Rheokinetic study on catalytic curing of oligodienurethane prepolymer with glycerol under the conditions of an excess of isocyanate groups
For the first time the results of a rheokinetic study on the interaction of an oligodienuerethane prepolymer with glycerol under excessive content of isocyanate groups [NCO/OH = 1.5 (mol/mol)] are presented. It was found that, when conversion degree х ≈ 30 %, the interaction of isocyanate and hydrox...
| Main Authors: | , , , , , |
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| Formato: | Artigo |
| Idioma: | Russian |
| Publicado: |
MIREA - Russian Technological University
2012-10-01
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| Series: | Тонкие химические технологии |
| Subjects: | |
| Acceso en liña: | https://www.finechem-mirea.ru/jour/article/view/702 |
| Summary: | For the first time the results of a rheokinetic study on the interaction of an oligodienuerethane prepolymer with glycerol under excessive content of isocyanate groups [NCO/OH = 1.5 (mol/mol)] are presented. It was found that, when conversion degree х ≈ 30 %, the interaction of isocyanate and hydroxyl groups is governed by the first order equation with adiabatic self-acceleration. Then (at х > 30 %) the curing process is described by the second order equation. A specific feature of the studied interactions is that, while temperature increases to 50 ° C, the role of the curing catalysts at the final stage is played by urethane and allophanate groups. |
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| ISSN: | 2410-6593 2686-7575 |