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 journalArticle

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 languageEnglish
Pages (from-to)112-120
Number of pages9
JournalJournal of Applied Polymer Science
Volume83
Issue number1
DOIs
Publication statusPublished - 2002 Jan 3
Externally publishedYes

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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    Zheng, W., Kobayashi, Y., Hirata, K., Miura, T., Kobayashi, T., Iwaki, M., Oka, T., & Hama, Y. (2002). Three-group type mechanism in the curing behavior of polyacrylate and blocked toluene diisocyanate. Journal of Applied Polymer Science, 83(1), 112-120. https://doi.org/10.1002/app.2233