Preparation of poly(thiourethane) networks by using a novel acidic organocatalyst. Evaluation of their vitrimer-like behavior
In this work, a novel acidic catalyst, isopropyl methane sulfonate, has been tested for the preparation of a series of poly(thiourethane) thermosets (PTU)s. The advantage of this compound is that in addition to being free of metals, by heating at temperatures above 100 °C, it releases methane sulfon...
| Autores: | , , , |
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| Formato: | artículo |
| Fecha de publicación: | 2023 |
| País: | España |
| Recursos: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/398968 |
| Acesso em linha: | https://hdl.handle.net/2117/398968 https://dx.doi.org/10.1016/j.reactfunctpolym.2023.105501 |
| Access Level: | acceso abierto |
| Palavra-chave: | Polymers Catalysts Materials science Poly(thiourethanes ) Latency Vitrimers Organocatalysis Recyclability Polímers Catalitzadors Ciència dels materials Àrees temàtiques de la UPC::Enginyeria dels materials::Materials plàstics i polímers |
| Resumo: | In this work, a novel acidic catalyst, isopropyl methane sulfonate, has been tested for the preparation of a series of poly(thiourethane) thermosets (PTU)s. The advantage of this compound is that in addition to being free of metals, by heating at temperatures above 100 °C, it releases methane sulfonic acid, which is the true catalyst allowing to maintain the formulation liquid at room temperature for a longer time than when using the more common dibutyltin dilaurate (DBTDL) catalyst. The materials obtained were characterized by thermogravimetry and thermomechanical analysis, which allow determining higher initial degradation temperatures than using tetraphenyl borate amidinium salts as basic organic catalysts. The PTUs prepared with this catalyst show good vitrimeric-like characteristics, with faster relaxation on increasing the amount of catalyst. The materials could be recycled without losing their chemical structure and mechanical performance. |
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