-mediated segmental dynamics; correspondingly, the presence of a rigid phase (those in the phase-mixed regions) and a mobile phase associated with the soft-segment domains is demonstrated. These new insights not only further elucidate the microstructure details discerned through atomic force microscopy, but also enable the prediction of the macroscopically dynamic response in these model PUUs, particularly on the temporal scale over the range of μs-ns.

AB - Segmental dynamics in a series of 4,4′-dicyclohexylmethane diisocyanate-diethyltoluenediamine-poly(tetramethylene oxide) based poly(urethane urea) (PUU) elastomers have been investigated through a multi-scale characterization approach. This includes broadband dielectric analysis, solid-state nuclear magnetic resonance (NMR), plate impact, and impulsive stimulated scattering. Dielectric relaxation measurements applicable at frequencies up to 106 Hz are useful for interpreting the high strain-rate deformation response; i.e. at the moment of target interaction with an accelerating impact or MHz stress wave excitation. Additionally, the capability of solid-state NMR to differentiate the microstructure-mediated segmental dynamics; correspondingly, the presence of a rigid phase (those in the phase-mixed regions) and a mobile phase associated with the soft-segment domains is demonstrated. These new insights not only further elucidate the microstructure details discerned through atomic force microscopy, but also enable the prediction of the macroscopically dynamic response in these model PUUs, particularly on the temporal scale over the range of μs-ns.

KW - Dynamic strain-rate sensitivity

KW - Poly(urethane urea) elastomers

KW - Segmental dynamics

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DO - 10.1016/j.polymer.2014.02.037

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SP - 1883

EP - 1892

JO - Polymer

JF - Polymer

IS - 7

ER -

New insight into microstructure-mediated segmental dynamics in select model poly(urethane urea) elastomers

Abstract

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Keywords

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