Produção e caracterização de um novo polímero conjugado obtido a partir de resorcinol biformilado e norbixina

Abstract

Conjugated polymers have been studied for more than three decades. Initially, the research was focused on the use of this type of material as an active layer in the production of light-emitting devices (LED). Currently, studies include several other electronic applications. Despite the remarkable advance in this area, there are few studies that seek to expand the supply of new materials of this nature. Thus, the objective of this work was to produce and characterize a new polymer conjugated from Norbixin - a carotenoid found in the annatto (Bixa orellana L.) – and the Resorcinol Biformilado, which received the name prfn. At first, Norbixin was obtained from the saponification of bixin. Resorcinol was Biphormilated from chloroform in basic medium. The two monomers were previously treated and purified to be used in polymer synthesis that occurred in the presence of the anilin catalyst in reflux for twenty-four hours. Infrared results revealed typical CH stretch absorption bands (2972 and 2928 cm-1), remnants of the Norbixin structure, and vibrations of aromatic groups (1615cm-1), attributed to The Biformycnol Resorcinol. The curves of thermal measurements (TG, DTG and DSC) show that the new material has good thermal stability, and it can be found that the PRFN degrades from 200 ºC (TG). Through fluorescence analysis it was found that the polymer presented a peak of photoluminescent emission in the blue region. The combination of good structural properties of this polymer, its ease of manufacturing and emission of light on the blue part of the spectrum suggest that the new material can be used for the development of light emitting devices (LEDs).