SYNTHESIS AND CHARACTERIZATION OF A MACROMONOMER OF 2-CYCLOPROPYL-2-OXAZOLINE

• Autores: Suárez Gavidia, Carlos Rubén, Rueda Sánchez, Juan Carlos
• Formato: artículo
• Fecha de Publicación: 2020
• Institución: Sociedad Química del Perú
• Repositorio: Revista de la Sociedad Química del Perú
• Lenguaje: español
• OAI Identifier: oai:rsqp.revistas.sqperu.org.pe:article/202
• Enlace del recurso: http://revistas.sqperu.org.pe/index.php/revistasqperu/article/view/202
• Nivel de acceso: acceso abierto
• Materia: macromonomer; 2-oxazolines; cationic polymerization,; thermal sensitivity; macromonómero; 2-oxazolinas; polimerización catiónica; sensibilidad térmica

A macromonomer (M1) of 2-cyclopropyl-2-oxazoline (Cicloxa) was prepared by the ring-opening cationic polymerization of 2-cyclopropyl-2-oxazoline initiated by chloromethylstyrene and in the presence of sodium iodide as catalyst. The reaction was carried out at 77 ° C in acetonitrile. The cyclopropyloxazoline macromonomer with a vinyl group at the end of the polymer chain, had a degree of polymerization of 25 monomer units and a molecular weight of 2,912. The macromonomer had sensitivity to temperature having a conformational change (LCST) at 18°C, when dissolved in water. The macromonomer will allow, through its polymerization with other monomers, the production of new temperature-sensitive polymers as graft copolymers or hydrogels.