Overlooked Impact of Interchain H-Bonding between Cross-Links on the Mechanical Properties of Thermoset Polyurethane Elastomers

Zhishuai Geng; Aimin Pang; Tengfei Ding; Xiaoyan Guo; Rongjie Yang; Yunjun Luo; Jinxian Zhai

doi:10.1021/acs.macromol.2c00873

Overlooked Impact of Interchain H-Bonding between Cross-Links on the Mechanical Properties of Thermoset Polyurethane Elastomers

Zhishuai Geng
, Aimin Pang
, Tengfei Ding
, Xiaoyan Guo
, Rongjie Yang
, Yunjun Luo
, Jinxian Zhai^*

^*Corresponding author for this work

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

36 Citations (Scopus)

Abstract

Thermoset polyurethane elastomers made from poly(3,3-bis(azidomethyl) oxetane with tetrahydrofuran) and various multifunctional isocyanate cross-linkers were compared to uncover a new mechanism of modulating the mechanical properties. Extra hydrogen bonding motifs, such as urethane or urea, were built in the cross-linkers and were proved to essentially determine the stiffness and toughness of the elastomers, while the covalent cross-linking densities of both networks were controlled strictly at the same level. The impact of interchain H-bonding on the mechanical properties of the polyurethane thermoset was unprecedently emphasized and supported by evidence from Fourier-transform infrared spectroscopy (FTIR), dynamic mechanical analysis (DMA), and low-field nuclear magnetic resonance (LFNMR).

Original language	English
Pages (from-to)	8749-8756
Number of pages	8
Journal	Macromolecules
Volume	55
Issue number	19
DOIs	https://doi.org/10.1021/acs.macromol.2c00873
Publication status	Published - 11 Oct 2022
Externally published	Yes

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title = "Overlooked Impact of Interchain H-Bonding between Cross-Links on the Mechanical Properties of Thermoset Polyurethane Elastomers",

abstract = "Thermoset polyurethane elastomers made from poly(3,3-bis(azidomethyl) oxetane with tetrahydrofuran) and various multifunctional isocyanate cross-linkers were compared to uncover a new mechanism of modulating the mechanical properties. Extra hydrogen bonding motifs, such as urethane or urea, were built in the cross-linkers and were proved to essentially determine the stiffness and toughness of the elastomers, while the covalent cross-linking densities of both networks were controlled strictly at the same level. The impact of interchain H-bonding on the mechanical properties of the polyurethane thermoset was unprecedently emphasized and supported by evidence from Fourier-transform infrared spectroscopy (FTIR), dynamic mechanical analysis (DMA), and low-field nuclear magnetic resonance (LFNMR).",

author = "Zhishuai Geng and Aimin Pang and Tengfei Ding and Xiaoyan Guo and Rongjie Yang and Yunjun Luo and Jinxian Zhai",

note = "Publisher Copyright: {\textcopyright} 2022 American Chemical Society.",

year = "2022",

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doi = "10.1021/acs.macromol.2c00873",

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T1 - Overlooked Impact of Interchain H-Bonding between Cross-Links on the Mechanical Properties of Thermoset Polyurethane Elastomers

AU - Geng, Zhishuai

AU - Pang, Aimin

AU - Ding, Tengfei

AU - Guo, Xiaoyan

AU - Yang, Rongjie

AU - Luo, Yunjun

AU - Zhai, Jinxian

PY - 2022/10/11

Y1 - 2022/10/11

N2 - Thermoset polyurethane elastomers made from poly(3,3-bis(azidomethyl) oxetane with tetrahydrofuran) and various multifunctional isocyanate cross-linkers were compared to uncover a new mechanism of modulating the mechanical properties. Extra hydrogen bonding motifs, such as urethane or urea, were built in the cross-linkers and were proved to essentially determine the stiffness and toughness of the elastomers, while the covalent cross-linking densities of both networks were controlled strictly at the same level. The impact of interchain H-bonding on the mechanical properties of the polyurethane thermoset was unprecedently emphasized and supported by evidence from Fourier-transform infrared spectroscopy (FTIR), dynamic mechanical analysis (DMA), and low-field nuclear magnetic resonance (LFNMR).

AB - Thermoset polyurethane elastomers made from poly(3,3-bis(azidomethyl) oxetane with tetrahydrofuran) and various multifunctional isocyanate cross-linkers were compared to uncover a new mechanism of modulating the mechanical properties. Extra hydrogen bonding motifs, such as urethane or urea, were built in the cross-linkers and were proved to essentially determine the stiffness and toughness of the elastomers, while the covalent cross-linking densities of both networks were controlled strictly at the same level. The impact of interchain H-bonding on the mechanical properties of the polyurethane thermoset was unprecedently emphasized and supported by evidence from Fourier-transform infrared spectroscopy (FTIR), dynamic mechanical analysis (DMA), and low-field nuclear magnetic resonance (LFNMR).

UR - https://www.scopus.com/pages/publications/85139441994

U2 - 10.1021/acs.macromol.2c00873

DO - 10.1021/acs.macromol.2c00873

M3 - Article

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SN - 0024-9297

VL - 55

SP - 8749

EP - 8756

JO - Macromolecules

JF - Macromolecules

IS - 19

ER -

Overlooked Impact of Interchain H-Bonding between Cross-Links on the Mechanical Properties of Thermoset Polyurethane Elastomers

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