VISCOELASTICIDAD DE POLÍMEROS EN SOLUCIÓN ACUOSA: ESTUDIO MICROREOLÓGICO-ESTRUCTURAL
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https://doi.org/10.36790/epistemus.v11i23.47Abstract
En este trabajo se presenta un estudio del comportamiento viscoelástico de dos sistemas de polímeros que forman geles físicos transitorios: ácido desoxirribonucleicos (ADN) disuelto en buffer y un polímero asociativo del tipo multiuniones, ambos en el régimen de concentraciones semidiluido no entrelazado. La viscoelasticidadlineal se estudió utilizando la técnica de reología mecánica, determinando los módulos elástico y viscoso en el rango de deformaciones de bajas frecuencias y la técnica de microreología óptica para altas frecuencias. La implementación de ambas técnicas, en el estudio reológico de estos sistemas, permite extender el rango de oscilaciones de 100 s-1 a 100,000 s-1, permitiendo entender la conexión que existe entre la propiedad de viscoelasticidad de las soluciones acuosas y la estructura microscópicas de estos dos sistemas bajo deformaciones externas.
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