Latent curing systems stabilized by reaction equilibrium in homogeneous mixtures of benzoxazine and amine
Autor: | Ya Fei Fu, Xiangdong Liu, Jun Wang, Ya Zhen Xu |
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Rok vydání: | 2016 |
Předmět: |
Multidisciplinary
Materials science Thermosetting polymer 02 engineering and technology engineering.material 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Reversible reaction Article 0104 chemical sciences Chemical engineering Rheology Coating Homogeneous engineering Amine gas treating Chemical equilibrium 0210 nano-technology Curing (chemistry) |
Zdroj: | Scientific Reports |
ISSN: | 2045-2322 |
Popis: | Latent curing systems are widely used in industrial thermosets in applications such as adhesion, coating, and composites. Despite many attempts to improve the practicality of this dormant reaction system, the majority of commercially available latent products still use particulate hardeners or liquid compounds with blocked active groups. These formulations generally lack fluidity or rapid reaction characteristics and thus are problematic in some industry applications. Here we describe a novel concept that stabilizes highly reactive benzoxazine/amine mixtures by reaction equilibrium. These new latent benzoxazine curing systems have a long storable lifetime but very short gel time at 150 °C. The reversible reaction between benzoxazine and amine is further demonstrated by FT-IR spectral measurements and rheological experiments, and it is shown that the overall characteristics of the latent system are promising for many industrial applications. |
Databáze: | OpenAIRE |
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