Three-group type mechanism in the curing behavior of polyacrylate and blocked toluene diisocyanate

W. Zheng; Y. Kobayashi; K. Hirata; T. Miura; T. Kobayashi; M. Iwaki; T. Oka; Y. Hama

doi:10.1002/app.2233

Three-group type mechanism in the curing behavior of polyacrylate and blocked toluene diisocyanate

W. Zheng, Y. Kobayashi, K. Hirata, T. Miura, T. Kobayashi, M. Iwaki, T. Oka, Y. Hama

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

4 Citations (Scopus)

Abstract

The curing behavior of two resins, five blocked toluene diisocyanate (TDI) crosslinkers and polyacrylate, was studied using Torsional Braid Analysis (TBA) to examine their dynamic mechanical properties. The curing process was clearly divided into two stages. Associated with data from in situ FTIR at the molecular level, the first stage was the reaction of deblocked NCO and hydroxyl in polyacrylate. In the second stage, the deblocked NCO attacked the hydrogen in NH group of the urethane bond to conduct deep curing. Computer modelling was used to investigate the lowest-energy configuration of the crosslinker molecule. The space hindrance effect in the molecule causes this type of three-group crosslinking curing mechanism in the blocked TDI crosslinker.

Original language	English
Pages (from-to)	112-120
Number of pages	9
Journal	Journal of Applied Polymer Science
Volume	83
Issue number	1
DOIs	https://doi.org/10.1002/app.2233
Publication status	Published - 2002 Jan 3
Externally published	Yes

Keywords

Blocked TDI crosslinker
Computer modeling
In situ FTIR
Polyacrylate
TBA

ASJC Scopus subject areas

Chemistry(all)
Surfaces, Coatings and Films
Polymers and Plastics
Materials Chemistry

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abstract = "The curing behavior of two resins, five blocked toluene diisocyanate (TDI) crosslinkers and polyacrylate, was studied using Torsional Braid Analysis (TBA) to examine their dynamic mechanical properties. The curing process was clearly divided into two stages. Associated with data from in situ FTIR at the molecular level, the first stage was the reaction of deblocked NCO and hydroxyl in polyacrylate. In the second stage, the deblocked NCO attacked the hydrogen in NH group of the urethane bond to conduct deep curing. Computer modelling was used to investigate the lowest-energy configuration of the crosslinker molecule. The space hindrance effect in the molecule causes this type of three-group crosslinking curing mechanism in the blocked TDI crosslinker.",

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AU - Zheng, W.

AU - Kobayashi, Y.

AU - Hirata, K.

AU - Miura, T.

AU - Kobayashi, T.

AU - Iwaki, M.

AU - Oka, T.

AU - Hama, Y.

PY - 2002/1/3

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Three-group type mechanism in the curing behavior of polyacrylate and blocked toluene diisocyanate

Abstract

Keywords

ASJC Scopus subject areas

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