Revistes Catalanes amb Accés Obert (RACO)

La sorción de iodo como método de control de la modificación de la estructura de las fibras de poliéster.

Joaquín Gacén Guillén, Josefina Maillo Garrido, J. Bordas

Resum


The iodine sorption allows to study the variation of the free volume of polyester fibres submitted to dry heat treatments or to hat treatments in the presence of water and/or solvents that are frequently used in the textile industry or control laboratories. From the iodine sorption curve as a function of the thermofixation temperature, it is inferred that the sorption at 65°C alloys to detect structure differences induced by variations of the thermofixation temperatures of the wool/polyester articles; nevertheless, the sensitivity of
the method is perhaps not sufficient to detect this same type of differences in the cellulosic-polyester articles. On the other hand, it is possible to use the iodine sorption at 500C as a control method of the variation of the structure and, consequently of the dyeing behaviour of articles having undergone
the texturizing operation.
Besides the study has related the produced effect in the fibre structure by dyeing treatments with and without carrier, or by treatments using solvents as perchlorethylene, dioxane, and methylene chloriae. The perchlorethylene sets the fibre structure as well as the carriers that were used. On the other hand, treatments with dioxane and methylene chloride product an increasing of rate of weak crystalline order.

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