Synthesis and characterization of methyl methacrylate - glycerol hydrogels by polymerization in acid medium

Laura Trujillo-Vargas

doi:10.36561/ING.27.5

Autores

Laura Trujillo-Vargas Tecnológico de Antioquía, Colombia https://orcid.org/0000-0002-9998-5916

DOI:

https://doi.org/10.36561/ING.27.5

Palavras-chave:

Poli (metacrilato de metilo), Glicerol, Ácido sulfúrico, Ácido cítrico, Reticulação

Resumo

Os hidrogéis foram preparados utilizando metacrilato de metilo, glicerol e ácido sulfúrico ou cítrico. Uma nova rota para a síntese de materiais reticulados usando iniciadores não convencionais foi avaliada usando um desenho experimental fatorial 23. Os efeitos das variáveis independentes (tempo de polimerização, tipo e concentração de ácido) foram avaliados estatisticamente usando ANOVA. A rota de síntese inclui reacções de condensação, radicais livres e transesterificação com modificações das propriedades químicas do polímero, tais como a formação de um poliéster reticulado com polimetilmetacrilato (PMMA) e melhorias nas propriedades mecânicas e térmicas do hidrogel. Um tempo de polimerização de 4 horas produziu a maior quantidade de material: 1,37 g quando se utilizou ácido sulfúrico e 3,46 g quando se adicionou ácido cítrico. O polímero sintetizado com ácido cítrico atingiu uma taxa de absorção de água de 214,6%, em comparação com os materiais produzidos com ácido sulfúrico que atingiram até 31,3% de absorção de água.

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