Two-component waterborne polyurethane: Curing process study using dynamic in situ IR spectroscopy

Chunpeng Chai; Jinghui Hou; Xuanhe Yang; Zheng Ge; Muhua Huang; Guoping Li

doi:10.1016/j.polymertesting.2018.05.021

Two-component waterborne polyurethane: Curing process study using dynamic in situ IR spectroscopy

Chunpeng Chai^*, Jinghui Hou, Xuanhe Yang, Zheng Ge, Muhua Huang, Guoping Li

^*Corresponding author for this work

School of Material Science and Engineering

Beijing Institute of Technology

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

25 Citations (Scopus)

Abstract

The cure reaction of hydroxyl-terminated waterborne polyurethane(HWPU) dispersion and the hydrophilic-modified polyisocyanate to a two component waterborne polyurethane(2K-WPU) in the presence of water environment was monitored by dynamic in situ Fourier transform infrared spectroscopy. With the progress of the reaction, the peak of -NCO group at 2271 cm⁻¹ intensity decreases as a function of reaction time and totally disappears when the reaction is completed, and the hydrogen bond urethane gradually disappears. At different temperatures the reaction rate is different, but there is a great linear fit of the integrated form of the Jander equation versus time. The curing mechanism correspond to Jander equation basically. According to the change of particle size between the HWPU dispersions with 2K-WPU dispersions and the curing mechanism, the curing model was got. The chain of HWPU wrapped hexamethylene diiso-cyanate(HDI) trimer, the product appeared in three-dimensional diffusion and spherically symmetric.

Original language	English
Pages (from-to)	259-265
Number of pages	7
Journal	Polymer Testing
Volume	69
DOIs	https://doi.org/10.1016/j.polymertesting.2018.05.021
Publication status	Published - Aug 2018

Keywords

Curing
IR spectroscopy
In-situ reaction study
Two-component waterborne polyurethane

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10.1016/j.polymertesting.2018.05.021

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@article{24dae93abdbc4f4c832a55d9880576e6,

title = "Two-component waterborne polyurethane: Curing process study using dynamic in situ IR spectroscopy",

abstract = "The cure reaction of hydroxyl-terminated waterborne polyurethane(HWPU) dispersion and the hydrophilic-modified polyisocyanate to a two component waterborne polyurethane(2K-WPU) in the presence of water environment was monitored by dynamic in situ Fourier transform infrared spectroscopy. With the progress of the reaction, the peak of -NCO group at 2271 cm−1 intensity decreases as a function of reaction time and totally disappears when the reaction is completed, and the hydrogen bond urethane gradually disappears. At different temperatures the reaction rate is different, but there is a great linear fit of the integrated form of the Jander equation versus time. The curing mechanism correspond to Jander equation basically. According to the change of particle size between the HWPU dispersions with 2K-WPU dispersions and the curing mechanism, the curing model was got. The chain of HWPU wrapped hexamethylene diiso-cyanate(HDI) trimer, the product appeared in three-dimensional diffusion and spherically symmetric.",

keywords = "Curing, IR spectroscopy, In-situ reaction study, Two-component waterborne polyurethane",

author = "Chunpeng Chai and Jinghui Hou and Xuanhe Yang and Zheng Ge and Muhua Huang and Guoping Li",

note = "Publisher Copyright: {\textcopyright} 2018 Elsevier Ltd",

year = "2018",

month = aug,

doi = "10.1016/j.polymertesting.2018.05.021",

language = "English",

volume = "69",

pages = "259--265",

journal = "Polymer Testing",

issn = "0142-9418",

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T1 - Two-component waterborne polyurethane

T2 - Curing process study using dynamic in situ IR spectroscopy

AU - Chai, Chunpeng

AU - Hou, Jinghui

AU - Yang, Xuanhe

AU - Ge, Zheng

AU - Huang, Muhua

AU - Li, Guoping

PY - 2018/8

Y1 - 2018/8

N2 - The cure reaction of hydroxyl-terminated waterborne polyurethane(HWPU) dispersion and the hydrophilic-modified polyisocyanate to a two component waterborne polyurethane(2K-WPU) in the presence of water environment was monitored by dynamic in situ Fourier transform infrared spectroscopy. With the progress of the reaction, the peak of -NCO group at 2271 cm−1 intensity decreases as a function of reaction time and totally disappears when the reaction is completed, and the hydrogen bond urethane gradually disappears. At different temperatures the reaction rate is different, but there is a great linear fit of the integrated form of the Jander equation versus time. The curing mechanism correspond to Jander equation basically. According to the change of particle size between the HWPU dispersions with 2K-WPU dispersions and the curing mechanism, the curing model was got. The chain of HWPU wrapped hexamethylene diiso-cyanate(HDI) trimer, the product appeared in three-dimensional diffusion and spherically symmetric.

AB - The cure reaction of hydroxyl-terminated waterborne polyurethane(HWPU) dispersion and the hydrophilic-modified polyisocyanate to a two component waterborne polyurethane(2K-WPU) in the presence of water environment was monitored by dynamic in situ Fourier transform infrared spectroscopy. With the progress of the reaction, the peak of -NCO group at 2271 cm−1 intensity decreases as a function of reaction time and totally disappears when the reaction is completed, and the hydrogen bond urethane gradually disappears. At different temperatures the reaction rate is different, but there is a great linear fit of the integrated form of the Jander equation versus time. The curing mechanism correspond to Jander equation basically. According to the change of particle size between the HWPU dispersions with 2K-WPU dispersions and the curing mechanism, the curing model was got. The chain of HWPU wrapped hexamethylene diiso-cyanate(HDI) trimer, the product appeared in three-dimensional diffusion and spherically symmetric.

KW - Curing

KW - IR spectroscopy

KW - In-situ reaction study

KW - Two-component waterborne polyurethane

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U2 - 10.1016/j.polymertesting.2018.05.021

DO - 10.1016/j.polymertesting.2018.05.021

M3 - Article

AN - SCOPUS:85047251917

SN - 0142-9418

VL - 69

SP - 259

EP - 265

JO - Polymer Testing

JF - Polymer Testing

ER -

Two-component waterborne polyurethane: Curing process study using dynamic in situ IR spectroscopy

Abstract

Keywords

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