Curing Kinetics of Methylene Diphenyl Diisocyanate—Based Polyurethane Elastomers

Shuang Liu; Xiaodong Li; Mengchen Ge; Xujie Du; Meishuai Zou

doi:10.3390/polym14173525

Curing Kinetics of Methylene Diphenyl Diisocyanate—Based Polyurethane Elastomers

Shuang Liu, Xiaodong Li^*, Mengchen Ge, Xujie Du, Meishuai Zou^*

^*Corresponding author for this work

School of Material Science and Engineering

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

6 Citations (Scopus)

Abstract

The curing kinetics of MDI-based polyurethane elastomers were studied by non-isothermal differential scanning calorimetry (DSC). The kinetic parameters of the reaction system were calculated by the Kissinger method. The changing activation energy was observed by the Flynn–Wall–Ozawa method and the Friedman method. The results of model free fitting showed that the curing reaction could be divided into two stages, showing a change in reaction order when α > 0.45 and a piecewise curing mechanism function of the MDI-based polyurethane elastomers reaction system was deduced by autocatalytic model. The extrapolation method was used to determine the optimum curing conditions for the system, which can accurately describe the curing process. In addition, the optimal curing conditions are when: the constant temperature curing temperature of the system is 81 °C, the curing time is 29 min, and the post-curing temperature is 203 °C.

Original language	English
Article number	3525
Journal	Polymers
Volume	14
Issue number	17
DOIs	https://doi.org/10.3390/polym14173525
Publication status	Published - Sept 2022

Keywords

curing reaction kinetics
differential scanning calorimetry
diphenylmethane diisocyanate
polyurethane

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10.3390/polym14173525

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title = "Curing Kinetics of Methylene Diphenyl Diisocyanate—Based Polyurethane Elastomers",

abstract = "The curing kinetics of MDI-based polyurethane elastomers were studied by non-isothermal differential scanning calorimetry (DSC). The kinetic parameters of the reaction system were calculated by the Kissinger method. The changing activation energy was observed by the Flynn–Wall–Ozawa method and the Friedman method. The results of model free fitting showed that the curing reaction could be divided into two stages, showing a change in reaction order when α > 0.45 and a piecewise curing mechanism function of the MDI-based polyurethane elastomers reaction system was deduced by autocatalytic model. The extrapolation method was used to determine the optimum curing conditions for the system, which can accurately describe the curing process. In addition, the optimal curing conditions are when: the constant temperature curing temperature of the system is 81 °C, the curing time is 29 min, and the post-curing temperature is 203 °C.",

keywords = "curing reaction kinetics, differential scanning calorimetry, diphenylmethane diisocyanate, polyurethane",

author = "Shuang Liu and Xiaodong Li and Mengchen Ge and Xujie Du and Meishuai Zou",

note = "Publisher Copyright: {\textcopyright} 2022 by the authors.",

year = "2022",

month = sep,

doi = "10.3390/polym14173525",

language = "English",

volume = "14",

journal = "Polymers",

issn = "2073-4360",

publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",

number = "17",

}

TY - JOUR

T1 - Curing Kinetics of Methylene Diphenyl Diisocyanate—Based Polyurethane Elastomers

AU - Liu, Shuang

AU - Li, Xiaodong

AU - Ge, Mengchen

AU - Du, Xujie

AU - Zou, Meishuai

PY - 2022/9

Y1 - 2022/9

N2 - The curing kinetics of MDI-based polyurethane elastomers were studied by non-isothermal differential scanning calorimetry (DSC). The kinetic parameters of the reaction system were calculated by the Kissinger method. The changing activation energy was observed by the Flynn–Wall–Ozawa method and the Friedman method. The results of model free fitting showed that the curing reaction could be divided into two stages, showing a change in reaction order when α > 0.45 and a piecewise curing mechanism function of the MDI-based polyurethane elastomers reaction system was deduced by autocatalytic model. The extrapolation method was used to determine the optimum curing conditions for the system, which can accurately describe the curing process. In addition, the optimal curing conditions are when: the constant temperature curing temperature of the system is 81 °C, the curing time is 29 min, and the post-curing temperature is 203 °C.

AB - The curing kinetics of MDI-based polyurethane elastomers were studied by non-isothermal differential scanning calorimetry (DSC). The kinetic parameters of the reaction system were calculated by the Kissinger method. The changing activation energy was observed by the Flynn–Wall–Ozawa method and the Friedman method. The results of model free fitting showed that the curing reaction could be divided into two stages, showing a change in reaction order when α > 0.45 and a piecewise curing mechanism function of the MDI-based polyurethane elastomers reaction system was deduced by autocatalytic model. The extrapolation method was used to determine the optimum curing conditions for the system, which can accurately describe the curing process. In addition, the optimal curing conditions are when: the constant temperature curing temperature of the system is 81 °C, the curing time is 29 min, and the post-curing temperature is 203 °C.

KW - curing reaction kinetics

KW - differential scanning calorimetry

KW - diphenylmethane diisocyanate

KW - polyurethane

UR - http://www.scopus.com/inward/record.url?scp=85137765034&partnerID=8YFLogxK

U2 - 10.3390/polym14173525

DO - 10.3390/polym14173525

M3 - Article

AN - SCOPUS:85137765034

SN - 2073-4360

VL - 14

JO - Polymers

JF - Polymers

IS - 17

M1 - 3525

ER -

Curing Kinetics of Methylene Diphenyl Diisocyanate—Based Polyurethane Elastomers

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Keywords

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