Novel thermoplastic polyhydroxyurethane elastomers as effective damping materials over broad temperature ranges

Goliath Beniah; Kun Liu; William H. Heath; Matthew D. Miller; Karl A. Scheidt; John M. Torkelson

doi:10.1016/j.eurpolymj.2016.05.031

Novel thermoplastic polyhydroxyurethane elastomers as effective damping materials over broad temperature ranges

Goliath Beniah, Kun Liu, William H. Heath, Matthew D. Miller, Karl A. Scheidt, John M. Torkelson^*

^*Corresponding author for this work

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

103 Scopus citations

Abstract

Non-isocyanate thermoplastic polyhydroxyurethane (PHU) elastomers were synthesized from cyclic carbonate aminolysis using polytetramethylene oxide (PTMO) as soft segment and divinylbenzene dicyclocarbonate and three diamine chain extenders as hard segment with a range of hard-segment content. Characterization was done via Fourier transform infrared spectroscopy, small-angle X-ray scattering (SAXS), uniaxial tensile testing, and dynamic mechanical analysis (DMA). SAXS reveals that these PHUs possess nanophase-separated morphology with 10–20 nm interdomain spacings. These PHUs display elastomeric response and tunable tensile properties with Young's modulus ranging from 27 to 200 MPa, tensile strength from 0.3 to 9.7 MPa and elongation at break ranging up to greater than 2000%. DMA reveals that nanophase separation in these PHUs is accompanied by broad interphases having a wide range of local composition; this nanophase separation differs significantly from that manifested by thermoplastic polyurethane elastomer (TPU) due to hydrogen bonding of hydroxyl groups in the hard segments to the PTMO soft segment. These PHUs show very good damping performance with tan δ ⩾ 0.30 over broad temperature ranges (⩾60 °C), which are tunable through simple variation of hard-segment content and chain extender structures.

Original language	English (US)
Pages (from-to)	770-783
Number of pages	14
Journal	European Polymer Journal
Volume	84
DOIs	https://doi.org/10.1016/j.eurpolymj.2016.05.031
State	Published - Nov 1 2016

Funding

This research was supported by the University Partnership Initiative between Northwestern University and The Dow Chemical Company . This work made use of central facilities supported by the MRSEC program of the National Science Foundation ( DMR-1121262 ) at the Northwestern University Materials Research Science and Engineering Center as well as facilities supported by Northwestern University at the Integrated Molecular Structure Education and Research Center. We also thank Dr. Junho Jeon and Ms. Alicia Scott from The Dow Chemical Company, Analytical Sciences lab, Freeport, TX for their help with molecular weight characterization.

Keywords

Damping material
Non-isocyanate
Polyhydroxyurethane
Polyurethane

ASJC Scopus subject areas

General Physics and Astronomy
Polymers and Plastics
Organic Chemistry
Materials Chemistry

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10.1016/j.eurpolymj.2016.05.031

Cite this

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title = "Novel thermoplastic polyhydroxyurethane elastomers as effective damping materials over broad temperature ranges",

abstract = "Non-isocyanate thermoplastic polyhydroxyurethane (PHU) elastomers were synthesized from cyclic carbonate aminolysis using polytetramethylene oxide (PTMO) as soft segment and divinylbenzene dicyclocarbonate and three diamine chain extenders as hard segment with a range of hard-segment content. Characterization was done via Fourier transform infrared spectroscopy, small-angle X-ray scattering (SAXS), uniaxial tensile testing, and dynamic mechanical analysis (DMA). SAXS reveals that these PHUs possess nanophase-separated morphology with 10–20 nm interdomain spacings. These PHUs display elastomeric response and tunable tensile properties with Young's modulus ranging from 27 to 200 MPa, tensile strength from 0.3 to 9.7 MPa and elongation at break ranging up to greater than 2000%. DMA reveals that nanophase separation in these PHUs is accompanied by broad interphases having a wide range of local composition; this nanophase separation differs significantly from that manifested by thermoplastic polyurethane elastomer (TPU) due to hydrogen bonding of hydroxyl groups in the hard segments to the PTMO soft segment. These PHUs show very good damping performance with tan δ ⩾ 0.30 over broad temperature ranges (⩾60 °C), which are tunable through simple variation of hard-segment content and chain extender structures.",

keywords = "Damping material, Non-isocyanate, Polyhydroxyurethane, Polyurethane",

author = "Goliath Beniah and Kun Liu and Heath, {William H.} and Miller, {Matthew D.} and Scheidt, {Karl A.} and Torkelson, {John M.}",

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AU - Beniah, Goliath

AU - Liu, Kun

AU - Heath, William H.

AU - Miller, Matthew D.

AU - Scheidt, Karl A.

AU - Torkelson, John M.

PY - 2016/11/1

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N2 - Non-isocyanate thermoplastic polyhydroxyurethane (PHU) elastomers were synthesized from cyclic carbonate aminolysis using polytetramethylene oxide (PTMO) as soft segment and divinylbenzene dicyclocarbonate and three diamine chain extenders as hard segment with a range of hard-segment content. Characterization was done via Fourier transform infrared spectroscopy, small-angle X-ray scattering (SAXS), uniaxial tensile testing, and dynamic mechanical analysis (DMA). SAXS reveals that these PHUs possess nanophase-separated morphology with 10–20 nm interdomain spacings. These PHUs display elastomeric response and tunable tensile properties with Young's modulus ranging from 27 to 200 MPa, tensile strength from 0.3 to 9.7 MPa and elongation at break ranging up to greater than 2000%. DMA reveals that nanophase separation in these PHUs is accompanied by broad interphases having a wide range of local composition; this nanophase separation differs significantly from that manifested by thermoplastic polyurethane elastomer (TPU) due to hydrogen bonding of hydroxyl groups in the hard segments to the PTMO soft segment. These PHUs show very good damping performance with tan δ ⩾ 0.30 over broad temperature ranges (⩾60 °C), which are tunable through simple variation of hard-segment content and chain extender structures.

AB - Non-isocyanate thermoplastic polyhydroxyurethane (PHU) elastomers were synthesized from cyclic carbonate aminolysis using polytetramethylene oxide (PTMO) as soft segment and divinylbenzene dicyclocarbonate and three diamine chain extenders as hard segment with a range of hard-segment content. Characterization was done via Fourier transform infrared spectroscopy, small-angle X-ray scattering (SAXS), uniaxial tensile testing, and dynamic mechanical analysis (DMA). SAXS reveals that these PHUs possess nanophase-separated morphology with 10–20 nm interdomain spacings. These PHUs display elastomeric response and tunable tensile properties with Young's modulus ranging from 27 to 200 MPa, tensile strength from 0.3 to 9.7 MPa and elongation at break ranging up to greater than 2000%. DMA reveals that nanophase separation in these PHUs is accompanied by broad interphases having a wide range of local composition; this nanophase separation differs significantly from that manifested by thermoplastic polyurethane elastomer (TPU) due to hydrogen bonding of hydroxyl groups in the hard segments to the PTMO soft segment. These PHUs show very good damping performance with tan δ ⩾ 0.30 over broad temperature ranges (⩾60 °C), which are tunable through simple variation of hard-segment content and chain extender structures.

KW - Damping material

KW - Non-isocyanate

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KW - Polyurethane

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Novel thermoplastic polyhydroxyurethane elastomers as effective damping materials over broad temperature ranges

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