Different catalytic systems on hydroxyl-terminated GAP and PET with poly-isocyanate: Curing kinetics study using dynamic in situ IR spectroscopy

Yajin Li; Jie Li; Song Ma; Yunjun Luo

doi:10.1080/1023666X.2016.1175202

Different catalytic systems on hydroxyl-terminated GAP and PET with poly-isocyanate: Curing kinetics study using dynamic in situ IR spectroscopy

Yajin Li, Jie Li, Song Ma, Yunjun Luo^*

^*Corresponding author for this work

School of Material Science and Engineering

Beijing Institute of Technology

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

16 Citations (Scopus)

Abstract

Reactions of hydroxyl-terminated glycidyl azide polymer (GAP) or poly(ethylene oxide-co-tetrahydrofuran) (PET) polymers with poly-isocyanate (N100) were monitored by dynamic in situ Fourier transform infrared spectroscopy. The influence of catalytic systems on the cure kinetics of polyurethane reaction was investigated. From the comparison between GAP/N100 and PET/N100 systems, it was found that primary and secondary hydroxyl groups were differentiated due to the effects of steric hindrance. Using Arrhenius law and Eyring equation, the activation parameters of polyurethane reaction were calculated at different catalytic systems. The negative value of the activation entropy demonstrated an associative mechanism within the transition state.

Original language	English
Pages (from-to)	495-503
Number of pages	9
Journal	International Journal of Polymer Analysis and Characterization
Volume	21
Issue number	6
DOIs	https://doi.org/10.1080/1023666X.2016.1175202
Publication status	Published - 17 Aug 2016

Keywords

Catalysts
IR-spectra
polyurethanes
reaction mechanism

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10.1080/1023666X.2016.1175202

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title = "Different catalytic systems on hydroxyl-terminated GAP and PET with poly-isocyanate: Curing kinetics study using dynamic in situ IR spectroscopy",

abstract = "Reactions of hydroxyl-terminated glycidyl azide polymer (GAP) or poly(ethylene oxide-co-tetrahydrofuran) (PET) polymers with poly-isocyanate (N100) were monitored by dynamic in situ Fourier transform infrared spectroscopy. The influence of catalytic systems on the cure kinetics of polyurethane reaction was investigated. From the comparison between GAP/N100 and PET/N100 systems, it was found that primary and secondary hydroxyl groups were differentiated due to the effects of steric hindrance. Using Arrhenius law and Eyring equation, the activation parameters of polyurethane reaction were calculated at different catalytic systems. The negative value of the activation entropy demonstrated an associative mechanism within the transition state.",

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author = "Yajin Li and Jie Li and Song Ma and Yunjun Luo",

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doi = "10.1080/1023666X.2016.1175202",

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TY - JOUR

T1 - Different catalytic systems on hydroxyl-terminated GAP and PET with poly-isocyanate

T2 - Curing kinetics study using dynamic in situ IR spectroscopy

AU - Li, Yajin

AU - Li, Jie

AU - Ma, Song

AU - Luo, Yunjun

PY - 2016/8/17

Y1 - 2016/8/17

N2 - Reactions of hydroxyl-terminated glycidyl azide polymer (GAP) or poly(ethylene oxide-co-tetrahydrofuran) (PET) polymers with poly-isocyanate (N100) were monitored by dynamic in situ Fourier transform infrared spectroscopy. The influence of catalytic systems on the cure kinetics of polyurethane reaction was investigated. From the comparison between GAP/N100 and PET/N100 systems, it was found that primary and secondary hydroxyl groups were differentiated due to the effects of steric hindrance. Using Arrhenius law and Eyring equation, the activation parameters of polyurethane reaction were calculated at different catalytic systems. The negative value of the activation entropy demonstrated an associative mechanism within the transition state.

AB - Reactions of hydroxyl-terminated glycidyl azide polymer (GAP) or poly(ethylene oxide-co-tetrahydrofuran) (PET) polymers with poly-isocyanate (N100) were monitored by dynamic in situ Fourier transform infrared spectroscopy. The influence of catalytic systems on the cure kinetics of polyurethane reaction was investigated. From the comparison between GAP/N100 and PET/N100 systems, it was found that primary and secondary hydroxyl groups were differentiated due to the effects of steric hindrance. Using Arrhenius law and Eyring equation, the activation parameters of polyurethane reaction were calculated at different catalytic systems. The negative value of the activation entropy demonstrated an associative mechanism within the transition state.

KW - Catalysts

KW - IR-spectra

KW - polyurethanes

KW - reaction mechanism

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DO - 10.1080/1023666X.2016.1175202

M3 - Article

AN - SCOPUS:84965054951

SN - 1023-666X

VL - 21

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JO - International Journal of Polymer Analysis and Characterization

JF - International Journal of Polymer Analysis and Characterization

IS - 6

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Different catalytic systems on hydroxyl-terminated GAP and PET with poly-isocyanate: Curing kinetics study using dynamic in situ IR spectroscopy

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